county: corson legal location: api nosddenr.net/ogfiles/corson/4003120022.pdfirs, snr vitro, lat...

COUNTY: CORSON

LEGAL LOCATION: SWNE 18-22N-21E

API NO: 40 031 20022

PERMIT NO: 960

WELL NAME: CHEVRON #1 SONAT-

ZUBROD

OPERATOR: CHEVRON U.S.A. INC.

PERMIT ISSUED: 12/27/1979

PERMIT CLOSED: 02/25/1980

FILE LOCATION: 22N-21E-18 SWNE

TARGET CODES:

WELL HISTORY / CHECKLIST

PERMIT TO DRILL / INTENT TO DRILL

WELL INSPECTION / SCOUT REPORTS

OPERATOR’S TECHNICAL REPORTS / MAPS

ADMINISTRATIVE / SUNDRY REPORTS

CORRESPONDENCE

MISCELLANEOUS

WELL HISTORY / CHECKLIST

IrS, SNr Vitro, Lat

LOcA-5(.7.-A

Date t Z — Checked By ' 1

BOND RELEASE CHECKLIST

Well Name 8 Location Permit # 960

Chevron #1 Sonat-Zubrod SWNE 18-22N-21E, Corson API it' 40 031 20022

Bond !i

Pate Issued

Date Re; eased

Surface Restoration

1,- Fits filled.

✓ Site Level

Site policed

V/Dry-hole rarker solid, sealed, correctly inscribed

---- No dry-hole rarkPr desired, letter in ;'FO files from surface ownPr ,

L a.prov C ur 1 c..1/4j-,&24,..-

Layonqork filed

Form 4 (Compltion or Recorrletion Report)

7orm 6 (Sundry Notices and Report on I4e11s)

\--47 prm 7 (R1w:Fing Report)

GeoJogioal Inforpotion Filcd

10//' Woll Logs:

("DST Charts and Reports

1/::.Geologist's Report

V Results of coring and

VSet of 10-foot sample

11••■■•■■•

ITEIIT 9 CA LIP , Coricnt_Bar4,, Term, Dens. ,1

0441 V344z

cord analyses

cuttings (check with Bob Schoon)

PERMIT CHECKLIST

Well Name and Location:

Chevron #1 Sonzat-Zubrod SWNE 18-22N-21E, Corson

Permit # 960

API #40 oll 20022

BOND

Paperwork filed with WO

x Organization Report

X Application

x Bond

x Permit Fee

The Following Papers sent to Operator:

X Permit (Form 2a)

X Receipt for $100 permit fee

x Cover letter explaining material sent

Permit Fee Filed:

X Permit fee w/Cash Receipts Transmittal Form sent to State Treasurer

Notification of New Permit sent to:

X Dr. Duncan J. McGregor

X XXXXWMMAXIgiakitX Mr. Warren R. Neufeld

x D14xxa4txxxacomx Mr. Jack Gerken

X MKXXXOVICUtig Corson County Auditor

Date Check By

PERMIT TO DRILL / INTENT TO DRILL

B19?0, /,

NOV 1979

.

c̀iAres: 0.)

WESTERN c51

FIELD A.,'

OFFICE %I.., ‘c,t, I7E Z

•

State Pub. Co., Pierre APPLICATION FOR PERMIT TO S. Dak. Oil & Gas Board

FORM 2

ZONE

FARM OR LEASE NAME

Chevron-Sonat Zubrod ;IA DRILL ■ DEEPEN ■ PLUG BACK

ht SINGLE ZONE wmu. NO.

1 c.4 OIL WELL ■ GAS WELL ■ MULTIPLE OPERATOR

Chevron U.S.A. Inc.

FIELD AND POOL, OR WILDCAT

wildcat ADDRESS

P. O. Box 599, Denver, CO 80201

NO. ACRES IN LEASE

2,710.55 LOCATION (In feet from nearest lines of section or legal subdivision, where possible)•

1984.3'FNL & 1832.5' YEL th t4 SEC. TWP. RGE

SW NE Sec. 18, T22N,

COUNTY

Corson NAME AND ADDRESS OF SURFACE OWNER

Bernard Zubrod Morristown, South Dakota

ELEVATION

2260 NO. OF WELLS ETC.

1 PRuptARPD DEPTH

7860 ROTARY OR CABLE TOOLS

Rotary NAME AND ADDRESS OF CONTRACTOR

Bomac Drilling 10403 West Colfax Lakewood, CO 80215

APPROXIMATE DATE WORK WILL START

Nov. 30, 1979

IF LEASE PURCHASED WITH ANY WELLS DRILLED, FROM WHOM PURCHASED (Name and address)

PROPOSED CASING AND CEMENTING PROGRAM

SIZE OF HOLE SIZE OF CASING WEIGHT PER FOOT NEW OR SECOND HAND DEPTH SACKS OF CEMENT

12.11:" 9-5/8" 36# New 600 To Surface

DESCRIBE PROPOSED OPERATIONS. IF PROPOSAL IS TO DEEPEN OF PLUG BACK, GIVE DATA ON PRESENT PRODUCTIVE ZONE AND PROPOSED NEW PRODUCTIVE ZONE. GIVE BLOW OUT PREVENTER PROGRAM IF ANY

It is proposed to drill this Exploratory Well to a depth of 7,860' to test the Cambrian.

Attachments: Drilling Procedure Certified Plat Chevron Class III BOPE Requirements $100.00 Permit Fee

TITLE Engineering_ Ass' t. DATE Nov. 1979

NOT WRITE BELOW THIS LINE

rYwqrxwo,

CHECKED

chool and Public Lands Date

DATTIVAWE DATr. Dpremher 27, 1.9/_9 CONDITIONS:

❑ COMPLETE SET OF SAMPLES, AND CORES IF TAR MUST BE SUBMITTED.

❑ SAMPLES, AND CORES IF TAKEN, BELOW DEPTH, MUST BE SUBMITTED.

694:44 STATE GEOLOGICAL SURVEY

WESTERN FIELD OFFICE

Supervisor, Western Field

R21F,

LANG =IWO LAND PLANNING

•

R. 21 E.

co

CHEVRON-SONAT 01 ZUBROD ELEV. 2260D

1832.5'

SEC 18

: n: ; hr'. EY c, _

Svt.? ,-, ,.) , , - : , , ,,--,

: .42, ...; ..... :tH DP'4'.•°*. 4j1

....;,- ... . „..... 4,,,,,, * .•'

• ..... .„.„,finot

0.0,„,,gow n„,

/ 04, ENGhyti:°' c.3\°

cip

C• .4eG. NI% si.b,44. • 4 ult • 2171 E

T. 22 N.

SURVEYOR'S CERTI FICATE I, Harley E. Swenson, of Bismarck,

North Dakota, hereby certify that this map was made from notes taken during an actual survey made under my direction on OctOber 25, 1979

-Id that it shows correctly the drilling location of the Chevron-Sonat 0 1 Zubrod as staked on the ground during said surrey.

r ey . son Registered P •fessiona I Engineer an• Land Surveyor SD Registration No. 2171

T 22 N., R. 21 E. and NN•K1o1i

BLACK HILLS MERIDIAN CORSON COUNTY, SOUTH DAKOTA

FOR CHEVRON USA. INC

SCALE 1 11: 1000'

NOV. I, 1979

SWENSON, HAGEN • CO. P.C. Consulting Enginit•rs

PO KM 1155, 111 BASIN AVENUE 1111111111ANCK, NORTH DAKOTA sism

701-121-2680

MAP SHOWING DRILLING LOCATION

OF THE CHEVRON-SONAT

# I ZUBROD SW 1/4 NE 1/4 SEC 18

Intermediate 0/N Oil String/

Liner 0/N

DRILLING PROCEDURE

Field South McIntosh Well Chevron-SONAT Zubrod #1

Location 1984' FNL, 1833' FEL, SW NE Sec. 18, T22N, R21E, Corson Co., South Dakota

Drill X Deepen Elevation: GL 2260 KB Total Depth 7860'

Non-Op Interests

1. Name of surface formation: Hill Creek

2. Estimated tops of important geologic markers: Formation Approximate Top Formation Approximate Top

Mission Canyon 5086 Red River 6700 Deadwood 7330

Pre-Cambrian 7841

3. Estimated depths of anticipated water, oil, gas or other mineral bearing formations: Formation Depth Type Formation Depth Type

Mission Canyon 5086 Oil, gas or wtr Red River 6700 TI " u

Deadwood 7330 II II II

4. Casing Program (0 = old, N = new): Surface 0/N

Hole Size 121/4" Pipe Size 9-5/8" Grade K-55 Weight 36 Depth 600 Cement To Surface Time WOC 6 hrs .

Casing Test 2500 psi BOP 3000 psi Remarks

5. BOPE: Chevron Class III 3000 psi MSP (Series 900)

6. Mud Program: Depth Interval Type Weight Viscosity Water Loss 0-600 Wtr-Gel - - _

600-TD Gel-Chem + 9.0 + 40 sec + 12 cc

7. Auxiliary Equipment: Drill pipe safety valve, PVT, Kelly cocks, mud cleaner, degasser, automatic choke.

8. Logging Program: Surface Depth Intermediate Depth Oil String Depth Total Depth DIL-SP CNL-FD gamma-caliper, IntegratPd Gamma -qnnir - Caliper, RR dipmeter

9. Mud Logging Unit: 2 man Scales: 2" = 100' 600' to 3000' ; 5" = 100' 3000' to TD

10. Coring & Testing Program: Approximate Formations Approximate Depth Length of Core

Core 1 DST 1 Mission Canyon 5080-5140 60' Core 2 DST 2 Red River 6700-6820 120' Core 1 DST 1 Deadwood 7330-7390 60' 11. Anti,ipated Bottom Hole Pressure/Temperatures/Hazards and plans for mitigating:

Normal

12. Completion & Remarks:

kit

Division Development Geologist ' Division Drilling Superintendent)? Chief Development Geologist Date //AV/ 7 7

CO

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d(1)100H MO-13 A3N39831N3 * ALTER NAT E CH OKE MANI F OLD

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Chevron U.S.A. Inc.

ROCKY MOUNTAIN PRODUCTION DIVISION

GENERAL INSTRUCTIONS AND REQUIREMENTS FOR BLOWOUT

PREVENTION EQUIPMENT

ACCEPTABLE ACCUMULATOR UNITS

A. FOR 8" AND LARGER BOP UNITS.

1. HYDRIL 80 GALLON

2. PAYNE 80 GALLON (4-20 GALLON UNITS MANIFOLDED TOGETHER)

3. KOOMEY 88 GALLON (4 22 GALLON UNITS MANIFOLDED TOGETHER)

B. FOR 6" BOP UNITS

1. HYDRIL 40 GALLON

2. PAYNE 40 GALLON (2-20 GALLON UNITS MANIFOLDED TOGETHER)

3. KOOMEY 44 GALLON (2 22 GALLON UNITS MANIFOLDED TOGETHER)

C. A VALVE SHALL BE PROVIDED FOR INTRODUCTION OF EMERGENCY ENERGY SUCH AS BAKER HAND PUMP)

FROM AN EXTERIOR SOURCE OTHER THAN THE ACCUMULATOR. A VALVE SHALL BE INSTALLED TO PREVENT

FLOW FROM AN EXTERIOR SOURCE TO THE ACCUMULATOR UNIT.

II. CONTROL UNITS

A.ALL VALVES TO BE CLEARLY LABELED TO INSURE PROPER OPERATION AND TO ELIMINATE THE POSSIBILITY

OF CONFUSION.

B.HANDVvHEELS FOR PIPE AND BLANK RAMS SHALL BE CLEARLY LABELED AND IN PLACE AT ALL TIMES WITH

CLEAR ACCESS. A BARRICADE SHALL BE INSTALLED FOR THE PROTECTION OF THE OPERATOR AT THESE

MANUAL CONTROLS.

III. PREVENTER UNITS

PRESSURE RATING OF BOP EQUIPMENT WILL BE AS STATED IN THE CONTRACT OR ON THIS DRAWING.

B.

DRILLING NIPPLE AND BOP'S TO HAVE SUFFICIENT ID TO PASS HANGER FOR NEXT STRING OF CASING TO BE

SET.

C. NEW API BX RING GASKETS TO BE USED EACH TIME A FLANGE IS ASSEMBLED.

D.FLANGE BOLTS ON BOP'S WILL BE TIGHTENED AFTER PRESSURE TESTS AND ONCE A WEEK ON A ROUTINE

BASIS. CASINGHEAD BOLTS TO BE TIGHTENED DAILY.

T. PRE VENTERS ARE TO BE WELL BRACED.

E.PRIOR TO RUNNING CASING, PIPE RAMS WILL BE CHANGED TO ACCOMMODATE SIZE OF CASING TO BE RUN.

C.. cAS1NGHEAD SHALL BE INSTALLED SO KILL LINE VALVES WILL BE UNDER BOP'S FOR PROTECTION. KILL

LINE VALVES TO BE KEPT CLOSED AFTER PRESSURE TESTS.

H. ALL REPLACEMENT PARTS TO BE OF SAME MANUFACTURE AS BOP'S.

IV. TESTING

BLOWOUT PRE vENTERS, KILL LINE, ALL VALVES IN THE SYSTEM, KELLY COCK, SAFETY VALVE, STAND PIPE

VALVES, ROTARY HOSE, ETC. ARE ALL TO BE TESTED TO THE WORKING PRESSURE OF THE BOP'S OR AS

STATED IN THE CONTRACT.

H. BOP SYSTEM IS TO BE TESTED UPON INSTALLATION AND EACH WEEK THEREAFTER, USING A TEST PLUG OR

AT THE FREQUENCY STATED IN THE CONTRACT.

C. ALL TESTING IS TO BE DONE WITH CLEAR OR DYED WATER.

D. TESTING PROCEDURE IS TO BE CARRIED OUT SO EACH VALVE IS TESTED INDIVIDUALLY,

E. ALL B.O.P.E. TO BE OPERATED DAILY; BLIND RAMS ON TRIPS.

MISCELLANEOUS

A. DRILL PIPE RUBBER, IN GOOD CONDITION, TO BE USED ON KELLY SAVER SUB AT ALL TIMES.

B.A FULL OPENING VALVE IN THE STAND PIPE WITH A 2" VALVE DOWNSTREAM FOR CONNECTING.A PUMP

TRUCK ARE REQUIRED. THESE VALVES ARE TO HAVE THE SAME PRESSURE RATING AS THE BOP'S.

CHECK WITH COMPANY REPRESENTATIVE FOR DIRECTION TO INSTALL OUTLET VALVES ON WELLHEAD.

D. MODIFICATIONS OF HOOK-UP MUST BE APPROVED IN WRITING ON TOUR REPORTS BY COMPANY REPRESENTATIVE.

INSIDE BLOWOUT PREVENTER AND FLOAT VALVE TO HAVE CONNECTIONS FOR DRILL STRING AND TO BE ABLE

10 PASS THROUGH BOP STACK INTO OPEN HOLE.

11-74

WELL INSPECTION / SCOUT REPORTS

I

SOUTH DAKOTA GEOLOGICAL SURVEY Western Field Office

SCOUT REPORT

Farm/Lease Name #1 Sonat-Zubrod

SWNE

Sec. 18 T. 22N

R 21E

Number 1

Date Scouted 1-75-R0

Permit Number 960

API Number 40 031 20022

County Corson

Operator Chevron , U. S . A .

Elev. 2260

Est. T.D. 7860 Actual T D 7770 Spudded 12 - 10 - 79

Contractor Bomac #32 Geologist Don Conner

SCOUT'S OBSERVATION: DST RECORD: Plugged, rig will move to #1 Sonat O'Donnell on 1-28-80. 7-28-80: Marker solid, sealed, properly labeled. Pits are dry, site can be (r--,

leveled. ✓

10-30-80 Site is clean, level, seeded. Approved.

FORMATION TOPS: Niobrara Muddy Dakota Minnelusa Charles

2048 Mission Canyon---4998 3134 Lodgepole 3358 Nisku 5864 4044 Duperow 5910 4754 Souris River 5994

Interlake Red River Winnipeg Deadwood

6118 6500 7088 7244

PLUGGING RECORD:

6700-6400---100 sax 5200-4900---100 sax 3600-3500--- 40 sax 0650-0550--- 40 sax Surface --- 10 sax

DATE PLUGGED/66101W= 1-25-80

CASING RECORD:

5/R From To 61

From To

SITE INSPECTION:

Approved X

Not Approved

REMARKS:

SCOUTED BY

Tim Kenyon Fred V. Steece, Supervisor Geologic Assistant Western Field Office

OPERATOR'S TECHNICAL

REPORTS /MAPS

Chevron EZZO L40

Chevron U.S.A. Inc.


SONAT SDGS

FIELD: South McIntosh

WELL NAME:Chevron SONAT Zubrod No. 1

LOCATION: SWNE Sec. 18% T22N, R21E, Corson Co., South Dakota

CONTRACTOR: BOMAC

DAILY ACTIVITY REPORT

12/27/79

12/28/79

12/31/79 BOMAC 32, 610, WOC. Cmt w/300 sx G cmt. deg at 300', 3/4 deg at 610'.

BOMAC 32, MIRT.

BOMAC 32, RURT.

days 1. Spudded 12/30/79. 570 1 /5-3/4 hrs, Run 610' csg,

1/02/80

1/03/80

1/04/80

1/07/80

1/08/80

1/09/80

3. 2370 1 /241/4 hrs. NU ROPE & test. Tag cmt at 569'.

,(4' 4:1:, -fr

r•, 4 -, • 0) 2 t ‘ en - , ÷ 3 .; v ,00,\94. \s,o)

%.?0,"4.47.

01/4 4r2) .,

"'NCI zik.1,q"

BOMAC 32, 2980, drlg. days 1/2 deg at 2758'.

BOMAC 32, 3722, drlg. days 4. 742 1 /17 hrs.

BOMAC 32, 4170, drlg. days 5. 448 1 /221/2 hrs.

BOMAC 32, 5022, PU core bbl. days 8. 852'/49 hrs.

BOMAC 32, 5071, core no. 1. days 9. 49'/17 hrs,

BOMAC 32, 5082, PU DST tools. days 10. Cora No. 1 5022-82. Rec 60 ft. 11 1 /21/4 hrs. POOH & LD Core No. 1. Made cond trip for DST No. 1.

1/10/80 BOMAC 32, 5082, RIH w/bit. days 11. DST No. 1 5030-82 times IF 15, ISI 30, FF 120 FSI 180. Rec 3416' wtr (CL-1100 PPM). Press IHH 2639, IF 270-513, ISI 2262, FF 1672, FSI 2262, FHH 2039. Sampler 2400 cc wtr. BHT 135 deg F. Ran DST No. 1. POOH. LD test tools. RIH w/bit.

1/11/80 BOMAC 32, 5383, drlg. days 12. 301 1 /211/2 hrs.

1/14/80 BOMAC 32, 6293, drlg. days 15, 910 1 /581/4 hrs,

1/15/80 BOMAC 32, 6500, PU core bbl. days 16. 207'/14-3/4 hrs.

1/16/80 BOMAC 32, 6552, coring. days 17. Cut Core No. 2 6500-52.

1/17/80 BOMAC 32, 6582, Core No. 3. days 18. Core No. 2 6500-60 rec 60. Cut Core 2. POOH and LD core. RIH for Core 3.

1/18/80 BOMAC 32, 6616, POOH DST 2. days 19. Core No. 3 6560-6616 rec 56'. DST No. 2 6490-6616. Open weak incr to 10 psi in 30 min. Dec to 4 psi in 60 min. Times 15-30-60-120. Wait on daylight to pull tool.

1/21/80 BOMAC 32, 7220, days 22. RIH core bbl. 604V491/4 hrs. DST #2 6490-6616. Times 15-30-60-120. Rec 5750' wtr. Sampler 2240 cc wtr 4200 ppm Cl. Press: IHH 3227, IF 648-1349, ISI 2906, FF 1510-2691, FSI 2959, FHH 2959, BHT 150 0 F.

1/22/80 BOMAC'n; 7280, trip. days 23. Core No. 4 7220-7280. Rec 461/2'. Cut Core No. 4. POOH and LD core. RIH w/bit.

SONAT Chevron

Chevron U.S.A. Inc. SDGS


FIELD: South McIntosh

CONTRACTOR: BOMAC

WELL NAME:Chevron SONAT Zubrod No. 1

LOCATION: SWNE Sec. 18, T22N, R21E, - - Corson Co., South Dakota

DAILY ACTIVITY REPORT

1/23/80 BOMAC 32, 7760, drlg. days 24. 480'/23k hrs.

1/24/80 BOMAC 32, 7770 TD, logging. days 25. 10'/1 hrs. Circ hole & wait on Schlum 7 hrs.

1/25/80 BOMAC 32, 7770 TD, WO cmt to P & A. days 26. Finish logging. LD DC. RIH open ended.

1/28/80 BOMAC 32, 7770 TD, MORT. days 27. Set 5 cmt plugs. Well P & A. Rig released 7:00 AM 1-26-80. Final report.

erc"7"- A' X, 54 u in.

fti /C2 (..-73 \\IS

CHEVRON, U.S.A. INC.

CHEVRON-SONAT #1 ZUBROD

SW NE SECTION 18: T22N - R21E

CORSON COUNTY, SOUTH DAKOTA

William G. Brown

HELTON ENGINEERING & GEOLOGICAL SERVICES, INC.

2929 Third Avenue North, Suite 329 Billings, Montana 59101

( 406) 248-3101


Chevron-SONAT #1 Zubrod SW NE Section 18: T22N - R21E

Corson County, South Dakota

TABLE OF CONTENTS

I. GENERAL

Well Data Summary Location Sketch

II. GEOLOGICAL DATA

Electric Log Tops Wellsite Sample Description Core Description Geological Summary Drilling Time and Lithologic Log (In Back Pocket)

III. DRILLING AND ENGINEERING

Daily Drilling Reports Deviation Surveys Bit Record Mud Summary Drill Stem Test Reports Plug-Back and Abandonment Report

IV. REPORTS BY THIRD PARTY SERVICES AND OTHER DATA

Open Hole and/or Cased Hole Logs:

Schlumberger Dual Induction Laterolog/SFL/SP Schlumberger CNL-FDC-Gamma Ray & Caliper Schlumberger Integrated BHC Sonic/GR & Caliper Schlumberger Continuous HRD Dipmeter Schlumberger Fracture Identification Schlumberger Directional Log Schlumberger Computer Processed Log

Drill Stem Test Reports by Halliburton

V. DISTRIBUTION LIST


WELL DATA SUMMARY

Well Name: #1 Zubrod

Location: SW NE Section 18: T22N - R21E Corson County, South Dakota

Operator: Chevron, U.S.A. Inc.

A.P.I. Well Number: 40-021-20022

Elevation: 2271' K.B.; 2260' G.L.

Co-ordinates: 1984.3 FNL and 1832.5 FEL

Total Depth: 7770' Driller; 7773' Schlumberger

Status: Plugged and Abandoned

Spud Date: December 30, 1979 at 3:00 P.M.

Rig Released: January 26, 1980 at 7:00 A.M.

Hole Size: 12 1/4" to 610'; 7 7/8" to 7770'

Surface Casing: Ran 15 joints of 9 5/8", 36#, ST&C, K-55 casing. (Total of 598'). Landed at 609' K.B., cemented with 300 sacks of Class G cement, with 2% Calcium Chloride and 1/4# Flocele.

Cores: Core #1 5022-5082 - Recovered 60' Mission Canyon

Core #2 6500-6560 - Recovered 60' Red River

Core #3 6560-6616 - Recovered 56' Red River

Cor Core #4 7220-7280 - Recovered 45.7'

Winnipeg & Deadwood

Tests: DST #1 5030-5082 - Mission Canyon MC-3 Recovered: 3416' Gray Sulphur Water

DST #2 6490-6616 - Red River A,B, & C Recovered: 5750' Salt Water

Helton Engineering & Geological Services, Inc. Chevron-SONAT #1 Zubrod Well Data Summary Page 2.

Abandonment Plugs:

Drilling Contractor:

Wellsite Geologist:

Additional Information:

Schlumberger Dual Induction Laterolog/SFL/SP 5", 600' to 7770'; 2", 600' to 7770'

Schlumberger CNL-FDC-Gamma Ray & Caliper 5", 581' to 7771'

Schlumberger Integrated BHC Sonic/GR & Caliper 5", 612' to 7770'; 2", 612' to 7770'

Schlumberger Continuous HRD Dipmeter 5", 612' to 7772'

Schlumberger Fracture Identification 5", 3900' to 7771'

Schlumberger Directional Log 4000' to 7771'

Schlumberger Computer Processed Log 5", 4700' to 7757

Plug #1 - 6400 - 6700 with 100 sacks of Class G cement.




Plug #5 - Top of surface with 10 sacks of Class G cement.

Bomac Drilling - Rig #32 Toolpusher: Mr. Mike Leghorn

Mr. John H. Hughes

Mud System, Wyo-Ben United, Bowman, North Dakota

Logs:

N

t LOCATION SKETCH

WELL NAME Chevrar5M1Ar Zniffad

LOCATION SAUTNEliectiq 151 ra ncrip)

inca_cslindpatio____

Lennon,500-01 DaKok

F-1

Wo-07,500.41Witlit

50 viiie5

chew, -50N111 Ituby ✓ -44

r

Ir n 1 A


ELECTRIC LOG TOPS

Chevron-SONAT

WELL NAME: #1 Zubrod LOCATION•


KB ELEVATION: 2271' DATE RUN: 1/23/80 PICKED BY: John H. Hughes

FORMATION DEPTH SUBSEA

CRETACEOUS

Niobrara 2048 223

Greenhorn 2596 - 325

Muddy 3134 - 863

Dakota 3358 - 1087

JURASSIC

Swift 3470 - 1199

Piper Lime 3730 - 1459

PENNSYLVANIAN

Minnelusa 4044 - 1773

MISSISSIPPIAN

Charles 4754 - 2483

Mission Canyon - MC-4 4998 - 2727

MC-3 5052 - 2781

MC-2 5182 - 2911

MC-1 5206 - 2935

Lodgepole 5300 - 3029

DEVONIAN

Three Forks 5838 - 3567

SW NE Sec. 18: T22N - R21E

Form HE-G3


ELECTRIC LOG TOPS - PAGE 2

Chevron-SONAT SW NE Sec. 18: T22N - R21E WELL NAME: #1 Zubrod

LOCATION Corson County, South Dakota

•

KB ELEVATION: 2271' DATE RUN: 1/23/80 PICKED BY: John H. Hughes

FORMATION DEPTH SUBSEA

Nisku 5864 - 3593

Duperow 5910 - 3639

Souris River 5994 - 3723

SILURIAN

Interlake 6126 - 3855

ORDOVICIAN

Gunton 6348 - 4077

Lower Stony Mountain 6456 - 4185

Red River A Zone 6500 - 4229

B Zone 6522 - 4251

C Zone 6574 - 4303

D Zone 6658 - 4387

Winnipeg Shale 7088 - 4817

CAMBRIAN

Deadwood 7244 - 4973

PRE-CAMBRIAN

Granite 7726 - 5455

TOTAL DEPTH DRILLER 7770 - 5499

TOTAL DEPTH SCHLUMBERGER 7773 - 5502

Form HE-G3

OF 15 DATE I - 1 - 80

WELL NAME C.9F1YDIfi -.70N Al I 70,10rod LOCATION \ .11 = A; c I ^ I- _ .1 Kot-q


WELLSITE SAMPLE DESCRIPTION

LITHOLOGY DEPTH

SHOWS.

SAMPLE DESCRIPTION Porn*. Stain.

• I . ' - - - — 700 P -ci 11-51- 1•ryv vv anyfri NP:Ily ;Ir. 517 Way Fit' ,f .3- ,,,,,/ fr 15 flan Rff, r ryp, h 4 . 1qc 7 0 f,h,J1"fi

'v, pigifacr-fltuiri mit", trth tiA 4 Ife),;IN:Silt '

ao - ; ,... t , , •

—; — — — -- GO

— — — — 790 8W

zia -h,L-Trapentgy, .41•uf ca Jr, vyfn plc! 'ft to -rico; I umpy

- - -- -- -- 85-0 elk - - -- - 880 4/ei - - — 910 'In tray,•51r,q1c,finn, bitty

all/ — -- - 940 - - - - - 970 dig

i 001 • 10 — — — — — 1030 on --- 1060 ala - --- - --1- - 1020 - I( 5h co 15 a 7- hgferoll-brn, Hi ic xil yi '6d )or, Inoc rden,w4 yir,lie --- - - - -- 11 140 einifr0y y0110)0010 ca nil, vy,fit i rid, Iinupy ition - - — 1/ CO - - - - - 1180 V14-ny f it»4121ffy anti, - - '`---- - 1210 i arn. 'I? brut; 05-11

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gla . — — — — -- 1510

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- ---- -- - - 1870 ala -- - -1' - 1900 Oki witrpyr incl

ala QM

112094 qla

- - - - - gig

Form HE-GE1



WELL NAME Chevron- 50 NAT I Zvbrod LOCATION 5W-krif .er T-2 9 N I F CM3 on Col nify5rvith flatlet Q

PAGE a OF 1 5 DATE -2 - 80

LITHOLOGV DEPTH

SHOWS

SAMPLE DESCRIPTION Poros. Stain.

----- bald tec n % hiociityhOiVy -irCadcfli:d ifirly[anciimidry 0 0 1 a 2 0 1 / 0 ct ir NM linna it 4

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5 a .! gma Q 0 Mgt

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, Rolm I' ifirlibUir le 4- i 5 NM P =Main lu

, (71) 1 ly2/2467-11* Form HE-GE1 GEOLOGIST

WELL NAME Ciii,1(01-501d AT I Zany/ LOCATION IVIr t iccla Tz?r: r---;21E-- jar, cn,

PAGE 3 OF 1 5

not!? DO1Inin DATE 1 -2- F10

LITHOLOGY DEPTH

SHOWS


-- --- 5fain 51 '0 7 `Al'cii gio t 5 Min-,n ' (Iv Tilly vy Dfr. - - - - - 5ffrin P-F 35 d911 I'd) 'frig" V 4il crr 514v n: - la '5( i4, 11. I or4n -Eli iitrer5rzin por, itn9c140 ‘ive,11

Vycjd initi I rod' 6Y N5 Snit N s '

y pn

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. Tr'yr, dollWI, r;ren cirri rfr pyr-yikro caw; ,iii rim/ M hn4 HY eiria Virl'irfit rven,/ , vv 'hori-y1-4 "15 " ' " c" . cc , ,_,

5150 VG 74c to N Ma r' . ' 16cro,w4-ro cry 55gr90b4r9 -,iri 59.1..rdi pyr i iicl vyyd leer:I.4n , or 1\I

%GO '/G a/ N5 5990 F-VG 7j 5c ctia , N!5 lr %Arty -.Tr r r; 0/ eficic ( ors. -tboh an q apo fir i c& fairivrrcrjrqk Fr, ,31

N5 5520 r Thceifir 'peck( l en (ia irrb - ,,fr al akar 'frig ' ,lora rinir irireinjon N 5 ' -, ', ' par, .E.50

0 —.5'

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,

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— 35-0 G 5 u . Migrnifirtairinni i, / • P.. d i n p or >

i i • / / i

— — 3560 5bfgq f I'. Ir57 9, 3 vn 61)1,,vc xy ;pit' ,-3ft 5h- ara 5 1114 v nfin),:frisakior,, rd infer fan por N5.--frlli,mci lb rilfg or olq -357o yr?

— ---3 :0 P 5, r 4 .51) ' f a , I s € nth s•• • • _I'. 55-90 P

, iterranteet , I' Fat '3. q

-- --- 16,00 ,) cdo — — 3610 P 5 qa W/fRid pat fsf)vlIffr 0 ifin140.5.494ATYieibair lic efteki

Cgir/. print-err:few 5: — — 1(Wo P co N15

—5650 P 0 N5 —56,40 P q/q N5

0/4 N5 — —5650 P —346 0 P 0 5

- —5670 P 0 (115 — —1680 G "I iq/c/ Wiffifleani ss,dull whytin3r,an311) Su bgM3 %veil 5 or(,191nor„fraci,g4 inrerBfq

. poi, 15 — --3690 G crio N5 — --- —5700 G q/Q N5 --- 3710 G a/q N5 — — --17° 0 G op N5

5750 G Q/d Ni belf; r, rc,2;P; pi-tell/1<y -- ,-730 Is b ih jdfi c. . - cisali , rpir 41y) den »;d hd .trt/cal nr/1-, creaky m lc la Vtin dr,-IllicyneriX rnipali , den ityi ,Idd E vniwni(15,creai;i -ift:cicilK

/ i -1-5750 15 QIriDolifilc,cier.cr xdh c i I i t)ynpy, Dq calc -to GIvItc15 buff-rourgn/ 3a44 rriGio r y pp At katier A int

-576 0 no a/a - I-- ,—/ / 1--3770 Dplrilq. V innrih t' 51,11/511 incfrto lino; I'vn (int* I mph 'on — — — 7 - -J- 57'0 5 hold . Mi nor eid• a as c • is de //tyro ang , 4. f

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Form HE-GE1 GEOLOGIST rxviVitee, I '



WELL NAME Cilri -oft -ei r AT I Zubr (I4 LOCATION 5PC 18,1.27 T1 - 7117-: Cono” Counisc 5 ' Kni

PAGE 4 OF 1 5 DATE 1 - 3 -F30

LITHOLOGV DEPTH

SHOWS


apy cJ cl- ■ XV cirl,Horti rsig Lid Pi/Y:01(4 R 511- ■ fl Id pol o -low am ) r -.‘, sfr. 1r41,, -I c-..911-c g Yin, PiThil9fir 14 ,

-- -f- __, d — .5 00 crigTirtsb rocri Or r cT - kit; n. 'r oft firm 4' n - - ' 10

18'2' 0 alq

51v i sffy =rh md kry - ()nig s P. --4 vire .! o Jr( fine r el tcrca I ,d/11-1-54' ma byv-ornj, pHy i- }. - -.-

c oIr ' V1i a(c - Liptil4h^liffh VIC010;ittn2 - 06.1 .9 ,, . err, I P j,,ft 3 , 1 i - --- - - -- 3Wo

519/q

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rnic - gh,der -A c k I Ky,Jitiripy mcd l!ci bb ff m ic,X.tu,en,p1rhi md tia

- - 38510 1 oru -rcrlQ1514112) ,I li clop 514i; 51,2, grol- re:4, clyp zif,(1,a In)rnpylcioitylparty illdo; , 0 /It wl, , -,)ic '64 e ; 4'

— 38(00 al ' r / — -sli7 0 Q Q -- 3880 alq

D61, buff-to c'reani rn r, X-fin dr-id 51 c h I iffy, gyps f,014vfnana 24 hd c rod 4-0 do micro eto - i , , L X.1 9 • i 4 i l , r 't 1 r I I 11 .

la

' / ' 3A90

--c-M--5900 - — - -- .39) 0 ---) orn, ni oaks cid)/ ,r) Y, cfy.?sf viachcc oeoPeipl, 511'541brrorni ,vy a@ isf-fi

, i , , ;1;) - -1'• s 1. , • '

:__ --3920 9 - - 5950 010

- - — 5940 Qh — — 59 50 5b onirfigthnratrncf4 -46 04 lid

— - -- 5960 01 - - - --- - -- 3910 a 3

-- -- 5 80 g rA b(16?,br1-°°13 v Y 'I9'''Fr - — - 5 90 WQ -4000 lig

0 i 0 qk -.--- - 8020 °la

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f-rn) lc, K.I t, 7fr ;I, vv nyvo, if .414-10 i. .,, :d 1,4

Viiihijr,airrtr5tkiripia9cnci,vy 3 (2 i r-Ir rizra 4 por; NS 9

• • • • • - , - oRo P-VG 0 VG

-- T 1100 VG _,A5 elo,11,5 Minor d 61 gig. Irdnl,creenv mic xi In (In; fir scid, lici! N5 1)0 VG ) 049 n3

pp pnc

120 VG a a N S _L_ / JO P t• LA ' • i a. I- , I/f - , . e 1 I . 1 s. h„ !e I Ar •

P .10 V 14 drlY 72 L • is q riliG - X107 'Y r , 20) lei id ■

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Form HE-GE1 GEOLOGIST 71)1,7 c.-

WELL NAME C huron - 50NAT I Ziihrod LOCATION c-VP c -7? r

PAGE 5 OF 15

DATE 1-3-A0

LITHOLOGY DEPTH

SHOWS

SAMPLE DESCRIPTION Poros. Stain. _L ./.._. / _.L.4160 Vol gig -7

r4110 1 / / 41c0 q1/4

T--/- iv 7 /.-. 4 19 CI P La) rwrn 1 mW A In] ar ./;:!oyibi + ; 1 4-02i) .1, o r I or, 5.1 as 0 YH-1 /-71rOyivild .ind 511 red on . v i v rilx 4:f-, 5h Wioc r/a /in; 1 iirekv[ioefi. „

r --i- 1 9 00 P cii / r/ / 11210 P-F 1)11 il(/ biar Nice Win dr?, -frpi , rot' civao Iktio 1211 11.5 1 r 55 1440 Wile( a Calri t 054 -

., I d We d r VO' rth'il 1 4,f 1 if i . I li rfl v" .

/770 , f 0 17-6 r h5 1

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• • ' ' • /- ; -1- v--4- -'1260 o , , ...,

270 Poi / mg(rift brkif )1r,». X4Ildei /i oyiii fo•Fi..-iciiclen,ayr7Cmol h4 ,lor, ' '=—Thqn

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Form HE-GE1 GEOLOGIST 4 Atitei2e4

WELL NAME

LOCATION c5)111-1•1 rlq: F); f 2? N F COrMlin COUriV 9nii4 ;"P9V1-rri PAGE 6 DATE 80

OF 15'

LITHOLOGY DEPTH

SHOWS


_ --- . -- - - -- 454 0 qlq 4560 glo

— •116-60 cola — - — 4670 (ilia

- 4 6q0 alb 4c90 q/;

- — "1600 qiq ----- 4 610 0

q19 ----- — — ' -1610 (Ha Trdol (1 1/9 II; 1 1 iir P '; dr I, q , u 414 -- — - -- -4640 cill girl I 450 1 t

I# a a YY - 41 ;' PI:vr r, 4 , -,7 , .a ,a0 -

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- ii(,30 fiVcipi ' i

- --- 4610 12 ),nh yel lorl AO Ifriijr9rol l-l- Fru „otri pl-ryi fft. . buf-f- pif - - 46,90

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Form HE-GE1 GEOLOGIST



WELL NAME CheY(011) -SONATI ZIlbrOg LOCATION 51r)-k NV* ciPc In Tc 17 '11 N ° F Corsnn Court nowt"..1 Kaio

PAGE 7 OF ig DATE 1-5-80

LITHOLOGY DEPTH

SHOWS

SAMPLE DESCRIPTION Poem. Stain.

) ti c man) ?it clilli, -7(1n Pre- icry wiC,-A-141 ary r1-1-/ rilq kid. Irc1ier-r frry CY1Pc *114 , . ) f7110iirt k d 1 Li'• , A j-4 910 F q/ck?' ,

- 't -)-- 1 - A N\A92.0 _ , __

q .c -X of q I f .r1)rrt vvI) km, r- ,11i1 16.-). IT = f :mil - X-.3 1;;. -T 91 c.a1 Wa idol nu -1- In ,Avi . .

( ?el/1y, cin: n1 a 14) I = Ry

/ ' A f-\--“I'30 P 7 - 1 ' 4 • \ 1940 P old Ni i; or dol.cmic VV'I. • Yr)/ G-.51/r) Ny (41.117!')4.)-rFt.",

LT.--i - ' - f 4 --) . ---A9 50 F F'

cil , ; .... •

Q/r.; exr• it no do! 4960 a' I

-r-i -L-- -41970 P 1, croon, 511;r1 , 'ay \ 'LOCO Rh, yrs'0‘ . cryn- 1 11 .4 T ,4 n'd -,1

\ \\ 49 2 0 ! Priv Tr. ' }---- 1 -- -- 5 000

Y 5 dOli 1017;n0:177 1(.".YA .,;., !VT in yrd 12=1 rOY'n

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\ \ \ \ \ A5020 Ailligaja e . cogit 02 - 5082 5ce iry, d colil (:L LiifL.,th2: _

ar D -G 030-50:2

illia±t±cripro! , 4 c - nf . , , , 51-115077; 150c9(1 5082:

i - r- 5080 Lc Ic1irr buff K cr:-,oei,ticAO-Iiic (Alt:, rocrlriY wir-dthi,rnirorchlfriv roof -inter x-I Iv Fo( ,115 :i-r121K -rlyelifYic, on' dr, tr,-.) ii" levi 5(70 .vild ti . rinl cid c lie. ;01.5 • '-- 5090 a)a ' I , jc

1 1 1-. 7 i 1 5110 gig 5120 ihs 1-71QC I 4015 ii , -r

1 i I --- 5730 20 .._1.__,___1_674 0 gig gig 5750 1 , --I- F.

I 1- -r _.

5160 __t_,.__J. ___,_. L.

ft

, ;-,770 ce, ‘.7

I ' 5180 qh --'-- -r--1-J--1— 4190 lc ?Low vi. F r C! iv, 1,:)(7,4}2 , ,A 1 / , \ \ \ \ \ \ N 5i2 00 Arhy.frtici y Y','?': X -f hi ri4y il'?''..: lit --7 - ----r --- \ N ' \ .57 /0 P ki\r try a/q.1/ofecijc i-.16qr,),YniclO v1.11 1.,,t,..--rt ? 1 t4 rjx 'rnic-,N1-1 1i, cif )1 -ftn; 17,1) in rod -!--6 dol,

mic-k1h r4,5fe.N , ' LI -/ - t (----- 5-920 P Poi op N 5

Do) q fq 5 -Ti-doi , 5I cq10 :.1-1;r„?.) bu ff yy.fil ?id -Pciir lerrili Ner.5. L5 buff to porsit I / ri °Z 50 P-F cce,cr,-,2 ' . •0 );r4 ord t,rwt: 00) =,: 41,tx,flivio,, : to 11 (Toils ? oor to4qif in*,,,frai , r(i olyt

oc fr, w (11;4' AI•5. - 1

5' (40 OirActlir, vi ,yirro buff' iii ythq --14- jy iii-riv- Vlilrorirfpp p oc. -"Pt'dis ryd 14, N 5. 1_5, heft° i )(coro -41;dg I' d y •

Form HE-GE1

PAGE

DATE

WELL NAME Clrifigil -c5011.[IT I 7:0 brad LOCATION 51,1-1A 1.45 ex, I " TP9 11- R '2 I Fr Cor nr Lcon -IC'9csrre DaKotq

a OF ) 5 !--10-80

LITHOLOGY DEPTH

SHOWS


/ - 5"C a F 1 0 - ' ." S .; 1„ r: ncr ;( '0 n; n r-flii,'-no •1 rir r -Y ?II; -- -I I e, ,-'” y Y,-I FOONLJ

-

J---. - 1-- - --- 5260 P-F 1 )01 ola mipoorin ,letri ir. hrY -i ir 4 yy 4) ON rnif)N5.[,- billPh c (ern f i to n d de-tritt; Iv/in X 'Mr Y i - o eh iTr tt poWlittrei.liv t c!„,.11(t-kh-.4.4'Jil it'd kap 9 ' _J-T----- - = C270 P- F

I 52,80 PG 1/0 }1:101/fItifirfl:i- itinaffit Vt4:1)(4/ii,i lo 4.- fila it ii..±, rein vw N i <-- ),^t) ftil,) vicd 7 ciekrir 001 rt ki I i I I', rtiir: - ',1 :1?),cli!Ify, aril ,,-4.1- In }Id lid pnor-bigd 1' oh 19 • 4-• r ) Cy' 1 '

I , 5290 P-G 0/0 . 5300 F I 5 bryf,c), -0 cregy)01/4A r,; d cf rdrirrit mei( i)" ri;11, X 4 bi -rn ch 'it .ciff yjnortirl'er *Po ; cklify ,, ,,,,, „ , ff i L pot ierr9r, 4 l; CYCLIT/, '. C•211 `71 -r Cr: i r,' r ' Pi 3 iri--) rcqy oi lc ilopc4, hd

1 0 - 0.. r4 ''''',, J 1- ' ' . . c ..r '211 Yr 1 4 pnye tno

vil 15 P3, . 4 Jul; -A/II,c ?Ply -;-1-1-- -.- I 5520 a/c?

'1 —1530 F gjoi MO( k rillir, ? (IV II; :.1- -til/G Fit' r 1 ;. rX.1 14 por 5f N5 5540 r q/ci

1 J55'5:0 ,

-2 to rif- i- ti6 I") mIG - 5DC ON p I 1 I 1 c3t, 0

419

gig f 11 7' ( )0 CV Io r ti. d - voi , .,

1 :t --T'57 ,0 0 l IL,15-5

539 o Q IQ ., . , 1 1 I , ..c// 0 0 1 -- don ‘riii vdryd-fh Ira % orcrA, PDC in v , -6 drirl<wctiiiic Iiii ' 1,P('Sfrf) of 1 .Yry tr. , . , I ,/ i wilr, illd-ti, lin y ( n;d1n1ri:ril- - tiv V'.1 11 ■ 4 0 weir I

, _ t dru:yft-ro y,,-,1 i(-] ,.. 0 ,

_c_.1_ni-1.- 5-4 10 Cin l r 5420 cati 1 1 I5430 q/Q i I 5 ,10 ala

I 1 I I -54 50 ci/a .1 . 1 -- 1- I 5-1 (,0 .7/0

giq --- -T 1 ' 54 9, 0 Qfri

---1--- -------1- 919 0 5500

,/0

Qlq 1 ga 17 ,7-fri'w., Mr- , / rfidlii'd A. _L 6-5 7 0 0/0

I ,

I - 3-(.2., 0 q/a crillo Q/Q r 5-57A ak _ur-_-_-i -_ _-_ ___ 5"67.0 oth

__ __. . - ;575"-Th '111 - - - '

----1 3-310 5590 )._, :

oq (//0

5600 ethi . , 1

' 5-6 0 (71(/ 1 - - -1--

(,2

n47.4/%1Arree----- Form HE-GE1

WELL NAME aieVrowiDWAT I .202rod

PAGE 9 OF 15. DATE 1 - 12 - 80

LOCATION \AMINE): Ser, ITYn 1\ 1 -19 ?I E C0150n crgle 5 Al DC1.61-Q , , .

LITHOLOGY DEPTH

SHOWS


-1 — F--i - i 57;50 P Lc, cr ara ri , ; Pact buffi Akv)iir-t ofk, cirmt"-fots ciTtfpwrtriat cilikfr To twcrx-t -In,pnar di fltfyt in -Yerrtin For___41; in lino) wi 15,w11-; f< Clejr, 14/ elrefliej c..Cregni 1-6 vkj i i)jr le a rq hop Via hd

i---- i ----- 'I-- A-—

L 1- 56 54 ,10 P qtg

5'0 P ql_o , Tsr—

-- 1 - • •' ------21- • -L- 54 60 P ah Trctoi, calor:ft i't Xtbi,okilliq. _ciryfr-- 6-670 ____I-5 cntisi noinOrbuffit w kInc,-rofr rinit-40:2,,c,[3)trif raol-rix c:211-Q,-, 10nitic - x-fln e ptgichlify

A reef xtln poi. cfri4thfccif ‘,/ v c4ti-ywickrpt- yg, (yr-amtow oil I, , wlq50-c-higv

1 /, , 1 ' i A A

c4.12i-11,44 i 4 ---14-1- Zr Ai-- 5170 Lej icila c,ov.1 wort, chrrly chrrt-1/415, n110, -I 0 vy til dr-I -fit uta170( (tip X-flii, qua \./ V k

- Ti • I c

t c air, (wan? vui . c- elladn , qu ' brl j ___I _ I 4 Al__ 54, 0

Po i g / i / - n : I 1 I C/ Y i 0 q

5700 I.-2 01 alq :herr: vy Itr via?) awl whi tif/fa v/ dr-rn t en', 1 COM , •bd -Thiol,calrc kff, In IC, A il oorbiten=f pew pky oft ' v,

inky-cal vii Is bull '40 (-num seti c h111y 115 Circe? 61 , Oiiiii "'ft ch I 4

11 TA -z

2 he ola -Titc- ;-,o J.- --A,---itE 5710 1 5120 q/9 4 CA -1-A- 1 A I

57.'0 1-9 dolic,n1d to Iroy-bru mic, xt I n. cirli,aqs, li d { i /1 ,/ __L_ 7 i f riallt ti nil to trafrain,nylto rgy irn in lc, icithifirn Ind 5,1 lefic y ,,,B: 3 , pily e bni•vvid , i clilifil ,

5710 J41) 111 . i- 04-cal il/c/ 4 575-5 ' ( 100 19(111ff 15 ) 5760 I 5 x dnlaig / i 1 / _, 51710 nig

i- - ......... L . _t

5780 Li nid .hru-syn) lc to cvn-, X-IlnciettaK / , n c 5790 oh I t

-- '------k— 55( 00 a k 014 J /

6820 1.-• t_dol it- 15 ind-1011bru- 4 I I / I rn a 0 s I ' 0 I J

) I __I 5ftch lift'.

500 gig I 1

5140 . No -44, 51'50 No 9p1. 5f60 i

1-5'clolic, a I, I- • t a 1 r Y. g 4 nd ild ' (57 lo wood ci r6 kn cit ) ' r I t 1 , 5170

• buff, in ic,-)(-1 lu de g (77 a w ed ,Mig , i'3:1 I r

SR SO 1-, 'gig, fin calc„boff fein t,: nnc.AtInficiyla j I / I -1---- -- ---- -- -'--- 5f a • _ . l" ' 40 hi) I lil 4 " 15I i 3 C ;(' i P i

611118111 - a n,:fl 1 -' )900 p -1

,

I mt-ritla

171 I G.,

Ira ..) a I I I ql 41 4 1,11 fq I V' . V

'1 7"c111.4r

. ••• 0. , A Go . p h I 4 0 ' g g , i b i '111EIVITAIPM/EllifirMINIMM , 1 t • • t

vorsF<N r r e b I n 4 4 0

5• 10 P-F

20 '-P ' '5 --5930 P-F nig

594 P-F n q y -7--' 1,:51c,gir.,cwei:,e -rowh i mir,-"ort vr Ai' yi Ist,44:420 r to q-ct illlc,' X41r) 5 if/ ra 4 pny 3 y r 3

-10 winturdnI,n)k-,-12-Ia.dru_rad IA N5

Form HE-GE1

WELL NAME CMPAIYOrci OP) AT I 7.ohrnd PAGE I O OF 15d DATE M3 -80 LOCATION 5W-1,, Nr Ac5er.)/37-22. N -R21 E. C,nrsoriCanunt OtHil Dr11(iste

GEOLOGIS Form HE-GEI



LITHOLOGY DEPTH SHOWS ,


-L– ; -- -. -. -2- 5260 F-6 -/ -----

'---, Vol ail l N5 l-- 5970 F-G Do; c?,fel, N5 M 1 4 OV CIO) C. r (110 li) vAl V .6 , X': j)11 ---,,r,t;fp ido j,ery xthi N5 por

- 59B0 fr-G DOI to I'm -F, , or/ , N5 i dole I w , fair-thrt-Liwier"-xtir ovN 3 5-Ft;

/ . ' 7-- 5990 F-G Mi 4 6 ca.' I I I i I 6 M A 4e" I al la I -to qy-cro i Mg-. xili

/ e /- 6000 F-G po i . u fi)

xti iffuirli14 ithixtir yaryrvto den nid 14)15 1 I nordall Itc dell pit c1 H3,-WId Ill 1.:), ra cl 're 1131, Tofn daritrtly ostracsth, 1111174 / 1 '1,

c' a

Till ma e ••• lt d

11, au ,• ill IN • 01 Ii • 01 Cr InntlegrarginarannErignirMWHITEIMMUL

11 pa d c ri fry flak- -firm. . 11 ' 0 ' 5' cat .el ( 1,1 04 1 4 1 0 •

I I. I 1 . V 0 I I Mir 1

• a

— I

'6010 F-G nj ;Gib 4 .4I

i - GOZO . cl-

6030 L MN Win( variiii libryi-gy,r Yyp10 w ir itbildei old Iid,oryqn1;51pyririr m _sit y 4 r/ iro Ncemie, i;ifer/CA w lei 17 , )Terr,a PI I FrC 4<1/1/C/10 V? ill &Ile 0, elc 045 Pr wk J ( I 44 . rG.. f- 14 ' 4 le•

I (o040 1,5 eft? -1-- - - -I—L GOO 1.1 Gila

1.10 Li UN

6060 6070

I 1

-5 ' 6080 1,2, kora crect)crypoho)G12116 pkly 5F+ ro No lid nnun2cithiccuviia---r-

• tiff o It gykthflo If bril-q y i r y ktr„ m ic, xfin, d r. ii, Ilia, hid k d3rad To )7,) nor mictofia

p_a __54iicwitauczthitfirnoadtkirnitali,

5411 -1/5/3vriff

it_ i_ ja03

1.1`141,1 1 -- 6100 dfl iriCwiarri X mii, X-1

-1 rfev-Thd IA

-ts

-4,,

6110 Lc) city — — — — -- 0120 51/hornit-red play,,IcalG;f-1: 517 d tap-, c)ubwXy, iiqle — -- — --- / /

--- 6130 512 cl liviiac4119w xy iri-ltrh Wi'1501.7.11' ciKin,L,‘,1 -1-y, pil '-firm i 1 0 Do •

3

c• lc r co I X11 r n!1 A ll . 1 s a I-. , If

r di A , , . A , Or MIE 1 r i c cr It A , n e• inrc.

. ' - (D150 P .t)

(0)(00 P-F Vol cellfcc ma mica- x RI 'I- ty mitrua wIdol.calc, c -xlinikly - 1'44 v.:4 lic1 —Viol Cala 0 re,no mic,--mr, ve1Y t ia ly irAtorfir por,N5 Po calctuff mom mic shc -kiln rleoncry,14174,-Ir sifit,voei co IV5 . .

nrdo eirGaya 411 Pin vygd orleY X,Fin pn . eft; N 5 ---/ - i i - 6170 P-VG ala - --- I - t ; - (9/ g 0 P-VG Doi oh? Ni ----7 • ' - - - 6,190 P-VG Dol cdri 115

01 r,Q 10 bog in cyr.on, mit. in cxyp On . den,n Hs, hd ryi to vy,firra fn X1100C 4 I-0 ty- , 9 - -- -- ---- WOO P IM per vo .s_por,114 II 5 _

1- ; -/ , ' 6210 P-F Vol ah, Trctl,polr only to 007 - buff. r bd.1YrIAL &EaInto wli, vy-flito 44 92-Xtlr e rwi tin,proTO-Filit iiritrxlio r W 5 firm:L(1y_,

(, ' • _ F /0 si

• I ", , - , 1 . I a .a. at 1 ' lig 1 ula Oi• Trqvn IA, vy r x#41,0 -11 r,:py

--/---- 612.40 .1),11 al D,huff1-1-0 c,rra in , WiliCA 0 Ci'llx -1-bi clrn ruct Wel andlovv lo -lo-hi Xfln den

5

m,



WELL NAME CheYi011 - SONAT 1 7obrod LOCATION r5ecIPST2 1/11-R '21E Conn?? C,00111 560110a6M

PAGE 11 OF )5 DATE 1-13 -R0

LITHOLOGY

__ _ _

DEPTH

SHOWS

SAMPLE DESCRIPTION Poros. Stain. !

/ 2 0 Dal alq / / GIZ IN qja

-- i 62 0 62/30 Do) q/Q -irkc }row -FP- t- 111Ky T-dol rlcalr, crew 4-1-6111(y

9 q G2.90 1,01. whifirri 1mill-147 4304 loc. tv/5er.vy .fii X41;) dol Pnl,c,Yrnris imic,-xilvi,drii,

m (-I .1;c1 I Q

L ' — ROM (032

G G

. • , • • kfi4 dreo cd irirn, Iii por_ fly/1A )io lid pot.' lc. vr , hp N5 pram'

Nigh 1,13r). in-kr x-th? cm, Pt5 G3?>O

.,f Do cr.27r, ,,,;1( - xi1 .t dfm 41- ,:'H , .-101 hiry TPdol cgli-ti vInlir -XI IP drm md hd

6-5/1 , , . 1

z_ , PO or iC - >e, 41 'i dr ti ,nd lic! i c___ G3 (,0

-- — --

-- 6 7n 5h, Hd-to If m, on -ft loc. cubvxv iFtv — ----- — 6 '3'0 51,; gig - a

— — — // -,— G390 Sh oo

i o P Poi r qlr, ti u ff, in It lUelb NI , X-11N,dreoroorinrci - X-11r or 51-1 In )3 crit-ro i ;LI IA N5 _/ P-F 0 e IA • 10 , I 14 4y ' r . lt, r, : 1 r ,, , T rr - , fl- o d c.rif ' r 4 El • I II 4 . I

• MI IMINE L M M I S I IMPWEENI k5ale? r y

1 1 ( 4 ra to-fi, r r 5 c veaNto titi for vu r limci le Ito ,/c4 Ray, nr;o Mi nor 73,fri;4 -thit.3)/ 16) , ij . ' • - P -to f , i c. 1 ) 7 h; - r ' • 1 ' rr • } . 1 i___I___, C-4() ) 5 gig

- - ' i - (c970 Le, gig G98o I-5 cilc! _ J--- 1--L— I

I -.-

analkal _ C f 1 ir IC 04 1- - ■ i-c t . -x ? d- on . r • hd ri

y ) . j_

Mannarer g. )L, • 'n Hior l ifi2-. 1. 1r ' , r- , 1 ,-, '1 , if ta a , rnortertx41 1, CITY21;4 N5 (99`l, ccife) '

COTa-: 7._ 65-00 - (-) 5'60 .,c'r cicitillfri colt- dctscrirm CORE --5 6560 - n616 et ddbi"ed cm drncrIption

Ffor) D5T 2 6,9 90 --To616

6620 -, 0 • C -4 otC. 0 I , I r .1 s a a ' - - - - ( ( n 4 q

G 40 P F

1-- qlq.1\lir,Or 11, It- brolh buff-2'n ic- ciocte) iir An f-ftro or ;;)1 " i 1 -1- 11.1Orr) Lc) atrf, N511 - 15,1 off to cycnn , rnic -lb fri dgrir,rneiriX Ya; ir. xilKt;)cid'Jy,,f . al( infer xibi g clilvfy vorN5

1--- - - 6660 P-F or 67670 P- F a/9 1 (4R0 • I- u lb cretin, mic,-to avo X-fli2 alty -.Will Inidbdiqteited fly Jr) crcant,w11 51c! 1Ky i

,c bilnor 15 Ithr ;buff 01 ir!lesur }i; micrxfir e c-)ftr'oor-roggir inflY41r , pnr ft5 P _ • i'5 - e :" fi 6r ! " Or' I I . "fr• 4 4 • f e' I a .:1 i • ., IA

Form HE-GEl GEOLOGIST (:17 at' Ile'



WELL NAME Chevron-SOMA T 1 Zubrod LOCATION

_ c n

PAGE

DATE 12" OF 15

1 - JR -80

LITHOLOGY DEPTH

SHOWS


c brit/ x , or 5ft- N`) 6700 P Lis lc N5 -

k-- -.. -' -L- G - 1 --- -

JO Gil? 0

P P

- e '

K, burr .ix crcq,,,,vnic-to Gryp xi -Jim/J -1-y f I- 1-o h:d fici inIrlreq/ .415 Uterni trib c1,16, fyft 4 .-1), ir, hOff'to C (CP.14 n) if, to 4): Of dr! Y l it , I i:ifi nx r1:16 ,-/F) i micrxtli,iporell iljf, k ini-cixilp, voi-

l 4-1,1\J -, G750 11 J-i ghli.5 - 11'1, F1-3y4rn .)116 -to c rvp- xi ■ ) (icy ;1-1 d ad 674o F' 1_ -, rol PI.5.

i ' 1_ 7 ' G750 P 1 c ̀7 NO ..-11. 1 °' 0.4 b l'Friy crieL mu' XIII; drv;,p11y yrd hd 1

C,71•0 P I ;) a1/4. Ni Mi■ i (415 Pf brit -ii., hu -1, niic-sc -j to vyiic-kf 1 , 'rte N ■ 6770 F-13 I .-,G10 I lc buff to cre.9/4 rn ir, ,t)c to vy.14 M I: ),6 irlb od ivricrx41), imr, 5 115

Q I

G7g0 F-6 _ 1 4 (.419 N5 7---1-- --I 0.9_4_ L.,,,-,fea,,, wit 5-14,1-ii itcy in* rca ‘,4 r,:i, fri or 1-,,,buf-F-Ihcroig t/ 1 ic.. )01; rll'ir 5f-1-• I buff , L____r____1 -m

in Ciftnn I . m likffil Cirl1/4t ■ NM/YE X Ch } KV 5-11 .1 i ) ; V , t. i ivr or K1- 11

, 1 p0r,511- N5

6800 F alci 1 --l• -r--I- ---L 4- i G810 F elq

J 682.0 F (714 --L _1_ 6810 F i a, q [ ' 1-7-----1----- r---L GFYI0 F o,la

(1850 F • -E-- — 1 , G of r c. r nry r, 5 e

, h'ii r ior '4' 1 :60 (7870 G L., q la 5 L-- c. rt.. qm ol.t.',,,' 5F 6; I "rf in-t9T.Q 1 u// , 5 grOn1,11;1(710 4i9 arta mainA

ch 14 5frNS -1--- - -1----- r - - I- 6880 G nig "

-- ---- - 3900 '

G gig 49)0 F-G 1 ,crcareil

v 15.if c w14,, ck lki Jar-cm' ,i9 m tr, 9/15 crqm, ill ir, -In vyrik r1rtritr, oodtix chilly

ral -19 )1) ,, icor 1-) fdolic 1 ,-,. Uoff; vy)o , x41:1,5Citivirl-rhici -In c,v5 xfln, huff r.alciti, ' I

f ir-1-0 1 vrric X1119 po6 N 9 ' 6920 F-G gig TE-- ----1--

---r -- - I (9930 rc, co 69/40 F-G . .i (995-0 F-G C ilq (19(90 F-G giq lirdrifirtw Q.? A 11n ?la -11" ch .( 'ty ii , wri V - henr.inip- X-1-119, lid Ninny 1, buff, 1 --rE

e • • ' 6970 NG gig cXce n D dile ri-

1 1 G980 F-G (la -T 7 _. L- 7. 6990 F-G oh FIG e • 5 91 C - , 1 le . e, n •

--,ificblif 1 rch--/cql 4 15 :buff-III cran, 0/ I ril .b I, ± 1---t—i-1000 !

"7010 P-F 1 5 (Mora nv cy degrif rocrtrix cll 14 To lipc. Xti i j , -±- 7--- I t . tr ) Is .. k mi . e c- f A S. Tr at • cYear4 n kl-i ;1 ,5) c n 'It -5,FY,faivilltry An por, 5 r 15 yncl ib Irgy-brry,c,ilp X41•1 t I V (1) . • 114

7020 a I— 1

Form HE-GE1 GEOLOGIS ny,



WELL NAME Or:e:ron - f70NAT Athrnd

PAGE 15 OF 15

DATE..119L10.

LOCATION :5Y/LNE,L , 5,-ifc IR T2r? N - F 2 1K COr rin Cnm- ty9ol 1 .. Dlki•Yrn

LITHOLOGY DEPTH

SHOWS


• 7050 r 040 I -

1 rills- Phi/ dr; 517'n . r, ;i 1 iitt-i4d 141T. rr a 1 / 15 c,roa it, wi-x,1111.6711iy, 5)

pyi(i-l-ic,,rliy,7-flit I 5C. It for, I fi 61' - C M/ CI; 1 6/ :71 pyfrfrtir w/i 0 >i, t Hiif ‘5 ,RorT11{,/spr,d15 1, „ v i 4 „ • - 11 17 --../" .0) • .4 r' ;I' r , - i

1 vY it P's ri-k km, It) io -X-11; (1'111 14 r 4, r, ,,, r In cif-tritit)afrk Yoir,- XI dri lo 10 o or I -rikt 4 70r,f1 t...m rjic„d 'i]d . M47; it b viThc 'TA n! ( ;,,/,,frty b/11,51-t, 9 temonl,.5eitisnl.fy

- • --IOC° P

-- - ,

7660 P (2/ -7070 P 2I9 7 6c 0 P (lig V090 F-G 1 .5 oft?, IN 5, 55, vy 1Ta vycli:crar.51 -1-0 501 rci II 5ortTfrio faIrthcgdirttrraran FAYN5 . ,01?

Tr."5b Wm, 1YH erf 1-19 Pitni Pi lc ,- ;dip L 'kr r'rty -4 'Et 4 c- 7100 FG ) IrLN'' Ttst, -1 07 1/14‘: of , f;vvi e, fi r 6r,

cii73 rig t-.', / r- ',7 1 .4y ncl )1,711'1 'ic-Ir?c,., po N.7 , ,-I Ilelitte) - 71 / 0 F-G - k5- 012-s IN5

- - 7120 F-G --', (ha 5k, 14Iy-Arn, rity-5 ,111' ,1■15 - /150 g.-51-L c() cr-rf rt: -4.7);i3n; -2, y f)o):I./Xy FPI: — .

— 7140 7156 at L 1 iv

,

5 r 4 9 , cere' -'74'0./X;'^rli; 'IN sfr • - 7I 6,0

" -r-

ap , I / ,

7170 q/cr ---- 71510 aia — — — — 7 / 9 0 q/o -- - -- -- - -- 7200 0 1

-,1 ,a/a cila

-- ---- --- -- -

2 '1 0 alg -- CORJE .. 4 722 - 0 5er det'aibdcort d n rip linn

- 7290 F- 1/G • 5 5, i Oot,o, r,; (V] r cr, ,1 17,0},rd 4 6 :,,f ;hurl :7 noy vy ad ',it ...Vito!, tat N5 Pc../ chotri:. ,cr,r1" , 5c1o11 vitt vy-fficiol&. 'on - )1 ok, '4: ':- oY,e)fo lf,N row;;14. it .a,calr-ina't V1(:„71c1:1 1;77 ,friir --1630

err 10 o ,d1- u - c-'01oQ iv i cloth , lk - f' li , c-,v-Hv 'in 011.V/il l dill it • 7506 F-VG o/o Ni5 - -- -- --‘--, - • -7:5]0 1--VG q4 I' 1:5

,, - - ' - .7/ 1.'n F-VG cllo 11151-rcio1,1 codc hyff to ert.:, fc.-. K. 41 0 cip, ,p i fii 1 0 4y; ,4), c o fir il 5 . -- -- -730 F-VG o/o N 1 17k %IC/I orn -0 y vy 1)..J 40 fil r ;obo 4H:A drj '

0 54 oir,CA,/ Fitt hi Ur 1'.

,,fric ra;) ,; , sobval,ty fctfill'oriri io. trwi ray-, Iiii

7'40 F-VG aro ti 1 If-) Il i ?tfi Ili `i,ytfil -Alyc. -1- . - - 7350 P-VG 5s r,r1r,9 ni lb kiftvylf, do C,nar, 5I.,14 .10 14/ ', friar nk19,Ftiors 0 ei. , iyia 'tate./ pork' vy cid

)11/Joroil pureFvr IA if, ifv./ I 'OA/ 0 1 ' / 7 rra ref N 5 . M ir 10 Sr '7'7 ri 1 h Cr cr p4or-564,i"), 'rat 1°.r 1, Tr eL 'I - rI O• VI rd r `0 Ili ' 1‘ 5

1-340 P-VG 1/21a r 0J ir 0 1 qtJ7K(wLvy,6;c104‘ , 4r • ) Ira -T,' Ww37? n4 50 ill fid i tit. tY0 ron por, N '5 u , , L

7370 VG 2,LoE-2L-y,; d-tO cr5rivi,poovryortfrnifikm,vrictiq"1 1tCcali1. co,r,14 • 7 .-.11 0 in' TI T i:Y orriac..,:a Vifil ii - r., •.4749);- , -.-.•.0kIrcl -f0 a;;.1,-fil-t-prp P,',1" ,f dlitiyi;o1VIti,frigifq innifterwe

poVA 5 '' . ci

Form HE-GE1 GEOLOGIST

WELL NAME Chr-iroll - "5 0 00-1- 7F) 1.-) PAGE I OF IS LOCATION c,4 N (r4,- 5CcJ T/2,9 21 fr Cony C, nue ./e -1 DATE ! f.;";) - 80

LITHOLOGY DEPTH

SHOWS


- - -1590 PUG I}?, ', iill . Ai p IA or 13 0 Ye; rii,VVIP"}51/C/0/151)kr.I4 of/0 Vi:c.re , P p ildr)Y;f15i fyit r , c 11 Ilf ' ;;7•4)ti (Cri cc-A cafe, poor -tu ll 9 tl irlit rjrar rir N / 4

gip ? ( L' /400 P-Vg • ? -- 7410 11fa r.nrtile, II 5 .. -7420 P 1_14'(412, IT b 12 / ,,1nof 'n 1 IC - X I rt ) - n• i licl , r' vf-I o 19 \-)off )) r - eft, le crwor dAil itv

7ft 51 41 711 -1i) ;id 114115 A A , 0 P vie bz) 1 -, UG I J' ric X71 1 t 4 e

14'/0 VG 57- conwrIn wrivy1F-25r,a'd3, ra ‘Aryq i):-4(fgrq» r.‘or, Wel 15ofF, ew1fil- fficli inclo i rag f'DH;;;J rr- r221; rk ar?,-1-155,V5 7,7-5111114qro,-,1212wt. 3 9 ,

pyrifle-Tirn lec; a q $1P1 le/ mt" 512114 '4D •fr ill 'Fun' v/Xml- -e-i ri 4- -,1) ,,- tyv 5, fr-bni 7 /15o IA, -,,crp q n j jig wiftvir'il IF- 1.15 g pc-Fri- of

40 red-120R 7460 VS 57 rila N5 57 buffiriulirir v __ (2__, well 544 efriq giqUQ'fb It kr/ (Aral -lo /1/55

WNW 4" }? e t r • ; ore, . = e. 0 €4,5)(111 WI( cii,:.5,mci 14

r i A i A ar Trh•rinvill kr! g - a 181C -kflY51

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4 I u w EENE SNEIT 7490 F cm? >si-11, dr H,cm3.1 d

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. 757.0 F-VG 55 wq 55 ho lu an.1-16:5obniii ,vvittor -(rig, 34 iwtrifj- rap pore N5

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Form HE -GET GEOLOGIST 04`442."

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LITHOLOGV

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SAMPLE DESCRIPTION DEPTH

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SHOWS

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WELL NAME Ch.P.Yrer-s0 N I Zubro4 LOCATION SWk N ̀15re.)F177..2 I =1 Corcnr, Cnortv 5noti , Dne:0-Y)

PAGE I.5 OF JJ

DATE

Form HE-GET GEOLOGIST

C

/11 iterrifr2 <1


Chevron-SONAT #1 Zubrod

CORE #1 5022 - 5082 - CUT 60 FEET, RECOVERED 60 FEET

5022 - 5029 Anhydrite; light gray, cryptocrystalline, hard.

5029 - 5030.3 Anhydrite; medium to light gray and buff, cryptocrystalline, hard, with few irregular, isolated inclusions of Dolomite, buff, microcrystalline, poor intercrystalline porosity, medium hard, slow weak cut, no fluorescence.

5030.3 - 5031 Anhydrite; medium gray, cryptocrystalline, hard, hydrocarbon odor.

5031 - 5032 Anhydrite; buff, cryptocrystalline, hard, with irregular inclusions and seams to 1/2 inch thick of Dolomite; buff, microcrystalline, poor inter-crystalline porosity, medium hard, quick yellow cut, strong odor, no fluorescence, trace spotted light stain, leaves yellow ring in dish.

5032 - 5033 Anhydrite; buff to light gray.

5033 - 5034.7 Anhydrite; medium to light gray, and buff, and light brown.

5034.7 - 5035 Dolomite; buff, microcrystalline, poor intercrystalline porosity, medium hard, quick yellow cut, strong odor, trace spotted light stain, leaves yellow ring in dish.

5035 - 5038.8 Anhydrite; light brown, buff, light gray, and white, cryptocrystalline, hard.

5038.8 - 5039 Dolomite; cream, microcrystalline, poor intercrystalline porosity, medium hard, slow, pale white cut, no fluorescence, no stain, intercalated with Anhydrite; light gray to buff.

5039 - 5040.8 Anhydrite; light gray to buff.

5040.8 - 5041 Limestone, and dolomitic Limestone; buff to cream, micro to fine detrital, matrix microcrystalline, and chalky, fair intercrystalline, interfragmental, and chalky porosity, gypsiferous, weak, pale cut, no fluorescence, no visible stain.

5041 - 5042 Limestone, light brown to buff, micro to coarse detrital-fossiliferous, matrix microcrystalline, dense to poor intercrystalline porosity, medium hard, very gypsiferous with many fine to coarse brown gypsum crystals, weak, white cuts, no fluorescence, no visible stain.

Helton Engineering & Geological Services, Inc. Chevron-SONAT #1 Zubrod Core Page

#1 2.

5042 - 5043

5043 - 5044

5044 - 5046

5046 - 5047

5047 - 5049

5049 - 5050

5050 - 5051

5051 - 5052

5052 - 5053

Limestone; as above, dense, medium hard, no show in matrix, core breaks on numerous near horizontal planes spaced 1/4 to 1/2 inch apart, with live stain, quick yellow cut, strong odor, no fluorescence.

Limestone; as above, with brown gypsum crystals as above, trace pale white cut, intercalcareous with Anhydrite, buff to white, cryptocrystalline, medium hard.

Anhydrite; buff, cryptocrystalline, hard.

Anhydrite; buff, cryptocrystalline, hard inter-calcareous with Limestone, buff to cream, micro-crystalline, chalky, grading to micro to fine detrital, matrix microcrystalline to chalky, gypsiferous, dense to poor intercrystalline porosity, medium hard, strong odor, weak, pale white cuts, no fluorescence, no visible stain.

Limestone; buff, very fine to coarse grained detrital-fossiliferous, matrix microcrystalline, very gypsiferous, poor to fair intercrystalline porosity, medium hard, much secondary gypsum infill in previous voids, no show.

Limestone; cream, microcrystalline, dense, chalky, medium hard grades to micro to very fine detrital limestone, matrix chalky, trace pinpoint porosity, gypsiferous, locally mottled medium to light gray, no show.

Limestone; buff, microcrystalline, dense, slightly microdetrital, medium hard, odor, very slow, very weak pale, white cuts, no streamers, no fluorescence, no visible stain.

Limestone; medium to light brown, microcrystalline, dense, grades to micro to very fine detrital, matrix microcrystalline, dense, medium hard, inter-bedded with seams to 1/4 inch thick of dark gray, very argillaceous, microcrystalline, dense Lime-stone, pale white cuts, no fluorescence, no visible stain, odor.

Limestone; medium to light brown, micro to coarse detrital, matrix microcrystalline, laminated with many parts of dark brown microcrystalline, Limestone; medium hard, strong odor, quick yellow white cuts, no fluorescence, poor intercrystalline porosity, scattered stain, scattered specks black, dead oil.


#1 3.

5053 - 5054

5054 - 5055

5055 - 5056

5056 - 5057

5057 - 5058

5058 - 5059

5059 - 5060

5060 - 5061

5061 - 5062

5062 - 5063

Limestone; as above, with shows as above, few streamers, no fluorescence, strong odor, scattered stain, interbedded with Limestone; buff, micro to very fine detrital, matrix microcrystalline, poor intercrystalline porosity, medium hard, scattered specks black, dead oil.

Limestone; buff, micro to very coarse grained detrital, matrix microcrystalline, fair to good intercrystalline and interfragmental porosity, very gypsiferous, very weak, slow, white cut, no fluor-escence, no visible stain, weak odor.

Limestone; as above, weak, pale white cuts, weak odor, no stain, no fluorescence, no streamers,. very fine to coarse grained detrital.

Limestone; as above, with fair to good inter-crystalline and fine vuggy porosity, very weak pale white cuts, weak odor, no stain, no fluorescence.

Limestone; dolomitic, grades to calcareous Dolomite, light brown, microsucrosic, fair intergranular porosity, medium hard, very weak, pale white cuts, no fluorescence, no streamers, no visible stain.

Limestone; dolomitic, grades to calcareous Dolomite as above, slow to quick yellow-white cut with few streamers, no fluorescence, scattered light brown stain, strong odor.

Limestone; dolomitic as above, grades to calcareous Dolomite with fair intergranular porosity, and poor very fine vuggy porosity, weak, yellow-white cuts, no odor, no fluorescence.

Limestone; dolomitic as above, grading to Dolomite, fair intergranular porosity, fair very fine vuggy porosity, medium hard, no show.

Dolomite; as above, very slow, very weak, pale white cuts, no streamers, no fluorescence, no visible stain, no fine vuggy porosity.

Limestone; light brown, micro to fine detrital, matrix microcrystalline to microsucrosic, fair intercrystalline porosity, medium hard, very slow, very weak, pale white cuts, no streamers, no fluorescence, no visible stain.


#1 4.

5063 - 5065

5065 - 5066

5066 - 5067

5067 - 5068

5068 - 5069

5069 - 5070

5070 - 5073

5073 - 5074

5074 - 5078

5078 - 5079

Limestone; light brown to buff, micro to very fine detrital, minor fine detrital, matrix micro-crystalline, poor intercrystalline porosity, very slow, very weak, pale white cut, no streamers, no fluorescence, no visible stain.

Limestone; buff, micro to fine detrital, matrix micro crystalline to minor chalky, poor to fair intercrystalline porosity with show as above.

Limestone; as above, fair to good intercrystalline porosity, few leached corals, with show as above.

Limestone; as above, fair to good intercrystalline porosity, grades to minor Dolomite, and dolomitic Limestone; medium brown, micro to fien detrital, matrix microcrystalline, dense, hard, show as above.

Limestone; dolomitic, grades to Dolomite; light brown, microsucrosic, fair to good intercrystalline porosity, many black carbonaceous Shale specks, show as above.

Limestone; light brown to buff, micro to coarse grained detrital, matrix microcrystalline, poor intercrystalline porosity, slow, weak, pale white cuts, no streamers, no fluorescence, no visible stain, locally laminated with partings of dark crown microcrystalline Limestone.

Dolomite; medium to light gray, brown, microsucrosic, fair to good intercrystalline porosity, medium hard, with few specks of Shale; dark gray, soft, carbonaceous, interval cut by one 80 ° open fracture, no show.

Limestone; dolomitic, medium to light gray-brown, micro to fine detrital, matrix microcrystalline, poor to fair intercrystalline porosity, grades to Dolomite, as above, no show.

Limestone, buff, micro to fine detrital, matrix microcrystalline, minor chalky, poor intercrystalline and chalky porosity, medium hard, very slow, very weak, pale white cut, no streamers, no fluorescence, no visible stain.

Limestone; as above, interval cut by one 85 ° open fracture.

Helton Engineering & Geological Services, Inc. Chevron-SONAT #1 Zubrod Core #1 Page 5.

5079 - 5080 Limestone; light brown, micro to fine detrital, matrix microcrystalline -, poor intercrystalline porosity, medium hard, very slow, very weak, pale white cut, no streamers, no fluorescence, no visible stain, interval cut by one 85° open fracture.

5080 - 5081 Limestone; medium brown as above, with few irregular partings of dark gray, argillaceous, micro-crystalline Limestone, very slow, very weak, pale white cut, few slow streamers, no fluorescence, no visible stain.

5081 - 5082 Limestone; as above, except light brown, and no dark gray Limestone partings as above, very slow, very weak, pale white cut, no streamers, no fluorescence, no visible stain.

Bottom of Core.



CORE #2 6500 - 6560

6500 - 6501

6501 - 6502

6502 - 6503

6503 - 6504

6504 - 6505

6505 - 6506

6506 - 6507

6507 - 6508

6508 - 6509

6509 - 6512

6512 - 6514

- CUT 60 FEET, RECOVERED 60 FEET

Limestone; medium brown-gray, microcrystalline, dense, hard.

Limestone; medium to light gray-brown, and light brown, microcrystalline, dense, fossiliferous, hard.

Limestone; medium brown-gray, microcrystalline, dense, hard.

Limestone; light gray-brown, microcrystalline, dense, fossiliferous, vertical open fracture, hard, no show.

Limestone; medium to light gray-brown, micro-crystalline, dense, hard, few scattered inclusions of gypsum, white, very fine crystalline, vertical open fracture, no show.

Limestone; light gray-brown, fine to very coarse grained detrital, fossiliferous, matrix filled with very fine crystalline gypsum, dense, hard, grades to Limestone, light brown, micro to crypto-crystalline, dense, hard, open vertical fracture, no show.

Limestone; light brown, micro to cryptocrystalline, dense, fossiliferous, hard, open vertical fracture, with fine crystalline gypsum, locally pyritic, scattered inclusions of fine crystalline gypsum, no show.

Limestone; as above, hard, locally with many fine to medium crystalline gypsum crystals, clear, slightly pyritic, no open fractures, grades to fine to coarse detrital, matrix very fine to fine crystalline gypsum, dense, hard.

Limestone; as above, with many irregular healed tight fractures filled with Gypsum.

Limestone; light brown, micro to cryptocrystalline, dense, hard, slightly pyritic, few inclusions of very fine to fine crystalline Gypsum.

Limestone; as above, with numerous irregular, tight, dark gray, microcrystalline, dense Lime-stone partings.


6514 - 6515 Limestone; light brown, micro to fine detrital- fossiliferous, matrix micro to cryptocrystalline, dense, hard, slightly gypsiferous with scattered inclusions of very fine to medium crystalline Gypsum.

6515 - 6517 Limestone; light brown, micro to cryptocrystalline, dense, hard, with few irregular partings of dark gray, microcrystalline, dense Limestone.

6517 - 6518 Limestone; medium gray, microcrystalline, dense, hard, with numerous horizontal dark gray Limestone partings.

6518 - 6519 Dolomite; calcareous, gray-buffm microcrystalline, dense, hard, open vertical fracture, no show.

6519 - 6520 Dolomite; as above, with seams of Dolomite, calcareous, medium gray, microcrystalline, dense, hard, open vertical fracture, no show.

6520 - 6521 Limestone; laminated, medium brown and buff, microcrystalline, fair intercrystalline porosity, slightly argillaceous, soft, no show.

6521 - 6522 Dolomite; calcareous, medium brown, and buff, laminated, microcrystalline to microsucrosic, fair intercrystalline porosity, soft to medium hard, no show.

6522 - 6523

Dolomite; calcareous, buff, very fine crystalline, soft, good intercrystalline, and very fine vuggy porosity, no show.

6523 - 6524 Dolomite; calcareous, buff, microcrystalline, dense, medium hard, slow, very weak, pale white cut, no fluorescence, no streamers, no visible stain, medium hard, no odor.

6524 - 6525 Dolomite; calcareous, mottled gray-buff, and light gray, micro to fine detrital, matrix microcrystalline, poor intercrystalline porosity, and poor pinpoint porosity, scattered dark brown, dead oil stain, slow, very weak, pale white cut, no streamers, no fluorescence, no live stain, no odor, soft.

6525 - 6526 Dolomite; calcareous, buff, very fine crystalline grading to microsucrosic, good intercrystalline porosity, and poor pinpoint porosity, soft, multiple open vertical fractures, no show.

6526 - 6527 Dolomite; as above, with increase in pinpoint porosity, grades to micro to very fine detrital, soft, no show.


6527 - 6528

Dolomite; calcareous, buff, microcrystalline, fair to good intercrystalline porosity, poor pinpoint porosity, soft, no show.

6528 - 6529 Dolomite; calcareous, buff, microcrystalline, to micro to very fine detrital, fair to good intercrystalline porosity, poor pinpoint, anf fine vuggy porosity, trace scattered medium brown dead stain, no cuts, no fluorescence, no live stain, multiple vertical and high angle open fractures.

6529 - 6530 Dolomite; as above, with porosity as above, no cuts, no fluorescence, no live stain.

6530 - 6531 Dolomite; calcareous, buff, micro to very fine detrital, matrix microcrystalline, fair to good intercrystalline porosity, soft, no show.

6531 - 6532 Dolomite; as above, except poor intercrystalline porosity, medium hard, no show.

6532 - 6533 Limestone; buff, microcrystalline, laminated, poor intercrystalline porosity, medium hard, interbedded with Limestone, gray-buff, very fine to coarse detrital-fossiliferous, with inclusions and partings of dark gray, soft, pyritic Shale, matrix chalky, few zones of light gray, hard cryptocrystalline Chert, dense to poor interfragmental porosity, no show.

6533 - 6535 Limestone; gray-buff, micro to very fine detrital, matrix microcrystalline, slightly fossiliferous, poor intercrystalline porosity, medium hard, with numerous, near horizontal laminae of dark gray, microcrystalline Limestone, no show.

6535 - 6536 Limestone; light gray-brown, micro to medium grained, detrital-fossiliferous, matrix micro-crystalline, poor intercrystalline porosity, and poor pinpoint porosity, medium hard, numerous near horizontal laminae of dark gray micro-crystalline Limestone, open vertical fracture, no show.

6536 - 6537 Limestone; mottled, buff, gray-buff, and cream, medium to very coarse detrital-fossiliferous, matrix microcrystalline, numerous Chert inclusions, poor vuggy porosity, scattered medium brown dead oil stain, no cut, no fluorescence, no live stain, fair to good intercrystalline and interfragmental porosity, soft, open vertical fracture.


#2 4.

6537 - 6538

6538 - 6539

6539 - 6540

6540 - 6541

6541 - 6543

6543 - 6544

6544 - 6545

6545 - 6546

6546 - 6547

6547 - 6548

6548 - 6550

6550 - 6551

6551 - 6552

Limestone; light brown, - micro to medium detrital, fossiliferous, matrix microcrystalline, dense, hard, with numerous, near horizontal laminae of dark gray, microcrystalline Limestone, no show.

Limestone; as above, becoming fine to medium crystalline, poor intercrystalline porosity, hard, with numerous, near horizontal laminae of dark gray, microcrystalline Limestone, no show.

Limestone; as above, dense, hard.

Limestone; as above, dense to scattered fine vuggy porosity, hard, no show.

Limestone; as above, dense to trace fine vuggy porosity, hard, no show.

Limestone; as above, gypsiferous, hard, no show.

Limestone; buff, fine to medium detrital, matrix microcrystalline, scattered poor, coarse, vuggy porosity, with secondary Quartz crystals, no show.

Limestone; as above, grading to Limestone; micro-crystalline, dense, hard.

Limestone; light gray-brown, and buff, fine to coarse detrital, matrix microcrystalline, very pyritic, poor to fair intercrystalline and fine vuggy porosity, locally grades to fine to medium grained crystalline, calcite, very gypsiferous, soft, no show.

Limestone; as above, buff to cream, very gypsif-erous, poor intercrystalline, and fine vuggy porosity, numerous inclusions of fine to very coarse crystalline Gypsum, hard, no show.

Limestone; as above, dense, hard.

Limestone; as above, dense, to trace poor pinpoint porosity, hard.

Limestone; medium to light brown, fine to medium detrital, matrix microcrystalline to chalky, scattered coarse vugs to 1 inch maximum, partly filled with very coarse crystalline Calcite and Gypsum crystals, fair intercrystalline and vuggy porosity, soft, slightly argillaceous, no show.


#2 5.

6552 - 6553

6553 - 6554

6554 - 6556

6556 - 6559

6559 - 6560

Limestone; as above, very gypsiferous, except decrease in vuggy porosity, no show.

Limestone; light brown, fine to medium grained detrital, matrix microcrystalline, dense, hard, open vertical fracture, no show.

Limestone; as above, dense, hard, with medium gray, mottling, open vertical fracture, no show.

Limestone; light brown, cryptocrystalline, fossili-ferous, with scattered fine crystalline Gypsum, dense, hard.

Limestone; light brown, fine to medium detrital, fossiliferous, matrix microcrystalline to chalky, dense, very gypsiferous, hard.



- CUT 56 FEET, RECOVERED 56 FEET CORE #3 6560 - 6616

6560 - 6561

6561 - 6562

6562 - 6563

6563 - 6564

6564 - 6565

6565 - 6566

6566 - 6567

6567 - 6569

6569 - 6570

Limestone; light brown, buff, very fine to coarse grained detrital, matrix microcrystalline, dense, grades to Limestone, microcrystalline, dense, hard, numberous inclusions and fracture fill of Calcite, clear, fine crystalline.

Limestone; buff, micro to cryptocrystalline, dense, hard, numerous inclusions and fracture fill of Calcite, clean, fine crystalline, styolitic surface, with black mineral residue.

Limestone; light brown, fine to coarse grained detrital, very fossiliferous, matrix micro-crystalline, dense, hard, with numerous inclusions and fracture fill of Calcite, clear, fine crystalline.

Limestone; medium to light brown, cryptocrystalline, slightly fossiliferous, dense, hard, with numerous inclusions and fracture fill of Calcite, clear, fine crystalline, styolitic surface with black mineral residue.

Limestone; medium brown, cryptocrystalline, dense, hard, with numerous inclusions and fracture fill of Calcite, clear, fine crystalline.

Limestone; medium brown and buff, cryptocrystalline, dense, hard, grading to Limestone, medium gray, microcrystalline, dense, hard, numerous inclusions and fracture fill of Calcite, clear, fine crystalline, styolitic surface with black mineral residue.

Limestone; medium brown and light gray-brown, micro to cryptocrystalline, dense, grading to Limestone, fine to coarse detrital, matrix microcrystalline, dense, slightly fossiliferous, hard.

Limestone; light brown, fine to coarse detrital, slightly fossiliferous, matrix microcrystalline, dense, hard, few inclusions of fine to medium crystalline clear Calcite, styolitic surface with black mineral residue.

Limestone; as above, intercalated with Limestone, medium to light brown and light gray, crypto-crystalline, hard.


#3 2.

6570 - 6571

6571 - 6572

6572 - 6573

6573 - 6574

6574 - 6575

6575 - 6576

6576 - 6577

6577 - 6578

6578 - 6579

6579 - 6580

6580 - 6581

Limestone; medium to light gray-brown, and light brown, microcrystalline, dense, hard, grades to Limestone, fine to medium detrital, matrix micro-crystalline, dense, hard, interval cut by one high angle, open fracture, no show.

Dolomite; calcareous, buff, microcrystalline, poor intercrystalline porosity, medium hard, locally with light gray banding, no show.

Dolomite; calcareous, buff, cream, and very light gray, microsucrosic, fair intercrystalline porosity, soft, looks wet, grades to microcrystalline, dense, medium hard, styolitic surface with black mineral residue, no show.

Dolomite; calcareous, buff and very light gray, and gray-buff, microsucrosic to microcrystalline, poor intercrystalline porosity, soft, looks wet, no show.

Dolomite; calcareous, cream and buff, microsucrosic, fair intercrystalline porosity, soft, looks wet, no show.

Dolomite; calcareous as above, with good inter-crystalline porosity, and poor very fine vuggy porosity, soft, looks wet, no show.

Dolomite; calcareous, buff, with brown banding, microsucrosic, fair intercrystalline porosity, soft, looks wet, no show.

Dolomite; buff and gray-buff, and light brown, microsucrosic, fair intercrystalline porosity, soft, looks wet, no show.

Dolomite; as above, grading to very fine crystalline, fair intercrystalline porosity, soft, grading to Limestone, buff, microcrystalline, dense, medium hard, no show.

Limestone; medium to light brown and buff, micro-crystalline, poor to fair intercrystalline porosity, poor fine to coarse vuggy porosity, medium hard, no show.

Dolomite; slightly calcareous, buff, micro-crystalline, dense, hard, with one vertical, open fracture, no show.


#3 3.

6581 - 6582

6582 - 6583

6583 - 6584

6584 - 6585

6585 - 6586

6586 - 6588

6588 - 6589

6589 - 6592

6592 - 6593

6593 - 6594

6594 - 6595

6595 - 6596

Limestone; light brown, - microcrystalline, dense, hard, few round, gray Chert nodules to 1/2 inch maximum, styolitic surface, with black mineral residue.

Limestone; light brown, cryptocrystalline, hard, styolitic surface with black mineral coating.

Limestone; dolomitic, laminated, medium to light brown, buff and cream, microcrystalline, dense, hard, with partings and seams to 1/8 inch of dark gray, Shale, scattered dark brown, dead stain, pale white cuts, no fluorescence, no streamers, no live stain, looks wet.

Limestone; dolomitic, cream and buff, micro-crystalline, chalky, soft, slightly very fine vuggy, poor chalky porosity, looks wet, no show.

Dolomite; calcareous, cream, microcrystalline, dense, hard, looks wet, few close spaced bedding planes coated with dark brown residue, possible dead stain, no show.

Limestone; very dolomitic, grades to calcareous Dolomite; cream, microcrystalline, dense, slightly chalky, hard grades to cryptocrystalline, hard, with one vertical open fracture, no show.

Dolomite; calcareous, banded buff and gray-buff, microcrystalline, dense,hard with one vertical open fracture, no show.

Limestone; as above, with one vertical open fracture, few horizontal tight partings with brown coating, possible dead stain, no show.

Limestone; dolomitic and calcareous Dolomite; cream, microcrystalline, dense, laminated, with many close spaced horizontal dark brown partings.

Limestone; as above, with black, hard mineral residue on bedding planes.

Limestone; as above, with one vertical open fracture, no show.

Limestone; as above, with one vertical open fracture, few irregular tight surfaces with black mineral coating, no show.


#3 4.

6596 - 6598

6598 - 6599

6599 - 6600

6600 - 6601

6601 - 6602

6602 - 6604

6604 - 6607

6607 - 6608

Limestone; as above, with few close spaced bedding planes coated with dark brown residue, possible dead stain, few slow, weak, pale white cuts, from latter, no streamers, no fluorescence, no live stain.

Limestone; buff, micro to find detrital, matrix microcrystalline, dense, hard, with scattered fine vugs to 1/8 inch maximum, interval cut by multiple open vertical fractures, core in small fragments, no show.

Dolomite; calcareous, buff, very fine to fine detrital, very good interfragmental and fine vuggy porosity, soft, no show.

Limestone; dolomitic, buff, microcrystalline, dense, laminated, grades to Limestone, buff, micro to very fine detrital, matrix microcrystalline, medium hard, dense, many close spaced, horizontal bedding planes, and low angle fractures coated with dark brown and dark gray residue, possible dead stain, slow, weak, pale white cuts, from latter fragments.

Limestone; as above, with close spaced horizontal bedding planes, and incipient fractures coated with dark brown residue, possible dead stain, slow, weak, pale white cuts from fragments with dark brown residue, no streamers, no fluorescence, no live stain.

Limestone; as above, with poor intercrystalline porosity, and trace very fine vuggy porosity, medium hard, few fossil imprints, no show.

Dolomite; calcareous, buff, very fine to fine detrital, fossiliferous, soft, chalky, fair to good interfragmental and very fine to very coarse vuggy porosity, vugs up to 1/2 inch maximum, no show.

Limestone; dolomitic, laminated, light brown and buff, cream, microcrystalline, dense, hard, with close spaced near horizontal bedding planes coated with dark brown residue, possible dead stain, slow, weak, white cuts from fragments with the dark brown residue, matrix dense, no streamers, no fluorescence, no live stain.


#3 5.

6608 - 6609

6609 - 6611

6611 - 6612

6612 - 6613

6613 - 6615

6615 - 6616

Limestone; locally dolomitic, cream micro-crystalline, dense, chalky, poor pinpoint porosity, medium hard, no show.

Limestone; as above, with multiple high angle and vertical open fractures, core in small fragments, many scattered specks black mineral, no show.

Limestone; cream, very fine detrital, matrix chalky, fair to good interfragmental porosity and chalky porosity, trace fine vugs, grades to micro-crystalline, dense, medium hard, scattered dark brown, dead stain along irregular hairline fractures, weak, pale white cuts, no streamers, no fluorescence, no live stain, interval cut by one 45 ° open fracture, no show on latter open fracture.

Limestone; as above, except no dead stain as above, no show.

Limestone; as above, with minor light brown and buff banding, few fine vugs with secondary calcite and gypsum crystals, no show.

Limestone; as above, with inclusions of calcite and gypsum, clear, fine to medium crystalline, and dark brown-gray mineral deposition styolitic surface, no show.



CORE #4 7220 - 7280 - CUT 60 FEET, RECOVERED 45.7 FEET

7220 - 7229 Shale; medium gray-green, medium hard.

7229 - 7230 Shale; as above, with few irregular inclusions of sandstone, very fine grained, subangular to subrounded, very shaly, tight.

7230 - 7234.7 Shale; medium gray-green, medium hard.

7234.7 - 7235 Sandstone; dull white, very fine grained, poor intergranular porosity, slightly calcareous, dolomitic, slightly glauconitic, in seams 1/2 inch maximum with laminae of Shale, medium gray-green, 1/8 to 1/4 inch thick, medium hard.

7235 - 7236 Sandstone; as above, with seams of Dolomite, slightly calcareous, buff to pale green, micro to very fine crystalline, locally very fine sandy, poor intercrystalline porosity, medium hard with laminae of Shale, light green, firm, 1/8 to 1/4 inch thick, no show.

7236 - 7238 Sandstone; very light gray-green, very fine grained, glauconitic, angular to subangular, firm, fair intergranular porosity, no show, with laminae of Shale, light green, firm, 1/8 to 1/4 inch thick, no show.

7238 - 7239 Sandstone; as above, with inclusions of Sandstone speckled green and very light gray, very fine grained, angular to subangular, very glauconitic, friable, very good intergranular porosity, with laminae of Shale, light green, firm, 1/8 to 1/4 inch thick, trace cross bedding, no show.

7239 - 7240 Sandstone; as above, with irregular seams of Dolomite. pale green to buff, microcrystalline, dense, medium hard, with laminae of Shale, light green, firm, 1/8 to 1/4 inch thick, trace cross bedding, no show.

7240 - 7241.7 Sandstone; as above, with irregular seams of Dolomite, calcareous, fine to medium crystalline, very glauconitic, good intercrystalline porosity, medium hard, grading to Dolomite, buff, pale green and very light gray, microcrystalline, dense, medium hard, trace cross bedding, no show.

7241.7 - 7265.7

Sandstone; very light gray to dull white, fine to medium grained, subrounded, very friable, very good intergranular porosity, water wet, no show, (contaminated with pipe dope by rough-necks).


Chevron-SONAT #1 Zubrod SW NE Section 18: T22N - R21E Corson County, South Dakota

GEOLOGICAL SUMMARY

Primary objectives of the subject well were the Mission Canyon

MC-3 zone, the Ordovician Red River zones, and the Cambrian Deadwood

sandstone. Cores were cut in parts of the above intervals. The

Mission Canyon MC-3 zone as well as the Red River A, B, and C zones

were drill stem tested. Secondary objectives of the subject well

were porous zones in the Pennsylvanian Minnelusa formation, the

Mississippian Charles and Mission Canyon MC-1 intervals, the Devonian

Nisku, and Duperow formations, the Silurian Interlake formation, and

the Ordovician Gunton formation.

Core #1 was cut in the MC-4 and MC-3 zones of the Mission Canyon

formation from 5022 to 5082 feet (drilling time depths), with full

recovery. Based upon drilling time depths the MC-4 was picked at

5005 feet, and the MC-3 at 5047 feet. These tops are approximately

seven feet low to Schlumberger tops, but this is due to depth errors

of the geolograph. Core #1 adjusted to Schlumberger logs would be

from 5027 to 5087 feet. The cored interval from 5022 to 5047 in the

MC-4 consisted of dense Anhydrite containing a few small inclusions,

partings, and thin seams of a microcrystalline Dolomite marked by

poor intercrystalline porosity. This Dolomite produced weak to strong

cuts, and exhibited traces of spotted live stain. A strong hydrocarbon

odor was present in the Dolomite. Core analysis in the Dolomite showed

permeabilities ranging between .01 and .16 millidarcys, porosities

between 1.8 and 2.4 per cent, and total water between 63.9 and 74.6

per cent.

Helton Engineering & Geological Services, Inc. Chevron-SONAT #1 Zubrod Geological Summary Page 2.

Core analysis in the MC-3 from 5047 to 5082 feet demonstrated

fair to good permeabilities and porosities in the porous limestones and

dolomites with high water saturation. With the exception of three

separate feet, residual oil saturation was low and varied between 0.5

and 11.2 per cent. Residual oil saturation from 5051 to 5052, 5056 to

5057, and from 5076 to 5077 measured 33.4, 25.2, and 19.0 per cent

respectively. The latter high saturations were marked by low

permeabilities and porosities. The interval from 5057 to 5063 feet

displayed good reservoir characteristics, as permeabilities ranged

between 11 and 48 millidarcys, and porosities ranged between 18.8 and

31.5 per cent. This interval is made up of a micro sucrosic Dolomite,

and exhibited high water saturation ranging between 71.2 and 93.1

per cent. Core examination at the wellsite produced slow to quick

yellow-white cuts. Traces of scattered light brown live oil stain

were observed. Below 5059 feet only slow, weak, pale white cuts were

produced. Much of the core gave off a strong hydrocarbon odor. Drill

stem test #1 from 5030 to 5082 feet covered the top 35 feet of the Mc-3

Limestone. Test recovery consisted of 3416 feet of fresh water. Nitrates

in the recovery water measured 40 ppm, while mud nitrates measured

250 ppm.

Core #2 was cut from 6500 to 6560 feet (drill time depth), and

included the Red River A zone and all except the bottom 10 feet of

the B zone (drilling time depths) with full recovery. Based upon

drilling time depths, the Red River A zone was picked at 6496 feet,

and the B zone at 6516 feet. These tops are approximately 4 feet high

to Schlumberger tops. Core #2 adjusted to Schlumberger depths would

extend from 6504 to 6564 feet.


Core analysis from 6500 to 6518 feet in the A zone demonstrated

very poor porosities and permeabilities. With the exception of two

feet, permeabilities averaged only .01 or less millidarcys, with

porosity ranging from .7 to 4.8 per cent. Water saturation ranged

between 17.8 and 89.3 per cent. No live oil shows were observed

within the interval by the wellsite geologist.

Core analysis from 6518 to 6532 feet in the B zone demonstrated

the presence of fair to good permeabilities and porosities. Permeability

ranged between .01 to 234 millidarcys, while porosities ranged between

5.7 and 32.8 per cent. Water saturation ranged between 59.1 and 92.9

per cent. Oil saturation ranged between 0.0 to 3.1 per cent with one

foot at 6521 feet exhibiting 22.1 per cent. Core examination by the

wellsite geologist produced a few, slow, weak, pale white cuts at

6523 to 6525 feet. No fluorescence or live stain was detected. Traces

of dark brown, dead oil stain were observed at 6524 to 6525 feet and

6528 to 6529 feet.

Core #3 was cut from 6560 to 6616 feet, or 6564 to 6620 feet on

the Schlumberger log. The Red River C zone was picked at 6570 feet

on drilling time depth.

With the exceptions of the intervals from 6574 to 6578 feet,

6598 to 6600 feet, and 6607 feet, permeabilities were low in the C

zone, and ranged between .01 to 5.3 millidarcys. The interval

6574 to 6578 feet displayed permeabilities ranging from 10 to 64

millidarcys, porosity ranging between 19.6 to 26.2 per cent, but with

high water saturation ranging between 69.9 to 90.1 per cent. Oil

saturation ranged between 0.7 and 1 per cent. The interval from

6598 to 6600 feet showed permeabilities from 12 to 13 millidarcys,


porosities from 16.7 to 16.9 per cent, but with high water saturation

ranging between 77.6 and 81.9 per cent. Oil saturation here was 1.2

per cent.

Core examination by the wellsite geologist produced slow, weak,

pale white cuts at 6583 to 6584 feet, 6596 to 6598 feet, 6600 to 6602

feet, 6607 to 6608 feet, and 6611 to 6612 feet. These cuts were

usually associated with scattered dark brown, dead oil stain. No

fluorescence or live oil stain was observed in the core. Drill stem

test #2 - 6490 to 6616 feet covered the Red River A, B, and C zones.

Recovery consisted of 5750 feet of salt water.

Core #4 was cut from 7220 to 7280 feet, with the Deadwood sand

picked at 7236 feet on drilling time. Core adjusted to Schlumberger

would be from 7223 to 7283 feet. Core analysis demonstrates the

sandstone to contain very good permeabilities and porosities. From

7242 feet down, permeabilities range between 5.1 to 2630 millidarcys

with porosities ranging between 5.6 to 23.7 per cent. Water saturation

ranged between 54.1 to 87.2 per cent. No oil was measured in the core.

Core examination by the wellsite geologist disclosed no hydrocarbon

shows. The sand was not drill stem tested.

No shows were observed in the secondary objectives of the subject

well.

Steel line measurement at 5082 feet board depth indicated a 10

foot upward depth correction was required. After Core #1 and after

DST #1, hole depth was corrected 10 feet upward to 5072 feet.


At a depth of 5753 feet, in the lower Lodgepole, all mud

was lost (700 barrels).

A two man Tooke logging unit was in operation from base of

surface casing to total depth, Ralph Earl and P. H. McCance,

operators.

Thirty foot samples were caught down to a depth of 3520 feet.

Below 3520 feet, ten foot samples were caught.


DAILY DRIL,LING REPORT (As OF / :00 AM)

WELL Chevron-SONAT #1 Zubrod

DEPTH 610' FEET MADE OPERATION Waiting on cement.

SURVEY

DAY NO. 1 DATE Dec. 31, 1979 610

HRS. ON BOTTOM

5 3/4

610' 3/4°

LAST PIPE TALLY 621.16 BOARD 619.37 CORRECTION: YES NO X

WT OF STRING M LBS. 52 WT ON BIT M LBS ROTARY RPM

PUMP No 1 National C-350 IN USE X LINERS 5 1/2 x 18 SPM PRESS PUMP No 2 National C-250 IN USE LINERS 5 1/2 x 16 SPM PRESS DRILL PIPE OD 4 1/2 THD XH DRILL COLLARS OD 6 1/2 THD H-90 No. IN HOLE BOTTOM. HOLE ASSEMBLY

BIT NO. SIZE TYPE

DEPTH

IN

DEPTH

OUT

FT.

MADE

TOTAL

HRS. RUN

JET SIZE

IN 32nds

COND

REMARKS T B G 1-A 12 1/4 DS Surface 610 610 5 3/4 13 13 15

Ream Bit No.

Core

No.

FEET CUT FEET REC.

MUD - Water WT VIS WL GEL FC

Hrs. Run IN OUT

DESILTER LB/GAL PH APP VIS PLAS VIS YLD PT DESANDER LB/GAL WATER OIL CL-- PPM DEGASSER LB/GAL SOLIDS SAND CA + + PPM COMPRESSOR DATA MUD DUMPED bbl AV NV d-exp Pore Press OUTPUT cfm Press. psic MUD ADDED MAKE RATING

DAILY MUD COST

RIG TIME

1. Drilling 5 3/4 2. Tripping 1

3. Service & BOPs

4. Reaming

5. Slip & Cutline

6. Surveying 1/4 11. Coring

7. Circulating 4 12. Testing

8 Clean to Btm 13. Logging

9. Cond. Mud 14. Casing 3/4

OTHERS (SPECIFY)

IS Rigging Up to Run Casing 1/2 17 Hooking Up Halliburton 18 Head - 1 1/2 ig Cementing - 3/4

10. Repairing 15. WOC 1 1/2 20 Rigging Up - 8 DRILLING & GEOLOGICAL REMARKS (Time & Sequence of Operations to be inserted below)

Rigged up. Spudded hole at 3:00 P.M., December 30, 1979. Drilled 12 1/4" surface hol w; h B;t #1 -A to 610 feet Circulated Tripped out SLM 621 16 Board 619 37 Rigged ilp to run rasing. Ran 15 ioints of 9 5/8", STC, 36# casing at 609 feet. Total feet 598. Hooked up Halliburton head and circulated. Cemented casing with

_ao(lsackstthnSalcaumc nLhloridead14#F1ocele.Waitedoncement.

Well Costs

Daily

Cumulative

John H. Hughes Supervisor WEATHER: TEMP. ° F

Form HE-D1

Well Costs

Daily

Cumulative


DAILY DRILLING REPORT 1AS OF 7 : 00 AM)

WELL Chevron-SONAT 1/1 Zubrod

DEPTH 1022'

FEET MADE OPERATION

SURVEY S

DAY NO. 2 DATE Jan. 1, 1980

412

HRS. ON BOTTOM Drilling

5 3/4

LAST PIPE TALLY 621.16 BOARD 619.37 CORRECTION:

RPM ROTARY

YES NO X WT OF STRING M LBS. WT ON BIT M LBS 25 PUMP No 1 National C-350 IN USE X LINERS 5 1/2 x 18 SPM 52 PRESS 1050

PUMP No.2 National C-250 IN USE LINERS 5 1/2 X 16 SPM PRESS DRILL PIPE OD 4 1/2 THD XH DRILL COLLARS OD 6 1/2 THD 11-90 No. IN HOLE

BOTTOM HOLE ASSEMBLY

BIT NO. SIZE TYPE

DEPTH

IN

DEPTH

OUT

FT.

MADE

TOTAL

HRS. RUN

JET SIZE

IN 32nds

COND

REMARKS T B G

1 7 7/8 SDS 610 412 5 3/4 13 13 13

Ream Bit No.

Core

No.

FEET CUT FEET REC.

MUD - Water WT VIS WL GEL FC

Hrs. Run IN OUT

DESILTER LB/GAL

PH APP VIS PLAS VIS YLD PT DESANDER LB/GAL

WATER OIL CL-- PPM DEGASSER LB/GAL

SOLIDS SAND CA + + PPM COMPRESSOR DATA MUD DUMPED bbl AV NV d-exp Pore Press OUTPUT cfm Press. psic

MUD ADDED MAKE RATING

DAILY MUD COST

6 Surveying 11 Coring

7. Circulating 12. Testing

8. Clean to Btm 13. Logging

9. Cond. Mud 14. Casing

10. Repairing 15. WOC 5 DRILLING & GEOLOGICAL REMARKS (Time & Sequence of Operations to be inserted below)

RIG TIME

1. Drilling 5 3/4

2. Tripping 1

3. Service & BOPs

4. Reaming

5. Slip & Cutline

OTHERS (SPECIFY)

16 Cutting Off Casing - 1/2

17 Nippling Up - 7

18 Pressuring Up - 2 3/4

19 Testing BOP - 2

20

Waited on cement. Cut off casing. Nippled up. Pressured up and tested. Tested athatla(Lial,Ta&ttipe rams and blind rams at 3000 psi. Finished

124411ingaill......._Thipperl in hole with Bit 111 and drilled plug, & drilled to 1022 feet

WEATHER: TEMP. ° F

Form HE-D1

Supervisor John H. Hughes

$ Well Costs

Daily

Cumulative


DAILY DRILLING REPORT (AS OF

WELL Chevron-SONAT ill Zubrod

7:00 AM)


DEPTH 2990' FEET MADE 1968 HRS. ON BOTTOM 19 1/2

OPERATION Drillin

SURVEY 1084' 1/2° 1579' 1/ 4° 2012' 1/ 2° 2758' 1/2 °

LAST PIPE TALLY 621.16 BOARD 619.37 CORRECTION: YES X

NO

WT OF STRING M LBS. 84 WT ON BIT M LBS 25 ROTARY RPM 160 PUMP No, 1 National C-350 IN USE X LINERS 5 1/2 x 18 SPM 52 PRESS 1050 PUMP No 2 National C-250 IN USE LINERS 5 1/2 x 16 SPM PRESS

DRILL PIPE OD 4 1/2 BOTTOM HOLE ASSEMBLY

THD XH DRILL COLLARS OD 6 1/2 THD 11-90 No. IN HOLE 12

BIT NO. SIZE TYPE

DEPTH

IN

DEPTH

OUT

FT.

MADE

TOTAL

HRS. RUN

JET SIZE

IN 32nds

COND

REMARKS T B G

1 7 7/8 SDS 610 2106 1496 12 13 13 13 2 7 7/8 FDT 2106 884 13 1/4 13 13 13

Ream Bit No.

Core

No.

FEET CUT FEET REC.

MUD — Water WT VIS WL GEL FC

Hrs. Run IN OUT

DESILTER LB/GAL



SOLIDS SAND CA + + PPM COMPRESSOR DATA MUD DUMPED bbl

AV NV d-exp Pore Press OUTPUT dm Press. psic


DAILY MUD COST

RIG TIME

1. Drilling 19 1/2 6. Surveying

2. Tripping 3 1/4 7. Circulating

3. Service & BOPs 1/4 8 Clean to Btm

4. Reaming 9. Cond. Mud

5. Slip & Cutline 10. Repairing

1 OTHERS (SPECIFY)

11 Coring 16

12. Testing 17.

13 Logging 18

14. Casing 19

15. WOC 20

DRILLING & GEOLOGICAL REMARKS (Time & Sequence of Operations to be inserted below)

Drilled with Bit No. 1 from 1022 to 2106 feet, and tripped out. Tripped into hole with Bit No. 2. Washed to bottom and drilled from 2106 to 2990 feet.

WEATHER: TEMP. °F

Form HE-D1


OTHERS (SPECIFY)

16 Cleaning Mud Tank - 1/2

17

18

19


DAILY DRILLING REPORT (As oF 7:00 AM)

WELL Chevron-SONAT #1 Zubrod DAY NO. 4 DATE Jan. 3, 1980 DEPTH 3726 ' FEET MADE 736 HRS. ON BOTTOM 17 OPERATION

SURVEY S

Drillin

LAST PIPE TALLY

WT OF STRING

PUMP No 1

PUMP No 2

DRILL PIPE

3720' 3/4 0 621.16 BOARD 619.37 CORRECTION: YES NO X

M LBS. 25 WT ON BIT M LBS 25 ROTARY

SPM

RPM 62 National C-350 IN USE X LINERS 5 1/2 x 18 52 PRESS 1000 Nati onal C-250 IN USE LINERS 5 1/2 X 16 SPM PRESS

OD 4 /7 THD XH DRILL COLLARS OD 6 1/2 THD II-90 No. IN HOLE15

BIT NO. SIZE TYPE

DEPTH

IN

DEPTH

OUT

FT .

MADE

TOTAL

HRS. RUN

JET SIZE

IN 32nds

COND

REMARKS T B G

2 7 7/8 FDT 2106 3720 1614 28 1/4 13 13 13 3 7 7/8 F2 3720 6 2 12 12 12

Ream Bit No.

Core

No.

FEET CUT FEET REC.

MUD 8.9 32

WT VIS WL GEL FC

Hrs. Run IN OUT

DESILTER LB/GAL


WATER OIL CL- - PPM DEGASSER LB/GAL

SOLIDS SAND CA + + PPM COMPRESSOR DATA MUD DUMPED bbl AV NV d-exp Pore Press OUTPUT cfm Press psig MUD ADDED 41 Gel, 8 Rayvan, 1 Caustic, 11 Unidrill MAKE RATING

DAILY MUD COST

RIG TIME

1. Drilling 17 6 Surveying 1/2 11. Coring

2. Tripping 5 7. Circulating 12. Testing

3. Service & BOPS 1/2 8. Clean to Btm 13. Logging

4. Reaming 1/2 9 Cond. Mud 14. Casing

5. Slip & Cutline 10. Repairing 15. WOC 20


Drilled with Bit No. 2 from 2990 to 3720 feet, cleaned mud tank. Tripped out of hole. Check BOP. Tripped into hole with Bit No. 3, reamed 30 feet to bottom, and drilled from 3720 to 3726 feet.

Well Costs

Daily

Cumulative

WEATHER: TEMP.

Form HE-D1

°F

Supervisor: John H. Hughes


DAILY DRILLING REPORT (ASOF 7.00 AM)

WELL Chevron-SONAT # 1 Zubrod DAY NO. 5 DATE Jan. 4, 1980

DEPTH 4164' FEET MADE 438 HRS. ON BOTTOM 21 1/2 OPERATION Drilling

SURVEY

LAST PIPE TALLY 621.16 BOARD 619.37 CORRECTION: YES NO X WT OF STRING M LBS 114 WT ON BIT M LBS 32 ROTARY RPM 65 PUMP No 1 National C-350 IN USE X LINERS 5 1/2 x 18 SPM 50 PRESS 1000

PUMP No 2 National C-250 IN USE LINERS 5 1/2 x 16 SPM PRESS DRILL PIPE OD 4 1/2 THD XH DRILL COLLARS OD 6 1/2 THD N-90 No. IN HOLE 15 BOTTOM HOLE ASSEMBLY

BIT NO. SIZE TYPE

DEPTH

IN

DEPTH

OUT

FT.

MADE

TOTAL

HRS. RUN

JET SIZE

IN 32nds

COND

REMARKS T B G

3 7 7/8 F2 3720 444 23 1/2 12 12 12

Ream Bit No.

Core

No.

FEET CUT FEET REC.

MUD

WT 9 VIS 32 WL

9.8 GEL FC

Hrs. Run IN OUT

DESILTER LB/GAL

PH APP VIS PLAS VIS YLD PT DESANDER LB/GAL WATER OIL CL-- PPM DEGASSER LB/GAL

SOLIDS SAND CA + + PPM COMPRESSOR DATA MUD DUMPED bbl AV NV d-exp Pore Press OUTPUT cfm Press. psic MUD ADDED 15 Gel, 6 Rayvan, 8 Unidri 11, 1 Caustic, MAKE RATING

1 GNC. DAILY MUD COST

RIG TIME

1. Drilling 21 1/2 6 Surveying

2. Tripping 7. Circulating

3. Service & BOPs 1 1/2 8 Clean to Btm


5. Slip & Cutline 10. RepAring

OTHERS (SPECIFY/

11. Coring 16 Waiting On Water - 1 12. Testing 17

13. Logging 18

14. Casing 19

15. WOC 20


Drilled with Bit No. 3 from 3726 to 4164 feet. Waited on water. Cleaned mud tank, shale shaker, and sand trap.

Well Costs

Daily

Cumulative

WEATHER: TEMP.

Form HE-D1

of


Well Costs

Daily

Cumulative


DAILY DRILLING REPORT ' (As OF 7:00 AM)

WELL Chevron-SONAT 111 Zubrod DAY NO. 6 DATE Jan. 5, 1980

DEPTH 4600' FEET MADE

436

HRS. ON BOTTOM

23 1/4 OPERATION Drilling

SURVEY

621.16 116

C-350 C-250

LAST PIPE TALLY

WT OF STRING M LBS

PUMPNq 1 National PUMP No 2 National DRILL PIPE OD 4 /2

619.37 WT ON BIT M LBS 35

IN USE X LINERS 5 1/2 x 18 IN USE LINERS 5 1/2 x 16

THD XH DRILL COLLARS OD 6 1/2

BOARD

SPM

SPM

THD H-90

CORRECTION: YES NO X

ROTARY RPM

43 PRESS 1100 PRESS

No. IN HOLE 15

65

BIT NO. SIZE TYPE

DEPTH

IN

DEPTH

OUT

FT.

MADE

TOTAL

HRS. RUN

JET SIZE

IN 32nds

COND

REMARKS T B G

3 7 7/8 F2 3720 880 46 3/4 12 12 12

Ream Bit No.

Core

No.

FEET CUT FEET REC.

MUD

WT 9 VIS 30 WL 40

GEL FC

Hrs. Run IN OUT

DESILTER I LB/GAL



SOLIDS SAND CA + + PPM COMPRESSOR DATA MUD DUMPED bbl AV NV d-exp Pore Press OUTPUT cfm Press psig MUD ADDED 10 Gel, 8 Rayvan, 3 Unidrill, 2 Caustic MAKE RATING

3 CMC, 5 Nitrate DAILY MUD COST

RIG TIME OTHERS (SPECIFY) 1. Drilling 231/4 6. Surveying 11. Coring 16

2. Tripping 7. Circulating 12. Testing 17

3. Service & BOPs 3 / 4 8 Clean to Btm 13 Logging 18

4. Reaming 9. Cond. Mud 14. Casing 19



Drilled with Bit No. 3 from 4164 to 4600 feet.

WEATHER: TEMP. °F Supervisor John 11 Hughes Form HE-D1

Well Costs

Daily

Cumulative

Supervisor John H. Hughes WEATHER: TEMP. —10 ° F High Wind - 50 MPH





7:00 AM(

7 DAY NO. DATE Jan. 6, 1980

DEPTH 4984' FEET MADE 384 HRS. ON BOTTOM 22 3/4 OPERATION

SURVEY

Drilling


WT OF STRING M LBS. 116 WT ON BIT M LBS 35 ROTARY RPM 65 PUMP No 1 _Nati32nalc- .3:1 IN USE X LINERS 5 1/2 x 18 SPM 42 PRESS 1100 PUMP No 2 National C-250 IN USE LINERS 5 1/2 x 16 SPM PRESS

DRILL PIPE OD 4 /2 THD XH DRILL COLLARS OD 6 1/2 THD 11-90 No. IN HOLE 15 BOTTOM HOLE ASSEMBLY

BIT NO. SIZE TYPE

DEPTH

IN

DEPTH

OUT

FT.

MADE

TOTAL

FIRS. RUN

JET SIZE

IN 32nds

COND

REMARKS T B G

15 7 7/8 F2 3720 1264 69 1/2 12 12 12

Ream Bit No.

Core

No.

FEET CUT FEET REC.

MUD

WT 9.8 VIS 36 m 16 GEL FC

Hrs. Run IN OUT

DESILTER LB/GAL




AV NV d-exp Pore Press OUTPUT cfm Press. psis

MUD ADDED 6 Driscose, 5 Mica, 4 Caustic, 32 Gel, MAKE RATING

6 Ravvan, 1 Y-Drill DAILY MUD COST

RIG TIME

1. Drilling 22 3/4 6 Surveying 11 Coring 16


3. Service & BOPs 1 1/4 8 Glean to Btm 13 Logging 18

4. Reaming 9 Cond. Mud 14. Casing 19

5. Slip & Cutline 10. Repthring 15. WOC 20


OTHERS (SPECIFY)

Form HE-D1

$ Well Costs

Daily

Cumulative


DAILY DRILLING REPORT (AS OF 7:00 AM)

WELL Chevron-SONAT #1 Zubrod DAY NO. 8 DATE Jan. 7, 1980 DEPTH 5022' FEET MADE 38 HRS. ON BOTTOM 3 OPERATION

SURVEY $

LAST PIPE TALLY

WT OF STRING

PUMP No 1

PUMP No 2

DRILL PIPE

Thawing out Stand Pipe

621.16 BOARD 619.37 CORRECTION: YES NO X M LBS 118 WT ON BIT M LBS 35 ROTARY

SPM

RPM 63 National C-350 IN USE X LINERS 5 1/2 x 18 40 PRESS 900 National C-250 IN USE LINERS 5 1/2 x 16 SPM PRESS

OD 4 1/2 THD DRILL COLLARS OD 6 1/2 THD H-90 No. IN HOLE 15 B TT MHO E ASSEMBLY

BIT NO. SIZE TYPE

DEPTH

IN

DEPTH

OUT

FT.

MADE

TOTAL

HRS. RUN

JET SIZE

IN 32nds

COND

REMARKS T B G

3 7 7/8 F2 3720 5022 1302 72 1/2 12 12 12

Ream Bit No.

Core

No.

FEET CUT FEET REC.

MUD

WT 9.9 VIS 36 WL 18.4

GEL FC

Hrs. Run IN OUT

DESILTER LB/GAL


WATER OIL CL— PPM DEGASSER LB/GAL


AV NV d-exp Pore Press OUTPUT 0 m Press Mig MUD ADDED 2 Caustic, 2 Rayvan, 1 Driscose, MAKE RATING

5 Mica DAILY MUD COST

RIG TIME

1. Drilling 3

2. Tripping 4 1/4

3. Service & BOPs

4. Reaming

5. Slip & Cutline

OTHERS (SPECIFY)

6. Surveying 11 Coring 16 Thawing Out Stand Pipe - 8 7. Circulating 8 3/ 4 12. Testing 17

8 Clean to Btm 13. Logging 18

9 Cond. Mud 14. Casing 19

10. Repring 15. WOC 20


Drilled with Bit No. 3 from 4984 to 4993 feet, and circulated samples. Drilled from 4993 to 5022 feet. Circulated to prepare to core. Tripped out with Bit

Th.we. • and 'ire.

WEATHER: TEMP. -20 °F

Form HE-D1



DAILY DRILLING REPORT (AS OF 7:00 Am)

WELL Chevron-SONAT #1 Zubrod DEPTH 5070' FEET MADE 48 HRS.ONBOTTOM 17 OPERATION

SURVEY


WT OF STRING M LBS 118 WT ON BIT M LBS 20 ROTARY RPM 50 PUMP No 1 National C-350 IN USE X LINERS 5 1/2 x 18 SPM 36 PRESS 750

PUMP No 2 National C-250 IN USE LINERS 5 1/2 x 16 SPM PRESS DRILL PIPE cm 4 1/2 THD XH DRILL COLLARS OD 6 1/2 THD H-90 No. IN HOLE BOTTOM

BIT NO. SIZE TYPE

DEPTH

IN

DEPTH

OUT

FT.

MADE

TOTAL

HRS. RUN

JET SIZE

IN 32nds

COND

REMARKS T B G

Ream Bit No.

Core

No. 1 7 7/8 MC23 5022 48 17 FEET CUT

60 FEET REC.

MUD

9'S 33 13 WT ' VIS WL GEL FC

Hrs. Run IN OUT

DESILTER LB/GAL PH APP VIS PLAS VIS YLD PT DESANDER LB/GAL WATER OIL CL-- PPM DEGASSER LB/GAL SOLIDS SAND CA + + PPM COMPRESSOR DATA MUD DUMPED bbl AV NV d-exp Pore Press OUTPUT cfm Press. psic MUD ADDED 2 Unidrill, 4 Rayvan, 2 Caustic, MAKE RATING

2 Driscose, 16 Gel DAILY MUD COST

RIG TIME

1. Drilling 6 Surveying 11. Coring 17 16 2. Tripping 2 3/4 7. Circulating 1/2 12. Testing 17 3. Service & BOPs B. Clean to Btm 13 Logging 18 4. Reaming 1 9. Cond. Mud 14. Casing 19 5. Slip & Cutline 10. Repairing 15. WOC 20


Picked up Christensen Core Barrel, tripped into hole. Worked tight spot. Finished tripping and reamed to bottom. Circulated hole. Began cutting Core #1, cut from 5022 to 5070 feet.

Well Costs

Daily

Cumulative


Coring

OTHERS (SPECIFY) Picking Up Core Barrel - 21/4 Working Tight Spot - 1/2

John H. Hughes Supervisor WEATHER: TEMP.

Form HE-01

1 0 DAY NO. WELL Chevron-SONAT #1 Zubrod

DEPTH 5082' FEET MADE 12

OPERATION Tripping out

DATE Jan. 9, 1980

2 1/4 HRS. ON BOTTOM

SURVEY S



LAST PIPE TALLY 5072.18 WT OF STRING M LBS.

PUMP No 1 National C-350 PUMP No 2 National C-250 DRILL PIPE OD 4 1/2 THD

BOARD 5082 X CORRECTION: YES NO

WT ON BIT M LBS ROTARY RPM

IN USE LINERS 5 1/2 x 18 SPM

IN USE LINERS 5 1/2 x 16 SPM XH DRILL COLLARS 00 6 1/2 THD H-90

PRESS

PRESS

No. IN HOLE

BIT NO. SIZE TYPE

DEPTH

IN

DEPTH

OUT

FT.

MADE

TOTAL

HRS. RUN

JET SIZE

IN 32nds

CONO

REMARKS T B G

Ream Bit No.

Core

No. 1 7 7/8 MC23 5022 5082 60 19 1/4 FEET CUT

60 FEET REC.

60

MUD

WT 9.6 VIS 41 WL 12 GEL FC

Hrs. Run IN OUT

DESILTER LB/GAL PH APP VIS PLAS VIS YLD PT DESANDER LB/GAL WATER OIL CL-- PPM DEGASSER LB/GAL SOLIDS SAND CA + + PPM COMPRESSOR DATA MUD DUMPED bbl AV NV d-exp Pore Press OUTPUT dm Press PsIg MUD ADDED 61 Gel, 1 Rayvan, 7 Mica, 3 Driscose, MAKE RATING

1 Unidrill, 12 Super Lube DAILY MUD COST

OTHERS (SPECIFY) 6. Surveying 11. Coring 2 1/4 16 Unloading Core - 1 3/4 7. Circulating 6 12. Testing 17 Laying Down Core Barrel -3/4 8 Clean to Btm 2 13. Logging 18 Thawing Out Pumps and 9 Cond. Mud 14. Casing 19 Oilers - 2

5. Slip & Cutline 10. Reptking 15. WOC 20


Cored from 5070 to 5082 feet. Circulated. Tripped out and unloaded Core #1. Cut and recovered 60 feet. Laid down core barrel. Tripped into hole, and washed and reamed to bottom. Thawed out pumps and oilers. Circulated and conditioned hole for DST #1. Tripped out of hole. SLM 5072, Board 5082. Will raise depth 10 feet after DST 111.

Well Costs

Daily

Cumulative

WEATHER: TEMP. -14 °F Supervisor• John H. Hughes Form HE-D1

RIG TIME

1. Drilling

2. Tripping 9 1/4 3. Service & BOPs

4. Reaming

Well Costs

Daily

Cumulative


DAILY DRILLING REPORT iAS OF 7:00 AM)

WELL Chevron-SONAT #1 Zubrod DAY NO. 11 DATE Jan. 10, 1980

DEPTH 5072' * FEET MADE HRS. ON BOTTOM OPERATION

SURVEY c

Reamin

LAST PIPE TALLY

WT OF STRING

PUMP No 1

PUMP No 2 DRILL PIPE

BOTTOM HOLE

5072.18 BOARD 5082 CORRECTION: YES X

RPM

NO

M LBS 120 WT ON BIT M LBS ROTARY

SPM National C-350 IN USE LINERS 5 1/2 x 18 PRESS

National C-250 IN USE LINERS 5 1/2 x 16 SPM PRESS

OD 4 1/2 THD XH DRILL COLLARS OD 6 1/2 THD Ii-90 No. IN HOLE 18 ASSEMBLY

BIT NO. SIZE TYPE

DEPTH

IN

DEPTH

OUT

FT.

MADE

TOTAL

HRS. RUN

JET SIZE

IN 32nds

COND

REMARKS T 13 G

4 7 7/8 F45 5072 13 13 13

Ream Bit No.

Core.

No.

FEET CUT FEET REC.

MUD 9.7 38 16.8 3/6 2/32

WT VIS WL GEL FC

Hrs. Run IN OUT

DESILTER LB/GAL

PH 9 APP VIS PLAS VIS 14 YLD. PT. 8 DESANDER LB/GAL



AV NV d-exp Pore Press OUTPUT cfm Press, psig


DAILY MUD COST

RIG TIME

OTHERS (SPECIFY)

1. Drilling

6 Surveying

11 Coring 16 Picking Up Test Tool - 2

2. Tripping 11 1/2

7. Circulating

12. Testing 5 3/4

17 Breaking Down and Loading 3. Service & BOPs 8. Clean to Btm

13. Logging

18 Test Tool - 3

4. Reaming 1 3/4 9. Cond. Mud

14. Casing

19

5. Slip & Cutline 10. RepAring 15 WOC 20


Picked up Halliburton test tool, and tripped into hole to run DST #1 - 5030-5082 feet. Tripped out of hole. Recovered 3416 feet of gray sulphur water. Broke down test tool and loaded same. Tripped into hole with Bit No. 4, and picked up 3 more drill collars. Reamed to bottom.

*NOTE: After coring and DST #1, hole depth corrected 10 feet upward to 5072 feet.

See DST #1 report for complete details of this test.

WEATHER: TEMP. ° F

Form HE-D1


Well Costs

Daily

Cumulative

3/4 14. Casing 19

15. WOC 20


Drilled with Bit No. 4 from 5072 to 5383 feet. Repaired bull wheel on pump.

6 Surveying

7 Circulating

8 Clean to Btm

9 Cond. Mud

10 Repairing 1 3/4

RIG TIME

1. Drilling 21 1/2

2. Tripping

3. Service & BOPs

4. Reaming

5. Slip & Cutline

OTHERS (SPECIFY)

11 Coring 16

12 Testing 17

13 Logging 18

WEATHER: TEMP. ° F Supervisor: John H. Hughes




HRS. ON BOTTOM

211/2

5072.18 BOARD 5082 CORRECTION: YES x NO

WT OF STRING M LBS. 130 WT ON BIT M LBS 35 ROTARY RPM 65

PUMPNo.1 National C-350 IN USE X LINERS 5 1/2 x 18 SPM 42 PRESS 1000

PUMPNo.2 National C-250 IN USE LINERS 5 1/2 x 16 SPM PRESS

DRILL PIPE OD 4 1/2 THD XH DRILL COLLARS OD 6 1/2 THD H-90 No. IN HOLE 18


BIT NO. SIZE TYPE

DEPTH

IN

DEPTH

OUT

FT.

MADE

TOTAL

HRS. RUN

JET SIZE

IN 32nds

COND

REMARKS T B G

4 7 7/8 F45 5072 311 21 1/2 13 13 13

Ream Bit No.

Core

No.

FEET CUT FEET REC.

MUD

WT 9. 9 %/is 36 WL 10.8 GEL FC

Hrs. Run IN OUT

DESILTER LB/GAL

DESANDER LB/GAL PH APP VIS PLAS VIS YLD PT


COMPRESSOR DATA MUD DUMPED bbl SOLIDS SAND CA + + PPM

OUTPUT cfm Press. psis AV NV d-exp Pore Press

MAKE RATING MUD ADDED 14 Super Lube, 4 Caustic, 6 Rayvan, 5 Driscose, 15 Gel, 2 Unidrill

DAILY MUD COST

DEPTH 5383' FEET MADE 311 OPERATION Drilling

SURVEY

LAST PIPE TALLY

Form HE-D1


HRS. ON BOTTOM 22 1/2

Well Costs

Daily

Cumulative


DAILY DRILLING REPORT 1AS OF 7. 00 AM)

274 FEET MADE

LAST PIPE TALLY 5072 . 18 BOARD 5082 WT OF STRING M LBS. 125 WT ON BIT M LBS 40 ROTARY RPM

PUMP No 1 National C-350 IN USE X LINERS 5 1/2 x 18 SPM 56 1000 PRESS

PUMP No 2 National C-250 IN USE LINERS 5 1/2 x 16 SPM PRESS

DRILL PIPE OD 4 1/2 THD XH DRILL COLLARS OD 6 1/2 THD H-90 No. IN HOLE 18


BIT NO. SIZE TYPE

DEPTH

IN

DEPTH

OUT

FT.

MADE

TOTAL

HRS. RUN

JET SIZE

IN 32nds

COND

REMARKS T B G

4 7 7/8 F45 5072 585 44 13 13 13

Ream Bit No.

Core

No.

FEET CUT FEET REC.

MUD

WT 9 . 9 vis 35 wi_ 22 GEL FC

Hrs. Run IN OUT

DESILTER LB/GAL




OUTPUT cfm Press prig AV NV d-exp Pore Press

MAKE RATING MUDADDED3 001dri11, 1 Caustic, 4 Rayvan, 3 Super Lube 2 Driscose, 16 Gel

DAILY MUD COST

RIG TIME

OTHERS (SPECIFY)


2. Tripping 7 Circulating 12. Testing 17

3. Service .& BOPs 8 Clean to Btm 13. Logging 18


5. Slip & Cutline 10. RepEgring 1 1/2 15 WOC 20


Drilled with Bit No. 4 from 5383 to 5657 feet. Repaired pump. Cleaned mud tanks.

WEATHER: TEMP.

Form HE-D1

o f


CORRECTION: YES X NO

65


DEPTH 5657 OPERATION Drilling

SURVEY


201 13 FEET MADE HRS. ON BOTTOM DEPTH 5858' OPERATION Drilling

SURVEYS

Supervisor • John H. Hughes WEATHER: TEMP. ° F

Form HE-D1


DAILY DRILLING REPORT (AS Or 7:00 AM)

LAST PIPE TALLY 5072.18 BOARD

WT OF STRING M LBS. 132 PUMP No, 1 National G-350 IN USE X LINERS

PUMP No 2 National C-250 IN USE LINERS

DRILL PIPE OD 4 1/2 THD XH DRILL COLLARS OD


WT ON BIT M LBS ROTARY RPM

SPM 42

CORRECTION: YES X NO

58 PRESS 1000

SPM

THD H-90 PRESS

No. IN HOLE 18

5082 48 5 1/2 x 18 5 1/2 x 16

6 1/2

BIT NO. SIZE TYPE

DEPTH

IN

DEPTH

OUT

FT.

MADE

TOTAL

HAS. RUN

JET SIZE

IN 32nds

COND

REMARKS T B G

4 7 7/8 F45 5072 786 57 13 13 13

Ream Bit No.

Core

No.

FEET CUT FEET REC.

MUD

WT 9 . 1 vis 39 WL 12.6 GEL FC

Hrs. Run IN OUT

DESILTER LB/GAL


WATER OIL CL- - PPM DEGASSER LB/GAL


AV NV d-exp Pore Press OUTPUT cfm Press. psic

MUD ADDED 29 Gel, 2 Super Lube, 4 Rayvan, 2 Dr iSCOSe , MAKE RATING

3 Caustic, 2 Soda Ash, 1 Unidrill, 10 Fiber DAILY MUD COST

6. Surveying

7 Circulating

3. Service & BOPs 1 8. Clean to Btm


5. Slip & Cutline 10. Repairing

OTHERS (SPECIFY)

Pumping Plug into Hole - 5 Rebuilt Mud - 3

14. Casing 19

15. WOC 20

RIG TIME

1. Drilling

2. Tripping 2 13 11 Coring 16

12. Testing 17

13 Logging 18


Drilled with Bit No. 4 from 5657 to 5753 feet. Lost circulation and 700 barrels mud. Pulled 6 stands. Pumped fiber plug down hole to regain circulation. Mixed new mud. Tripped 6 stands back into hole. Drilled from 5753 to 5858 feet. Cleaned suction tank.

$ Well Costs

Daily

Cumulative

Well Costs

Daily

Cumulative


DAILY DRILLING REPORT lASOF 7:00 AM)


DEPTH 6291' OPERATION

Drilling

SURVEY

FEET MADE

433

HRS. ON BOTTOM

23

LAST PIPE TALLY 5072.18 BOARD 5082

WT OF STRING M LBS. 139 WT ON BIT M LBS 40

PUMP No 1 National C-350 IN USE X LINERS 5 1/2 x 18

PUMP No 2 National C-250 IN USE LINERS 5 1/2 x 16 DRILL PIPE OD 4 1/2 THD XH DRILL COLLARS OD 6 1/2


CORRECTION YES X NO

ROTARY RPM 60

SPM 43

PRESS 1000

SPM

PRESS

THD

H-90 No. IN HOLE18

BIT NO. SIZE TYPE

DEPTH

IN

DEPTH

OUT

FT.

MADE

TOTAL

HRS. RUN

JET SIZE

IN 32nds

COND

REMARKS T B G

4 7 7/8 F45 5072 1219 80 13 13 13

Ream Bit No.

Core

No.

FEET CUT FEET REC.

MUD

WT 9 . 4 vis 37 wt. 12-8 GEL FC

Hrs. Run IN OUT

DESILTER LB/GAL

DESANDER LB/GAL PH APP VIS PLAS VIS YLD PT

DEGASSER LB/GAL WATER OIL CL-- PPM


OUTPUT cfm Press psig AV NV d-exp Pore Press

MAKE RATING MUDADDED 17 Gel, 3 Unidrill, 3 Driscose, 6 Rayvan,

6 Super Lube, 5 Soda, 7 Mica, 2 Fiber DAILY MUD COST

RIG TIME

OTHERS (SPECIFY)

11 Coring 16.

2. Tripping 7 Circulating 12. Testing 17.

3. Service & BOPs 1 /2 8 Clean to Btm 13 Logging 18


5. Slip & Cutline 10. Repairing 1/2 15 WOC 20


Drilled with Bit No. 4 from 5858 to 6291 feet. Cleaned mud tanks. Changed air control in #1 pump.

WEATHER: TEMP. °F Supervisor: John H. Hughes

1. Drilling 23 6 Surveying

Form HE-D1


DAILY DRILLING REPORT IAS OF 7:00 AM)


DEPTH 6500' OPERATION

SURVEY

DAY NO.

S

6500 3/4 °

Cutting drill line FEET MADE 209 HRS. ON BOTTOM

16 DATE Jan. 15, 1980 14 3/4

LAST PIPE TALLY 6508 WT OF STRING M LBS 140

PUMP No 1 National C-350 PUMP No 2 National C-250 DRILL PIPE OD 4 1/2 THD

BOARD 6500 CORRECTION: YES NO X WT ON BIT M LBS 40 ROTARY RPM 62 IN USE X LINERS 5 1/2 x 18 SPM 45 PRESS 1000 IN USE LINERS 5 1/2 x 16 SPM PRESS

XH DRILL COLLARS OD 6 1/2 THD H-90 No. IN HOLE 18


BIT NO. SIZE TYPE

DEPTH

IN

DEPTH

OUT

FT.

MADE

TOTAL

HRS. RUN

JET SIZE

IN 32nds

COND

REMARKS T B G

4 7 7/8 F45 5072 6500 1428 94 3/4 13 13 13

Ream Bit No.

Core

No.

FEET CUT FEET REC.

MUD 9.3 34 15

WT V1S WL GEL FC

Hrs Run IN OUT

DESILTER LB/GAL


WATER OIL CL - PPM DEGASSER LB/GAL


AV NV d-exp Pore Press OUTPUT cfm Press. Psic


DAILY MUD COST

RIG TIME OTHERS (SPECIFY)

1. Drilling

14 3/4 6. Surveying 1/4 11 Coring 18 Waiting on Core Bit - 1 3/4

2. Tripping 2 3/4 7 Circulating 2 12. Testing 17 Picking Up Core Barrel - 11/2

3. Service & BOPs 1/4 8. Clean to Btm 13 Logging 18 Cutting Drill Line - 3/4 4. Reaming 9. Cond. Mud 14. Casing 19

5. Stip & Cutline 10 Repring 15. WOC • 20.


Drilled with Bit No. 4 from 6291 to 6500 feet. Conditioned mud and circulated for Core 1/2. Tripped out of hole. Laid down two joints, and picked up one. Waited on core man. Picked up core barrel, and tripped into hole. Cut drilling line.

SLM 6508'; Board 6500' - No correction, will strap after Core and DST #2.

Well Costs

Daily

Cumulative

WEATHER: TEMP. °F Supervisor John H. Hughes Form HE-D1

$ Well Costs

Daily

Cumulative


DAILY DRILLING REPORT (As OF 7 .00 A.)

1 Zubrod Chevron-SONAT ill WELL DAY 17 Jan. 16, NO. DATE 1980


SURVEY

Corin

LAST PIPE TALLY

WT OF STRING

PUMP No 1

PUMP No 2

DRILL PIPE

BOTTOM HOLE

6508 BOARD 6500 CORRECTION: YES NO X M LBS. 142 WT ON BIT M LBS 20 ROTARY

SPM

RPM 50 National C-350 IN USE LINERS 5 1/2 x 18 PRESS

National C-250 IN USE LINERS 5 1/2 x 16 SPM PRESS

OD 4 1/ 2 THD XH DRILL COLLARS OD 6 1/2 THD H-90 No. IN HOLE

ASSEMBLY

BIT NO. SIZE TYPE

DEPTH

IN

DEPTH

OUT

FT.

MADE

TOTAL

HRS. RUN

JET SIZE

IN 32nds

COND

REMARKS T B G

Ream Bit No.

Core

No. 2 7 7/8 MC23 6500 52 16 3/4 FEET CUT FEET REC.

MUD

WT 9.4 VIS 38 WL 12 GEL FC

Hrs. Run IN OUT

DESILTER LB/GAL


WATER OIL CL— PPM DEGASSER LB/GAL


AV NV d-exp Pore Press OUTPUT ern Press. psig

MUD ADDED 76 Gel, 4 Driscose, 7 Soda Ash, 2 Caustic, MAKE RATING

4 Superflow DAILY MUD COST

RIG TIME

OTHERS (SPECIFY)

1. Drilling 6 Surveying 11. Coring 16 3/4 16

2. Tripping 2 1/4 7 Circulating 12. Testing 17

3. Service & BOPs 8. Clean to Btm 13 Logging 18

4. Reaming 3 1/2 9. Cond. Mud 14. Casing 19

5. Slip & Cutline 10 Repairing 1 1/2 15 WOC 20


Finished cutting drilling line. Tripped into hole with core barrel to cut Core #2. Washed and reamed 400 feet to bottom. Cored from 6500 to 6552 feat. Repaired oiler chain in compound.

WEATHER: TEMP. 28 °F Supervisor- John H. Hughes Form HE-D1

HELTON ENGINEERING 81 GEOLOGICAL SERVICES, INC.

DAILY DRILLING REPORT 1AS OF 7:00 AM)

WELL DEPTH 65R7' OPERATION Corin

Chevron-SONAT #1 Zubrod DAY NO. 18 DATE Jan. 17, 1980

FEET MADE

30

HRS. ON BOTTOM

7 3/4 g

S SURVEY

LAST PIPE TALLY 6508 WT OF STRING M LBS 142 PUMP No 1 National C-350 PUMP No. 2 National C-250 DRILL PIPE OD 4 1/2 THD

BOARD 6500 CORRECTION: YES NO X WT ON BIT M LBS 20 ROTARY RPM 48 IN USE LINERS 5 1/2 x 18 SPM 35 PRESS .1000 IN USE LINERS 5 1/2 x 16 SPM PRESS XH DRILL COLLARS OD 6 1/2 THD H-90 No. IN HOLE

BIT NO. SIZE TYPE

DEPTH

IN

DEPTH

OUT

FT.

MADE

TOTAL

HRS. RUN

JET SIZE

IN 32nds

COND

REMARKS T B G

Ream Bit No.

Core

No. 2 7 7/8 MC23 6500 6560 60 19 3/4 FEET CUT 60

FEET REC. 60

3 7 7/8 M23 6560 22 4 3/4

MUD

WT 9 . 3 VIS 38 WL 14 GEL FC

Hrs. Run IN OUT

DESILTER LB/GAL



SOLIDS SAND CA + + PPM COMPRESSOR DATA MUD DUMPED bbl AV NV d-exp Pore Press OUTPUT cfm Press psig MUD ADDED 1 Dr isc0se , 2 Super Lube , 1 Caustic, MAKE RATING

8 Gel DAILY MUD COST

OTHERS (SPECIFY)

11. Coring 7 3/4 16 Unloading Core Tool - 1 12. Testing 17 Waiting on Orders - 1 1/2 13 Logging 18 Making Up Core Barrel - 1/2 19

20

Cut Core #2 from 6552 to 6560 feet. Tripped out with Core #2, and unloaded core. Waited on orders. Worked on stabilizer. Made up core barrel and tripped into hole to cut Core #3. Reamed 70 feet to bottom. Cut Core #3 from 6560 to 6582 feet.

Well Costs

Daily

Cumulative

28

° F

WEATHER: TEMP.

Form HE-D1 Supervisor John H. Hughes

RIG TIME

1. Drilling

2. Tripping 4 3/4 3. Service & BOPs 1/4

6. Surveying

7. Circulating

8 Clean to Btm

4. Reaming 1 1/4 9. Cond. Mud 14. Casing

5. Slip & Cutline 10. Repairing 7 16. WOC


Well Costs

Daily

Cumulative

WEATHER: TEMP. ° F

Form HE-D1 Supervisor: John H Hughes

Cored from 6582 to 6616 feet Tripped out of hole. Broke out core and laid down core barrel. Tripped into hole to condition hole for DST. Washed to bottom and circulated. Tripped out of hole.

Picked up Halliburton test tool and tripped into hole. Began DST #2 - 6490-6616'.




7:00 AM)



SURVEY

Testin g

LAST PIPE TALLY 6614.36 BOARD 6616 CORRECTION: YES NO X

WT OF STRING M LBS 142 WT ON BIT M LBS 20 ROTARY RPM 48 PUMP No, 1 National C-350 IN USE LINERS 5 1/2 x 18 SPM 35 PRESS 1000 PUMP No 2 National C-250 IN USE LINERS 5 1/2 X 16 SPM PRESS DRILL PIPE OD 4 1/2 THD XH DRILL COLLARS OD 6 1/2 THD H-90 No. IN HOLE

BIT NO. SIZE TYPE

DEPTH

IN

DEPTH

OUT

FT.

MADE

TOTAL

HRS. RUN

JET SIZE

IN 32nds

COND

REMARKS T B G

Ream Bit No.

Core

No. 3 7 7/8 M23 6560 6616 56 8 FEET CUT

56 FEET REC.

56

MUD

WT 9.4 VIS 38 WL 14.4 GEL FC

Hrs. Run IN OUT

DESILTER LB/GAL




AV NV dexp Pore Press OUTPUT cfm Press. psic MUD ADDED 44 Gel, 3 Driscose, 2 Super Lube, 15 Mica, MAKE RATING

1 Caustic DAILY MUD COST

RIG TIME

1. Drilling 6. Surveying 11. Coring 3 1/4 2. Tripping 10 1/4 7. Circulating 2 12. Testing 4 3. Service & BOPs 8. Clean to Btm 1/2 13. Logging 18 2 1/4 4. Reaming 9. Cond. Mud 14. Casing 19



OTHERS (SPECIFY)

16 Picking Up Test Tool - 1 3/4 17 Isaytla..g_flosta_care_Banted_r

$ Well Costs

Daily

Cumulative



WELL Chevron-SONAT #1 Zubrod DAY NO. 20 DATE Jan. 19, 1980 DEPTH 6813 FEET MADE 197 HRS. ON BOTTOM 13 1/2 OPERATION

SURVEY

Drillin

LAST PIPE TALLY

WT OF STRING

PUMP No 1

PUMP No 2

DRILL PIPE

BOTTOM H

6614.36 6616 BOARD CORRECTION: YES NO X

M LBS. 152 40 WT ON BIT M LBS ROTARY

SPM

RPM 63 National C-350 IN USE X LINERS 5 1/2 x 18 44 PRESS 1100 National C-250 IN USE LINERS 5 1/2 x 16 SPM PRESS

OD 4 1/2 THD XH DRILL COLLARS OD 6 1/2 THD H-90 No. IN HOLE 18 E ASSEMBLY

BIT NO. SIZE TYPE

DEPTH

IN

DEPTH

OUT

FT.

MADE

TOTAL

HRS. RUN

JET SIZE

IN 32nds

COND

REMARKS T B G

5 7 7/8 F45 6616 197 13 1/2 13 13 13

Ream Bit No.

Core

No.

FEET CUT FEET REC.

MUD

WT 9 . 2 VIS 35 WL 11.6 GEL FC

Hrs. Run IN OUT

DESILTER LB/GAL



SOLIDS SAND CA + + PPM COMPRESSOR DATA MUD DUMPED bbl AV NV d-exp Pore Press OUTPUT cfm Press. psic MUD ADDED 35 Gel, 4 Driscose MAKE RATING

DAILY MUD COST

6. Surveying 11. Coring

7. Circulating 12. Testing 3/4 17 3. Service & BOPs 8. Clean to Btm 13 Logging 18 4. Reaming 3/4 9. Cond. Mud 14. Casing 19


DRILLING & GEOLOGICAL REMARKS Time & Sequence of Operations to be inserted below)

Finished running DST #2. Tripped out of hole. Broke down Halliburton test tool. Tripped into hole with Bit No. 5, and reamed to bottom. Drilled from 6616 to 6813 feet.

See DST #2 report for complete details of this test.

WEATHER: TEMP. ° F

Form HE-D1


RIG TIME

1. Drilling 13 1/2

2. Tripping 6 1/2

OTHERS (SPECIFY) 16 Broke Out Test Tool - 2 1/2

DEPTH 7125 FEET MADE 312 HRS. ON BOTTOM OPERATION Drillin a

SURVEY

23 1/2

$ Well Costs

Daily

Cumulative



WELL Chevron-SONAT 1/1 DAY NO. 1 Zubrod 21 DATE Jan. 20, 1980

LAST PIPE TALLY 6614.36 WT OF STRING M LBS 154 PUMP No 1 National C-350 PUMP No 2 National. C-250 DRILL PIPE OD 4 1/2 THD


BOARD 6616 CORRECTION: YES NO X

WT ON BIT M LBS 40 65 ROTARY RPM

IN USE X LINERS 5 1/2 x 18 SPM 44 PRESS 1100

IN USE LINERS 5 1/2 x 16 SPM PRESS

XH DRILL COLLARS OD 6 1/2 THD H-790 No. IN HOLE 18

BIT NO. SIZE TYPE

DEPTH

IN

DEPTH

OUT

FT.

MADE

TOTAL

HRS. RUN

JET SIZE

IN 32nds

COND

REMARKS T B G

5 7 7/8 845 6616 509 37 13 13 13

Ream Bit No.

Core

No.

FEET CUT FEET REC.

MUD


Hrs. Run IN OUT

DESILTER LB/GAL




AV NV d-exp Pore Press OUTPUT cfm Press. psic

MUD ADDED 93 Gel, 5 Driscose, 3 Caustic, 5 Fiber, MAKE RATING 10 Mica, 2 Rayvan, 1 Unidrill, 2 Super Lube

DAILY MUD COST

RIG TIME



3. Service & BOPs 1 / 2 8. Clean to Btm 13. Logging 18


5. Slip & Cutline 10 Repairing 15 WOC

20



WEATHER: TEMP. °F

Form HE•131

Supervisor

John H. Hughes

OTHERS (SPECIFY)

S Well Costs

Daily

Cumulative



WELL DEPTH 7220 OPERATION Reamin g

FEET MADE to Bottom

22 DATE Jan. 21, 1980

12 1/2

Chevron-SONAT #1 Zubrod DAY NO. 95 HRS. ON BOTTOM

SURVEY

6614.36 LAST PIPE TALLY

6616 BOARD CORRECTION

RPM ROTARY

YES NO X

WT OF STRING M LBS. 160 WT ON BIT M LBS 40 63 PUMP No 1 National C-350 IN USE X LINERS 5 1/2 x 18 SPM 44 PRESS 1000

PUMP No 2 National C-250 IN USE LINERS 5 1/2 x 16 SPM PRESS

DRILL PIPE OD 4 /2 THD XH DRILL COLLARS OD 6 1/2 THD H-90 No. IN HOLE 18


BIT NO. SIZE TYPE

DEPTH

IN

DEPTH

OUT

FT.

MADE

TOTAL

HRS. RUN

JET SIZE

IN 32nds

COND

REMARKS T B G

5 7 7/8 F45 6616 7220 604 49 1/2 13 13 13

Ream Bit No.

Core

No. 4 7 7/8 M23 7220 FEET CUT FEET REC.

MUD


Hrs. Run IN OUT

DESILTER LB/GAL




AV NV d -exp Pore Press OUTPUT cfm Press psig

MUD ADDED 42 Gel, 2 Unidrill, 2 Caustic, 4 Rayvan, MAKE RATING

4 Soda Ash, 4 Super Lube, 1 CMG (Water Loss) DAILY MUD COST

OTHERS (SPECIFY)

6. Surveying 11 Coring 16. Picking Up Core Barrel - 11/2

7 Circulating 2 12. Testing 17

8. Clean to Btm 13 Logging 18

9 Cond. Mud 14 Casing 19

5. Slip & Cutline 10 Repairing 1/2 15 WOC 20


Drilled with Bit No. 5 from 7125 to 7220 feet. Tripped out of hole. Picked up core barrel, and tripped into hole, and reamed to bottom. Replaced bearing in swivel.

WEATHER: TEMP. °F

Form HE-D1


RIG TIME

1. Drilling 12 1/2

2. Tripping 6 3/4

3. Service & BOPs 1/4

4. Reaming 1/2

$ Well Costs

Daily

Cumulative


DAILY DRILLING REPORT iAS OF 7:00 Aso

WELL DAY NO. Chevron-SONAT #1 Zubrod 23 DATE Jan. 22, 1980

DEPTH 7280'

FEET MADE

60 HRS.ONBOTTOM OPERATION Reamin g

SURVEY S

LAST PIPE TALLY 6614.36 BOARD 6616 CORRECTION: YES NO X

WT OF STRING M LBS 157 WT ON BIT M LBS 20 ROTARY RPM 50 PUMP No, 1 National C-350 IN USE LINERS 5 1/2 x 18 SPM 40 PRESS 1000 PUMP No 2 National C-250 IN USE LINERS 5 1/2 x 16 SPM PRESS DRILL PIPE OD 4 1/2 THD XH DRILL COLLARS OD 6 1/2 THD H-90 No. IN HOLE 18

BIT NO. SIZE TYPE

DEPTH

IN

DEPTH

OUT

FT.

MADE

TOTAL

HRS. RUN

JET SIZE

IN 32nds

COND

REMARKS T B G

6 7 7/8 F45 7280 13 13 13

Ream Bit No.

Core

No. 4 7 7/8 M23 7220 7280 60 9 1/2 FEET CUT

60 FEET REC.

45.7

MUD

WT 9.3 VIS 45 WL 10.5 GEL FC

Hrs. Run IN OUT

DESILTER LB/GAL




AV NV d-exp Pore Press OUTPUT cfm Press psig MUD ADDED 10 Gel, 1 CMC, 2 Rayvan, 2 Super Lube, MAKE RATING

2 Soda Ash. DAILY MUD COST

OTHERS (SPECIFY)

11. Coring 9 1 / 2 16 Unloading Core - 1 1/4 1 12. Testing 17 Broke Down Core Barrel - 1/2 13. Logging 18 Cutting Drill Line - 2

4. Reaming 2 9 Cond. Mud 14. Casing 19

5. Slip & Cutline 10. Repairing 15 WOC 20


Reamed to bottom. Cored from 7220 to 7280 feet. Tripped out of hole. Broke down core barrel, and unloaded core #4, 7220-7280. Ran collars in and cut drilling line. Tripped into hole with Bit No. 6, and washed and reamed to bottom.

WEATHER: TEMP.

Form HE-D1

o f

Supervisor' John H. Hushes

9 1/2

RIG TIME

1. Drilling

2. Tripping 7 3/4 3. Service & BOPs

6 Surveying

7. Circulating

8. Clean to Btm


DEPTH 7760' DAY NO. 24 Jan. 23, 1980

HRS. ON BOTTOM DATE 480 FEET MADE 23 1/4

Well Costs

Daily

Cumulative



OPERATION SURVEY

Drillin

LAST PIPE TALLY

WT OF STRING

PUMP No 1 PUMP No 2

DRILL PIPE

6614.36 BOARD 6616

ROTARY

CORRECTION: YES X NO _

M LBS 160 WT ON BIT

IN USE

M LBS 40

SPM

SPM

THD

RPM 60

National C-350 LINERS 5 1/2 x 18 40 PRESS 1100 National C-250 IN USE LINERS 5 1/2 x 16 PRESS

OD 4 1/2 THD XH DRILL COLLARS OD 6 1/2 H-90 No. IN HOLE 18

BIT NO. SIZE TYPE

DEPTH

IN

DEPTH

OUT

FT.

MADE

TOTAL

HRS. RUN

JET SIZE

IN 32nds

COND

REMARKS T B G

6 7 7/8 F45 7280 480 23 1/4 13 13 13 Rerun #5

Ream Bit No.

Core

No.

FEET CUT FEET REC.

MUD 9.3 40 9.6 WT VIS WL GEL FC

Hrs. Run IN OUT

DESILTER LB/GAL



SOLIDS SAND CA + + PPM COMPRESSOR DATA MUD DUMPED bbl AV NV d-exp Pore Press OUTPUT cfm Press. psig MUD ADDED 10 Gel, 1 Caustic, 2 Rayvan, 2 Soda, MAKE RATING

1 CMC DAILY MUD COST

RIG TIME

1. Drilling 23 1/4 6. Surveying 11. Coring 16 2. Tripping 7. Circulating 12. Testing 17 3. Service & BOPs 1/4 8. Clean to Btm 13. Logging 18 4. Reaming 9. Cond. Mud 14. Casing 19 5. Slip & Cutline 10. Repairing 1/ 2 15. WOC 20



OTHERS (SPECIFY)

WEATHER: TEMP. °F Supervisor: JOha_1,__HUgh.B.B Form HE-D1

Well Costs $

Daily

Cumulative



FEET MADE


DEPTH 7770' DAY NO. 25 DATE Jan. 24, 1980

10 HRS. ON BOTTOM 1 OPERATION Logging

SURVEY S

LAST PIPE TALLY 6614.36 BOARD 6616 CORRECTION: YES NO X WT OF STRING M LBS 160 WT ON BIT M LBS 40 ROTARY RPM 60 PUMP No 1 National C-350 IN USE LINERS 5 1/2 x 18 SPM 40 PRESS 1000 PUMP No 2 National C-250 IN USE LINERS 5 1/2 x 16 SPM PRESS DRILL PIPE OD 4 1/2 THD XH DRILL COLLARS OD 6 1/2 THD H-90 No. IN HOLE 18

BIT NO. SIZE TYPE

DEPTH

IN

DEPTH

OUT

FT.

MADE

TOTAL

HRS. RUN

JET SIZE

IN 32nds

COND

REMARKS T B G

6 7 7/8 F45 7280 7770 490 24 1/4 13 13 13 Rerun #5

Ream Bit No.

Core

No.

FEET CUT FEET REC.

MUD 9.5 60 8.8

WT VM WL GEL FC

Hrs. Run IN OUT

DESILTER LB/GAL

PH APP VM PLAS VIS YLD PT DESANDER LB/GAL



AV NV d-exp Pore Press OUTPUT cfm Press psis

MUD ADDED 1 Caustic, 2 Rayvan, 2 Soda Ash, 1 CMC, MAKE RATING 76 Gel.

DAILY MUD COST

RIG TIME

1. Drilling 1 1/4 6. Surveying 11 Coring

2. Tripping 3 1/2 7. Circulating 7 1 / 4 12. Testing

3. Service & BOPs 8 Clean to Btm 13 Logging 11 18


5. Slip & Cutline 10 Repairing 15. WOC 20


OTHERS (SPECIFY)

16 Rigging Up Schlumberger - 1 17

Drilled with Bit No. 6 from 7760 n 7770 feet i ula ed and enndi ti A A Made short trip. Circulated for logs. Tripped out of hole to run logs Rig.-d up. Schlumberger. Ran Dual Induction Laterolog with SP; CNL-FDC with Gamma Ray and Caliper; and the Integrated BHC Sonic Log with Gamma Ray and Caliper.

SrhlumbereeLillialDepth - 7773' Driller Total Deoth - 7770'

WEATHER: TEMP. ° F

Form HE-D1

Superv is o r: John H. Hughes

Well Costs

Daily

Cumulative


DAILY DRILLING REPORT (AS OF 7:00 Am)

DEPTH 7 77 0 ' FEET MADE OPERATION Waiting on Cement.

SURVEY


HRS. ON BOTTOM


LAST PIPE TALLY 6614.36 BOARD 6616 CORRECTION: YES _NO X

WT OF STRING M LBS. WT ON BIT M LBS ROTARY RPM

PUMP No 1 National C-350 IN USE LINERS 5 1/2 x 18 SPM

PUMP No 2 National C-250 IN USE LINERS 5 1/2 x 16 SPM

DRILL PIPE OD 4 1/2 THD XH DRILL COLLARS OD 6 1/2 THD

BIT NO. SIZE TYPE

DEPTH

IN

DEPTH

OUT

FT.

MADE

TOTAL

HRS. RUN

JET SIZE

IN 32nds

COND

REMARKS T B G

Ream Bit No.

Core

No.

FEET CUT FEET REC.

MUD

WT VIS WL GEL FC

Hrs. Run IN OUT

DESILTER LB/GAL




AV NV d-exp Pore Press OUTPUT cfm Press. psig


DAILY MUD COST

RIG TIME

1. Drilling

2. Tripping 3 3. Service & BOPs 1/4

4. Reaming

6. Surveying

7. Circulating

8 Clean to Btm

9. Cond. Mud

OTHERS (SPECIFY)

11 Coring 16 Laying Down Drill 12. Testing 17 Collars - 2 3/4 13. Logging 14 3/4 18 Waiting on Cement - 3 1/4 14. Casing 19

5. Slip & Cutline 10. Repairing 15 WOC 20


PRESS

PRESS

H-90 No. IN HOLE

Ran Continuous Dipmeter log. and Fracture Finder log. Rigged down loggers. Ran drill collars in. and laid down drill collars. Tripped into hole, and

i .

WEATHER: TEMP. ° F

Form HE-D1

Supervisor' John H. Hughes

• • •

Well Costs

Daily

Cumulative


DAILY DRILLING REPORT (As OF 7 : 00 AM)


DEPTH 7770' FEET MADE HRS. ON BOTTOM OPERATION Plugged and Abandoned

SURVEY

LAST PIPE TALLY BOARD CORRECTION: YES NO

WT OF STRING M LBS. WT ON BIT M LBS ROTARY RPM

PUMP No 1 IN USE LINERS SPM PRESS

PUMP No 2 IN USE LINERS SPM PRESS DRILL PIPE OD THD DRILL COLLARS OD THD No. IN HOLE

BIT NO. SIZE TYPE

DEPTH

IN

DEPTH

OUT

FT.

MADE

TOTAL

HRS. RUN

JET SIZE

IN 32nds

COND

REMARKS T 8 G

Ream Bit No.

Core

No.

FEET CUT FEET REC.

MUD

WT VIS WL GEL FC

Hrs. Run IN OUT

DESILTER LB/GAL




AV NV d-exp Pore Press OUTPUT cfm Press. psig


DAILY MUD COST

RIG TIME

1. Drilling

6 . Surveying 11 Coring 16

2. Tripping

7. Circulating 6 12. Testing 17

3. Service & BOPs 8 Clean to Btm 13 Logging 18


5. Slip & Cutline 10 Repairing 15. WOC 20


Circulated. Set plugs as follows:

Plug #1 6400 - 6700 100 sacks cement. Plug #2 4900 - 5200 100 sacks cement. Plug #3 3500 - 3600 40 sacks cement. Plug 114 550 - 650 40 sacks cement. Plug #5 Top of Surface 10 sacks cement.

Tore down rig. Rig released at 7:00 A.M. on January 26, 1980.

WEATHER: TEMP.

Form HE-D1

o f Supervisor John H. Hughes

OTHERS (SPECIFY)

Plugging - 9 Tearing Down - 9

OF 1


DEVIATION SURVEY SUMMARY

Chevron -SONAT

WELL NAME: #1 Zubrod SW NE Sec. 18-T22N-R21E

LOCATION: Corson County, South Dakota

DEPTH FEET

DEVIATION DEGREES

CHANGE DEGREES

INTERVAL FEET

Rate of Change Degrees/100 Ft.

610 3/4 + 3/4 610 0.123

1084 1/2 - 1/4 474 0.053

1579 1/4 - 1/4 495 0.051

2012 1/2 + 1/4 433 0.058

2758 1/2 0 746 --

3379 1/2 + 1/2 621 0.081

3720 3/4 + 1/4 341 0.073

6500 3/4 0 2780 --

Form HE-D5

HELTON EN G INEERING & GE OL OG ICAL SERV ICES, INC.

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Form HE- D6


Chevron-SONAT #1 Zubrod SW NE Section 18: T22N - R21E


MUD SUMMARY

A 12 1/4" surface hole was spudded at 3:00 P.M. on December 30, 1979, and drilled to a depth of 610 feet where 15 joints of 9 5/8" casing was run and landed at 609 feet. The casing was cemented with 300 sacks of regular Class G cement, with 2% Calcium Chloride, and 1/4# Flocele per sack added. Native mud was used to drill the surface hole, and run casing with no problems.

A 7 7/8" hole was drilled from under surface on the morning of January 1, 1980, and drilled to a driller's total depth of 7770 feet. Native mud was used to a depth of approximately 3500 feet where the system was mudded up. No hole problems were recorded to a casing depth of 5022 feet, where Core #1 was cut from 5022 to 5082 feet. Core #1 was cut and DST #1 was run with no problems. After running DST #1, the hole was drilled to 5753 feet with no problems. Approximately 700 barrels of fluid was lost at 5753 feet, but circulation was regained by the addition of LCM to the system. Core #2 was cut from 6500 to 6560 feet, and Core #3 was cut from 6560 to 6616 feet with no problems. DST #2 was run from 6490 to 6616 feet with no hole problems. Core #4 was cut from 7220 to 7280 feet with no hole problems. The well was drilled to total depth, logged and plugged without any hole problems.

Wyo-Ben United furnished the mud products, and the mud engineering on this well. Typical mud properties and a cost summary are shown below.

TYPICAL MUD PROPERTIES

DATE DEPTH WT VIS WL REMARKS

12/31/79

01/02/80

610

2990

NATIVE

NATIVE

Running Casing.

Drilling.

01/04/80 4164 9.0 32 9.8 Drilling.

01/08/80 5070 9.5 33 13.0 Coring and Testing.

01/14/80 6291 9.4 37 8.0 Drilling.

01/17/80 6582 9.3 38 14.0 Coring and Testing.

01/22/80 7280 9.3 45 10.5 Coring.

01/24/80 7770 9.5 60 8.8 Logging and Plugging.

Helton Engineering & Geological Services, Inc. Chevron-SONAT ill Zubrod Mud Summary Page 2.

COST SUMMARY

PRODUCT QUANTITY COST

Hydrogel 820 5,125.00

Caustic Soda 50 1,425.00

Lime 8 62.00

Salt 30 201.00

Soda Ash 34 986.00

Ammonium Nitrate 14 294.00

Sodium Hex. 8 388.00

Uni-Drill 40 2,360.00

Super Lube Flow 44 1,452.00

Driscose 47 7,614.00

Cedar Fiber 80 1,240.00

Cottonseed Hulls 20 160.00

Mica 80 1,080.00

Profiber 115 1,782.50

Rayvan 75 2,550.00

C.M.C. 12 1,944.00

Material 28,663.50 Sales Tax 1,146.54 Drayage 5,160.50

Total $ 34,970.54

Cost per foot = 34,970.54 = $4.50/ft. 7,770

Cost per day = 34,970.54 = $1295.21/day 27

The above averages do not include the cost of water used in the drilling fluid.

Recorder No Make Depth Inside or Outside

Measured length of tail pipe from base of lowest top pkr 52'

For straddles – Measured interval distance

Tail pipe OD wt/ft Length

Cushion: Type None ft. or press Cale. Hydro


DRILL STEM TEST REPORT

Well Name & Location DST No 1 Formation

TD 5082 Hole Size

Drill Pipe: OD 4 1 / 2 Wt

Drill Collars: OD 6 1/2 ID

Testing Co, Halliburton

Test Tool: Type HYdrosprimplom. OD

Packers: No. Run 2 OD Type

Perforated Pipe 52 ft. Perf. Size

Recorder No. 6223 Make

Recorder No. 6224 Make

Recorder No. Make

18" 1/8" Perfs/ft 24

0 Depth 5078 Inside or Outside In

Depth 5007 Inside or Outside Tn

Depth Inside or Outside

Chevron–SONAT #1 Zubrod Date Jan. 9, 1980

Gr Cap

wt/ft Cap

Type of Test Conventional

BH Choke1/4 Actuation

Rubber Length

Other Equip. – Describe Type & What Used

Jars

Reverse sub

Safety Jt

Sample Chamber

By-Pass Assembly

Tite Hole Subs

Hookwal

HP Manifold

Test Head

Other

Other Board 5280

Picked Up

Mission Canyon Test Interval 5030-5082 Hole Condition Good

7 7/8 Mud:Wt 9.7 Vis 41 WL Cale. Hydro

bbl/ft Pipe Cond Collapse Res

bbl/ft Min ID of subs Dart OD

Pipe Strap 5270 Measurements

Laid Down

DC No

DP Stds jt 31 447 ft

Overall test tools 0 ft jts

Subs

Total String

Less TD

Calculated Stickup

'String wt. off bottom 120 Pkr set 2:00 P.M. Wt. on pkr 40

Pkr Cond Time: Start Pickup 7 : 00 AM Tool Started 8 : 30 AM On bottom 1 : 45 PM Tool open 2 : 00 PM Final SI Complete 7 : 45 PM

Pulled loose 7 : 45 PM Out of hole 11:30 PM Were jars used No 1 ruined, 1 good

• Annulus Status. Start Full During Full Finish Full Flare Line Size & Type 2"

Preflow 2:00 Tim-

Choke

-

DP

Pre

Orifice

Pipe or

Riser Back Flow

:r11• .

2nd Flow 2:45

3rd Flow

CTS in None

Mud TS in None

TS in

— TS in PIDe Recover

Field Read Pressures

Preflow (1st) 15 ft. bbls Type Fluid I Hydros 2639 Final Hydro 2639

1st SI 30 3416 Gray Sulphur Water 1st Flow 270-513 1st SI 2262

2nd Flow 120 2nd Flow540-1672 2nd SI 2262

2nd SI 180 3rd Flow 3rd SI

3rd Flow Recorder 6223 Depth 5078

3rd SI Do recorders check ves Bottom Pkr He'd vas

Length 4574 ft

Length

ft

DOK @ TD

DP

DC

Subs

Total

Actual Measured Stickup when bottom agged 29

31

62

ft

ft

ft

Test tool overall

Subs, etc.

Total

Less Laid Down

Calculated Stickup

90

62

78

No. of Samples Collected for Analysis: Water

Samples Sent To:

Sample Chamber Recovery: 2240 cc's Water, no gas, no pressure, BHT 135 0 Water Res @ °F

•Blow Description • - • • k • • • hi - an with surface bubble, & continued for 55

Flow Rates: minutes, 8" bl ow in 65 minutes & 12" blow in 75 minutes Resistivity recovered water - .48 @ 84 ° - 1100 ppm Chlorides

Resistivity mud pit sample - 1.5 @ 50° - 525 ppm Chlorides

Resistivity mud pit sample filtrate - 1.42 @ 50 ° - 625 Chlorides

Nitrates in sample water 40 ppm: Nitrates in mud 250 ppm. John H. Hughes Tester Supervisor

4

Gas

Oil

Other

Remarks•

Form HE-D7


DRILL STEM TEST REPORT

Date Jan. 18, 1980

Hole Condition Good

Calc. Hydro

Collapse Res

of subs Dart OD

Well Name & Location Chevron— SONAT #1 Zubrod

DST No. 2 Formation Red River C Zone Test Interval 6490-6616

TD 6616 Hole Size 7 7/8 Mud:Wt 9.4 Vis 42 WL

Drill Pipe: OD 4 1/2 wt Gr Cap bbl/ft Pipe Cond

Drill Collars: OD 6 1/2 ID wt/ft Cap bbl/ft Min ID

Testing Co. lialliburton Type of Test Conventional

Test Tool: Ty peHydrospringNum. OD BH Choke 3/4Actuation

Packers: No. Run 2 OD 7" Type Rubber Length 18"

Perforated Pipe 61 ft Perf. Size 1/8" Perfs/ft 24 OD

Recorder No 6224 Make Depth

6612 id 6467 Inside or Or 0uottss iido e eTn Recorder No 6223 Make Depth

Recorder No Make Depth Inside or Outside

Recorder No. Make Depth Inside or Outside

Measured length of tail pipe from base of lowest top pkr 176

For straddles — Measured interval distance

Tail pipe OD wt/ft Length

Cushion: Type None ft or press Calc. Hydro

Pipe Strap Laid Down

Other Equip. — Describe Type & What Used

Jars X

Reverse sub X

Safety Jt

Sample Chamber X

By-Pass Assembly

Tite Hole Subs

Hookwall

HP Manifold

Test Head

Other

Other

Board Picked Up Measurements

100 6238 ft

100 ft

6631

Less TD

Actual Measured Stickup when bottom tagged 6616 15 Calculated Stickup

103 Pkr set 4:00 A.M. 70 String wt. off bottom Wt. on pkr

Time: Start Pickup 11 : 00 PMTool Started 12:00 PM On bottom 3:45 AM Tool open 4:00 AM Final SI Complete 7:45 AM

Pulled loose 7 : 50 Out of hole 2:00 PM Were jars used No Pkr Cond Good

Annulus Status. Start During 10' Drop Finish Flare Line Size & Type 2"

Preflow 4:00 Time

4:45

Choke

Size

DP

Press

Orifice

Size

Pipe or

Riser

Size

Back

Press

Flow

Rate Remarks

2nd Flow

3rd Flow

GIS in

Mud TS in

TS in

TS in Pressure — , ....

Preflow (1st) 15 f . bbls Type Fluid I Hydros 3227 Final Hydro an_ 1st SI 30 5750 81 Water 1st Flow 648- 1349 1st SI 2906

2nd Flow 60 2nd Flow1510-2691 2nd SI 2959

2nd SI 170 3rd Flow 3rd SI

3rd Flow Recorder 6223 Depth 6612

3rd SI Do recorders check yes Bottom Pkr Reid yes

DC No

DP Stds

Overall test tools

Subs

Total String

Length

Length

DOK @ TD

DP

DC

Subs

Total

It

its

32 ft

62 ft

ft

ft

94

Test tool overall

Subs, etc.

Total

Less Laid Down

Calculated Stickup

100 94

6

No. of Samples Collected for Analysis: Water

Gas

Oil

Other

Samples Sent To:

Sample Chamber Recovery:

2240 cc's Water, no gas, no pressure. Water Res @ °F

OM of

r. • Blow Description Preflow be an surface blow in 2 minutes bot •

Flow Rates

Remarks .

bottom of bucket and continued to end of flow. Resistivity Mud - 1.78 @ 65 ° - 3400 ppm Chlorides BHT 150° Resistivity Mud Filtrate 1.35 @ 60° - 5000 ppm Chlorides Resistivity Rec. Water .16 @ 75° - 42,000 ppm Chlorides Nitrates in Sampler 44 ppm, Nitrates in mud 230 !Tim

Tester Supervisor John H. Hughes

Form HE-D7

HELTON ENGINEERING & GEOLOGICAL SERVICES, INC. PLUG-BACK AND ABANDONMENT REPORT

SW NE Sec. 18-T22N-R21E

Well Name: Chevron-SONAT #1 Zubrod Location• Corson County, South Dakota

Operator approval to plug obtained from (Name) Pat Patterson on January 25, 1980

Regulatory approval to plug granted by (Name) Fred Stece of (Regulatory Board) on January 25, 1980

Hole Size 12 1/4 7 7/8 KB Elevation 2271

7773 Schlumberger

Total Depth 7770 Driller Depth 610 7770

Fluid in Hole Mud CASING IN HOLE SIZE SET AT TOP OF CEMENT

Surface Casing 9 5/8 609 Surface Plug Back String Drill Pipe

Intermediate Service Company Halliburton

Production String Regulatory Official Fred Stece

PI 116: 1 PI LIG 7 PI 1161 PI 116 4 PI 11r, F PI lln 8

Date 1-26-80 1-26-80 1-26-80 1-26-80

Interval - Top Bottom

6400 6700

4900 5200

3500 3600

550 650

Formation - Name Depth

Red River 6500

M. Canyon 4998

Jurassic 3470

Btm. Csg. 610

Calipered Hole Size (Average)

7 7/8 7 7/8 7 7/8 7 7/8

Type of Cement Class G Class G Class G Class G

No. of Sacks 100 100 40 40

Additives

Bbls of Water Ahead Displacement - Bbls Water

Bbls Mud

Slurry Weight Mixing Times - Start

Finish Displacing Times - Start

Finish

Felt Plug Time

Felt Plug Depth

3' 10 Surface Casing Cut Ft Below Ground Surface Plug

Plate Welded -69No

No. of Jts. Recovered

Remarks

Sacks from Surf aceto 20'

DH Markd Installed - Ye No Ft CASING SALVAGE: Shot off at

None

Supervisor• Don Connars

Form HE-D8

C

m

7J

C V) 2

or

FLUID SAMPLE DATA Ticket 32 Dote 1-9-80 Number 745920 Lir

Sampler Pressure .P.S.I.G. at Surface Kind OPEN HOLE Holliburton V .,

Recovery: Cu. Ft. Gas of Job PACKER DST District GLENDIVE zi

cc. Oil a

cc. Water 2240 Tester MR. MC COWAN Witness MR. CANNON

cc. Mud Drilling Tot. Liquid cc. 2240 contractor BOMAC DRILLING COMPANY #32 bj

Gravity • API @ • F. EQUIPMENT 8 HOLE DATA t3-

Mud Pit Sample Filtratei 42 @ So °F. 675 ppm Drill Pipe Length 4590' I.D. 3.826"

Gas/Oil Ratio cu. ft./bbl. Formation Tested Mission Canyon r

CONTENT RESISTIVITY CHLORIDE Elevation 2271' KB Ft. ..;

Recovery Water .48 @84 °F. PPm All Depths Measured From Kelly Bushing r

Recovery Mud 1• 0 @ 55 F. 800 ppm Total Depth 5082' Ft r

Net Productive Interval 81 Ft. 1-

Recovery Mud Filtrate @ °F. ppm Main Hole/Casing Size 7 7/8" Mud Pit Sample 1. 5 @ 50 F. 525 Wm Drill Collor Length 447' I.D. 2.25"

Packer Depths) 5022' 5030' Ft Mud Weight 9.7 vis 41 Snr =g, Depth Tester Valve 5006' Ft

TYPE AMOUNT Depth Back Surface Bottom Cushion Ft. • Pres. Valve Choke .25" Choke 75,.

_

Recovered 3416 Feet of water. 2 's

-4 3 7; ' I < / e

•

Recovered Feet of

Recovered Feet of

Recovered Feet of ii !

Recovered Feet of

Remarks SEE PRODUCTION TEST DATA SHFFT....

c

TEMPERATURE Gouge No. 6224 Gauge No. 6223 Gauge No.

Depth: 5007 Ft. Depth: 5078' Ft. Depth: Ft. TIME

24 Hour Clock 24 Hour Clock Hour Clock Tool A.M.

Est. °F. Blanked Off NO Blanked Off YFS Blanked Off Opened 1400 P.M.

Actual 135 'F. Pressures Pressures Pressures Bypass 1945 P.M. Opened A.M.

Field Office Field Office Field Office Reported Computed

Initial Hydrostatic 2519 2568.2 2639 7600.9 Minutes Minutes

.2 Flow Initial 219 153.8 270 56.7 ...

& Si

Final 384 412.0 513 467.5 15 16

Initial 461.5 540 543.7 1:2 Flow

Closed in 2191 2224.0 2262 7260.0 30 30

gl Final 1590 1587.4 1672 1631.7 120 124 Closed in 2246 2232 2 2262 7273.4 180 175

Initial 21 Flow Final 4i.

Closed in Final Hydrostatic 2519 2475.4 2639 2511 5-0

O.= QUESTIONABLE

z

O C

O

t1 i a z

a, O Lai O

O

cn O CO

C n

70 (/) O

FORM 1•1-111-FAINTED IN U.S.A. FORMATION TEST DATA

LITTLE'S ON sin

745920 Bottom Surf temp •F Ticket No

Casing perfs. choke

Oil GOR Gas gravity gravity Res. @ •F Chloride• ppm

DEVICE USED Spec. gravity INDICATE TYPE AND SIZE OF GAS MEASURING

Date

Time a.m.

P.m.

Choke size

Surface Pressure

Psi

Gas Rate MCF

Liquid Rate BPD

Remarks

1400 AM Opened tool with no blow.

1415 Closed tool with no blow. Manifold

plugged.

1445 Opened tool - surface blow.

1530 1" blow.

1540 2" blow.

1545 4" blow.

1550 6" blow.

1600 8" blow.

1605 12" blow. Botton of bucket.

1645 " ..

1645 Closed tool. Blow remained at bottom

1945 of bucket. Pulled tool loose and

opened bypass.

r r

ORMIS PRINTEDMVfl. PRODUCTION TEST DATA

LITTLE" 0111172 •p

Third ,sed In Pressure

..doe I 'Owes. DI Sd

;our No. 6223 Depth 5078' Cloc k No. 2000 24 hour

Minutes t

Ticket 745920 No.

■

00awU

Third Flow Per iod

'WO)

rat

Jnoy .17z

.100 !1_

I Cloc k No. 1 69 79

."('D

away 9154

I-1587. 4 1 1 WZIIZ 1 IsI9i31

12180. 3 1 6'E6131

I I'ET331

1221 5.8 1 1 5.8133 1 EIZZZI

2226. 7 [ 12226. 7 1 12229. 5 1 z•zczz

2232. 2 1 I rIE9I1 1 0.0SIZI

12 201. 0 12219. 8 1 2230. 5 1 2241. 2 1 2246. 6 2252. 0 1 225 7. 3 1 2260. 0 1 2262. 7 1 2265. 4 11 11'8933

1 I'8933 1 VOLZZ 1

'REMARKS: * INTERVAL = 1 MINUTE ** INTERVAL = 24 MI NUTES *** I NTERVAL = 7 MI NUTI

[20331 3'LOZZ

Second sed In Presst

9 0 + 4 6°1

L9tS:1

Time Deli. .0MW

0000' **ZCZO•

1190' 630I• 82.1n• 9Z8I. t'ZZZ• 1392' IZOr OZVE• 8I8E•

n9IZir 5•1911 HOS. ZIVS• 0I8S'

0000' **SEZO'

LE90. OVOI•

St8I• Lt3Z• 059Z. zsoci SSVE• LS8L1 09Ztt• Z9911 5905.

1 Depth 5007 '

Second Flow Per iod .."31

'Owes 515d

1 919t 1 0.I9L 1 0'686

1174. 8 1336. 0 I16'69b1

1587. 41

rEtS 1 9128 10.EVOI 1I.EZZI 10.6LEI WEISI

I .00ce 100.0

0000' 1 <41080. 1

08171' 1 1 I zsiz*

6283' 1 I L6t1 •

oat.

ip000• F.;£080.

ELVI• 171 Z •

1 11£3Z• I 0817£' I (19itt•

%imp dual DISd

I 029 11'9681

2032. 7 1 2092. 81 2128. 4 1 2150. 2 1 j9.9913

2180. 3 1 2188. 5 1 2196. 7 1 2202. 1 1 2 207. 6 1 LUEIZZ

2215. 8 11 2218. 5 1 2224. 0 1'

5.L9V 16'81761

2083. 1 1 2134. 0 1 16.891Z

2193. 0 1 2209. 1 1 2219. 8 1 2227. 8 1 2235. 9 1

III

2241. 2 1 2246. 6 1 2252. 0 1 2254. 6 1 2257. 31

1 10.0932

p339 113N e6nc0

First ,sed In Presst

9 0 ±l

001

.000"

0000' 8900' 9EIO• 17030' ZLZO' 01710. 80VO• 9L-170. 171790. ZI9O• 0890' 8bLO• 9180' 17880. Z560. 0301'

I 8900' II 9.5/7 9EI0' II EWE'

lial VOW' I1 i'9911 UN' 1 17.981' our II s'utl 80170. Bala

it-B

illill

I *no. 11 1 3960• II

OZOT II

-dual 515d

IFFEST

6113 117.0IE

1911/81 1 0 I t?

First Flow Pei

„000" 100 owl!

0000' #1100.

0170' 8330. SZEW Eat0. 0350'

ME

DA1041.11 DU pi

Lcu ISU

of

zl el 1'1_1

sl

11_1

ofi

II

el

LSI]

}—

L QL

< 0 WN

VJ

-J

n.

ues O. D. I. D. LENGTH DEPTH

Drill Pipe or Tubing

Reversing Sub 695" 2 25 1 ' 1.00' 90' Up

I P.!! Water Cushion Valve

Drill Pipe 4.50 Drill Collars 6.25"

DOUBLE 6.25"

3.826" 2.25" 2.25"

4590'? 447'? 1.00' - PIN 4" Reg.x 31/2 FH

Dual CIP Valve

Dual CIP Sampler 5.00" Hydro-Spring Tester 5.00"

.75"

.75" 7.00' 5.00' 5006'

4995'

Multiple CIP Sampler

Extension Joint

AP Running Case 5.00"

3.06"

4.00' 5007'

Hydraulic Jar 5.00"

1.75"

5.00'

VR Safety Joint . 5.00"

1.00"

2.75' Pressure Equalizing Crossover

Packer Assembly 7.00"

1.53"

6.00' 5022'

Distributor 5.00"

1.68"

2.00'

Pocker Assembly 7.00"

1.53"

6.00' 5030'

Flush Joint Anchor

Pressure Equalizing Tube

Blanked-Off B.T. Running Case

Drill Collars

Anchor Pipe Safety Joint

Packer Assembly

Distributor

Pocker Assembly


Side Wall Anchor

Drill Collars

Flush Joint Anchor

El Blanked-Off B.T. Running Case

Total Depth

5.00"

5.00"

2 17" 4R'

2.44" 4.00' 5078'

5082 '

TICKET NO. 745920

EQUIPMENT DATA

LITTLE'S •114715 75C • •

2

0

;I

0

r

ES

0

n

C

70 C O

0 O

rt O

0"

70 O

C

O

Dr. —4

o F

0

N) N)

NS

rn

e

r

0

0 O

in

0 C

0

FLUID SAMPLE DATA Ticket Dote 1-18-80 Number 745921

Sampler Pressure .P.S.I.G. at Surface Kind OPEN HOLE Halliburton of Job PACKER DST District GLENDIVE Recovery: Cu. Ft.

cc. Oil

CC. Water

cc. Mud

Tot. Liquid

Gravity

Gas

Tester MR. MC COWAN Witness MR. CONNORS 2240 Drilling Contractor BOMAC DRILLING COMPANY #32 V

EQUIPMENT & HOLE DATA cc. 2240

• API @ ' °F.

Gas/Oil Ratio cu. ft./bbl.

PPm

CONTENT Net

All

Formation Tested Red River

Recovery Water

Recovery Mud

Recovery Mud Filtrate

Mud Pit Sample

Mud Pit Sample Filtrate

Mud Weight

RESISTIVITY CHLORIDE

.16 @ 75 • F. 42000

Elevation 2271' KB Ft .

Total

Productive Interval

Depths Measured

Depth

— Ft.

From Kelly Bushing @ °F. DPI, 6616' Ft.

@ °F. ppm Main

Drill

Drill

Packer

Hole/Casing

Collor Length

Pipe Length

Depth(s)

Size 7 7/8" 1.78@ 65 'F. 3400 ppm 293' I.D. 2 25"

3.826" . 1.35 @ 60 'F. 5000 PP"' 6176' I.D.

9.4 vis 42 Sec. =cP

6482' 6490' Ft.

Depth Tester Valve 6466' Ft

TYPE AMOUNT Depth Back Surfoce Bottom Cushion Ft. Pres. Valve Choke .25" Choke 7S "

Recovered 5750 Feet of water-trace of mud top 200'

Recovered Feet of

!a. F

rom

Te

st e

r V

alve

Recovered Feet of

Recovered Feet of

Recovered Feet of

Remarks SEE PRODUCTION TEST DATA SHEET....

TEMPERATURE Gauge No. 6224

6467' Depth: Ft.

Gauge No. 6223 6612' Depth: Ft.

Gauge No.

Depth: Ft. TIME

Est. •F.


Opened 0400 P.M. Blanked Off Blanked Off Blanked Off

Actual 150 •F. Pressures Pressures Pressures

Opened

Bypass 0745

Reported Computed

A.M.

P.M.

Field Office Field Office Field Office


Flow Initial 604 568.6

1281.4 648 1349

678.3 1365.5 15 17

a Final a. 1262

Closed in 2847 2825.1 2906 2892.7 30 31 Initial

7 1 Flow 1426 1415.2 1510 1508.0 -- Final

Al. 2519 2557.3 2691 2630.0 60 60 Closed in 2847 2860.6 2959 2930.3 120 119

Initial 121 Flow

Final ,

Closed in

Final Hydrostatic 3174 1111.5 3227 3195.1

FOAM 161-1.11.—PRINTED IN U.S.A. FORMATION TEST DATA

LITTLE'S n671 ION Phi

Casing Bottom choke Surf temp •F Ticket No 745921 perfs

Gas Oil gravity GOR gravity Res. @ 'F Spec. Chlorides ppm gravity

INDICATE TYPE AND SIZE OF GAS MEASURING DEVICE USED

Dote

Time a.m.

P.m.

Choke Size

Surface Pressure

psi

Gas Rate MCF

Liquid Rate BPD

Remarks

0401 Opened tool with a surface blow.

0402 3

0410 4

0415 6 Closed tool.

0420 5

0430-0445 4

0445 Opened tool.

0450 4

0500 5

0510 9

0515-053C 10

0545 5 Closed tool.

0600 2

0610 1

0620 2" blow.

0630 Surface bubble.

0640 No blow.

0745 Pulled tool loose.

FORM 1.11.2-1/1—ARINTED IN U.S.A. PRODUCTION TEST DATA

Ci

0 L/TTLE'S Dan SM 11/74

Pr

I

.4103

"CILIJOI

9ISd

I Gauge No. 6223 Depth 661 2 ' Clock No. 16969 24 hour

5alfluRAI

S3.111NIk

1

Third Ised In Pressu

9

Ticket No. 745921

.000' efo a

I 1

Third Flow Per iod

'itio3 'dual 9ISd

24 hour

,,000 "1.100 awl!.

I ."0D &mai. 9

ISd

E•tsil II trottal

12797. 8 11 ruszi

128 30. 5 d 12833. 3 11 12838. 7 11 12844. 2 11 12846. 9 11 1849. 7 11 1 2855. 1 2857. 9 11 2857. 9 11 11 9'09821 r

11 9'098Z

11 G-0E921 L L178Li

1 9-1:19H 0.Z13

r

z6211 I 13"006Z lin°1621 F-B-1311671 1 Z-1116Z =g

G GC6Zi

innZ6Z1

C 03

Clock No. 2000 0

TES *** INTERV AL = 7 I

Second Closed In Press,.

I 9 „„j Time Defl. .000•

0000'l

zoso.l 69L0 ' 1

LCOVI vow z flt5I-1 6E81'1

r Lou.' taz•I Zt9Z•1 606Z' Lac•I vttc•I ZT LC •1

F 086E'l

1 13000 -I **Lau

1.9LU 1:1 9201.± lb6]

955I 1 TZBli

13UL -1 (ISFC"-

ps-193.1 088Z:1 St7TE:i•

1_ 17L91.: "1

0

.zy Cr

P-

150RJA

aT11. ISLIblie4 1'1/£1/ 21' 1/£1/2 He - V1756 ILO:0E9Z

°I

NTERVAL = 3 MI NU

Depth 646 7 '

Second Flow Per iod

'103 dwal

9ISd

12•SIVI

1745. K 2019. 1 1 Ils.sizz

2362. 31 11 it'ute I

2 5 5 7. 3 1

uuoU"

UGOI 09E1. UUL L

.

. .

OtOZ

Time De f I. .000"

mw o 1 SECO' 1 LL90 I I stot-

£911 •1 1 2691'

0102' 1

S 591.: L

9 USCG

1..•377

33

» 17

147g71411 OWES WOW=

2247_ 1

11111111111111.

3

6 LS83_1

1773

7131

3..7

7)777'

go I

• I I I

7/1/17

•

II 1'n‘1 I

NI

I

NTE RVAL = 2 MINUTES ** I

First Closed In Pressure

1103 'Meal 9ISd

•T8ZT 16'ISSZ 117• 8292

2674. 8 1 2704. 9 1 t •62L2 1

2745. 8 1 2762. 2 1 16'SLL2 1

2786. 8 1 10.96LZ

1 2800. 5 1 2805. 9 1 1''1182

16'9182

2825. 1 1

17329 .oN abnoa

71)77)3331•1•1•.. 4 7331171)313' • • '

) ) 1111'•373•))1 1

ULUL MEM

:0' nal

is is Eau

1.

Mal 1620' :220'

*:.00.! 1100'

Time Def I.

0000• I ke.40010'

9910' 1 3E30' 1 6630' 1 9910' Z1t70 ' 1 86170' 1/990' 1190' L690' t9L0 • 0180' 9680' £960' 0101'

311

7)33•••

)1)71'1

.1".111

73)3314

3.631T '8L6

S'0178 8'169 £'8L9

Reading Interval 3 11 I REMAR KS' * fl

First Flow Period

'1103 away 9ISd

9 • 895 6.9LS

1 L'6IL 1 I'LS8

'9101 17'8Sn p•NzT

)173)7)

7))• -31

77113'1

' 91170'

WO* 9910'

-2900' 0000'

Time De fl.

0000' 49900'

9910' 1920'

CN

.1

VD

M

0, 19t/O'

0

"ID 0

LE

I

11_1 1±7_1

191 1,1 1_61 of

zl 11_1

E11

- I I

9

k

£

C

n

of

zl [pi VI

1511

0

a. us

eo

an at

IoI Ii

TICKET NO. 745921

•

0. D. I. D. LENGTH DEPTH

Drill Pipe or Tubing 90' UP 4 Reversing Sub 1/2 H-90 6 25" 2 25" nn.

Water Cushion Valve

Drill Pipe 4.50" 3.826" 6176' Drill Collars 6.25" 2.25" 293' Handling Sub & Choke Assembly

Dual CIP Valve

Dual CIP Sampler 5.00" .75" 7.00' 6455' Hydro-Spring Tester .75" 5.00' 6466'


Extension Joint

AP Running Case 5.00" 3.06" 4.00' 6467'

Hydraulic Jar 5.00" 1.75" 5.00'

VR Safety Joint . 5.00" 1.00" 2.75' Pressure Equalizing Crossover

Packer Assembly 7.00" 1.53" 6.00' 6482'

Distributor 5.00" 1.68" 2.00'

Packer Assembly 7.00" 1 53" 6.00' 6440'

Flush Joint Anchor

Pressure Equalizing Tube .


Drill Collars


Packer Assembly

Distributor

Packer Assembly

ul

it 11


Side Woll Anchor

Drill Collars

a Flush Joint Anchor

Blanked-Off B.T. Running Cose

i Total Depth

6 25" 2 25" 61'

2.25" 61'

5.00" 2.44" 4.00' 6612'

6616'

FORMH1741I-PRMTEDINLLS,A.

EQUIPMENT DATA

/C? LITTLE'S EWE ElIC 11/71


Chevron-SONAT #1 Zubrod SW NE Section 18: T22N - R21E Corson County, South Dakota

DISTRIBUTION LIST

Chevron, U.S.A. Inc. (3 )

Attention: Mr. Bob Hobart P. O. Box 599 Denver, CO 80201

SONAT Exploration (1) Attention: Mr. Keith Shanley P. O. Box 1513 Houston, TX 77001

South Dakota Geological Survey (2) Attention: Mr. Fred Steece 308 West Blvd. Rapid City, SD 57701

TIMF ...-,-.-,-..... .....41.

Each Horizontal Line Equal to 1000 p.s.i.

9 FORMATION TEST DATA LITTLE'• 04571 OM •/74 FORM 181.111-PRINTOD IN U.•.A.

FLUID SAMPLE DATA Ticket Dote 1-18-80 Number 745921

Sampler Pressure .P.S.I.G. at Surface Kind OPEN HOLE Hol I iburton of Job PACKER DST District GLENDIVE Recovery: Cu. Ft.

cc. Oil

cc. Water

cc. Mud

Tot. Liquid

Gravity

Gas

Tester MR. MC COWAN Witness MR. CONNORS 2240 Drilling Contractor BOMAC DRILLING COMPANY #32 hj

EQUIPMENT & HOLE DATA

cc. 2240 • API @ °F.


ppm

CONTENT

All

Formation

Elevation

Tested Red River

Recovery Water

Recovery Mud


Mud Pit Sample

Mud Pit Sample Filtrate

Mud Weight

RESISTIVITY CHLORIDE

.16 @ 75 ° F. 42000

2271' KB Ft.

Net

Total

Productive Interval

Depths Measured

Depth

- Ft.

From Kelly Bushing @ °F. ppm 6616' Ft

@ °F. ppm Moin

Drill

Drill

Packer

Hole/Casing

Collar Length

Pipe Length

Depth(s)

Size 7 7/8" 1.78 @ 65 ° F. 3400 Pam 293' I.D. 2 25" 1.35 @ 60 ° F. 5000 PPrn 6176' I.D. 3 826"

9.4 vis 42 Sec. -T-FP

6482' 6490' Ft

Depth Tester Valve 6466' Ft

TYPE AMOUNT Depth Bock Surface Bottom Cushion Ft. Pres. Valve Choke .25" Choke 75 II

Recovered 5750 Feetof water-trace of mud top 200'

Recovered Feet of

Recovered Feet of

n T

este

r Va

lve Recovered Feet of

Recovered Feet of

Remarks SEE PRODUCTION TEST DATA SHEET....

TEMPERATURE Gouge No. 6224 Depth: 6467' Ft.

Gauge No. 6223 Depth: 6612' Ft.

Gouge No.

Depth: Ft. TIME

Est. •F.


Opened 0400 P.M. Blanked Off Blanked Off Blanked Off

Actual 150 •p. Pressures Pressures Pm-sawn

Opened

Bypass 0745 Reported

A.M.

P.M. Computed

Field Office Field Office Field Office


.. Initial

.3 Flow 604 568.6 648 678.3 gi Final 4 1262 1281.4 1349 1365.5 15 17

Closed in 2847 2825.1 2906 2892.7 30 31 Initial 1426 1415.2 2'8 Flow

1510 1508.0 ..., F i nal :ft. 2519 2557.3 2691 2630.0 60 60

Closed in 2847 2860.6 2959 2930.3 120 119 Initial

2 18 Flow Fc, Final

Closed in

Final Hydrostatic 3174 3131.5 3227 3195.1

f-1

Tor

O

r ea

0

3

a

z

z

e

N7

rn a 0 0

0

01 h•-■

3

CO CO

N

nT

E."

-•

a O 7C

Casing Bottom choke Surf temp Ticket No 745921 perfs. ---•F

Gas Oil gravity GOR gravity Res @ •F Spec. Chloride' ppm gravity

INDICATE TYPE AND SIZE OF GAS MEASURING DEVICE usEn

Date

Time CLITI.

P.m.

Choke Size

Surface Pressure

psi

Gos Rate MCF

Liquid Rate BPD

Remarks

0401 Opened tool with a surface blow.

0402 3

0410 4

0415 6 Closed tool.

0420 5

0430-044E 4

0445 Opened tool.

0450 4

0500 5

0510 9

0515-053C 10

0545 5 Closed tool.

0600 2

0610 1

0620 2" blow.

0630 Surface bubble.

0640 No blow.

0745 Pulled tool loose.

FORM IN-RI-PRINTED IN U.E.I. PRODUCTION TEST DATA

Q LITTLE' 55572 51,1 S/74

Third Ised In Pressure

110)

'Mewl DiScl

I Gauge No. 6223 Depth 661 2' Clock No. 16969 24 hour

7

salmi w S31AN5

„__1

Ticket No. 745921

aoo

I -1

Third Flow Period 1 no)

dual DISd

Army vz

Time Defl. .000•

. .. ..

..

. ..

'ex° dwal DISd

12557. 3 I 2770. 4 I L6L7

2811. 4 I 2822. 3 2830. 5 I 2833. 3 2838. 7 I 2844.2 12846. 9 I 2849. 7 I 2855. 1 I 12857. 9 I 12857. 9 1 2860. 6 I 1 9.0987

e r 62T

I

co 4 L = 1VADINI **x. S31 Clock No. 20000

Second Closed In Press..

9 +

„oar paaawl

.0000

I . 0234 * . zoso 69L0 LEOT'

usI-1 6ETW A 1 LO' tuzl Z17931 6063' LLTE•1 fittEl ZILE 1 0861 •1

1-0000.1

:

Imam I

144 I

gli

51:10C

.1, =

E- 11111 l a= 111=11

III

I£'1

1

1508. 0 1

m=1 MM. LIMA Elegtd1 maul

111111 I

_1 OT 1

_

NTERVAL = 3 M INU

Depth 646 7 '

II Second Flow Per iod

'<Weal DIScl

izssIti 1119bLI II•6107

I 2218. 5 I 2362. 31 I 2478. 11

2557. 3[ I--

I 0000'

mats massii RIES NMI

111111

w;:::',.11 0000' SECO' LL90' STOT E9ET ' 1 7691' ocoz'l

L

1 2847. 1 I I 116.L583J

177 'Petri I

2882. 0 F2887. 4 1 1 I

NTERVAL = 2 MINUTES **

First psed In Pressure

110) dal 9154

It'IRZI

2551. 9 2628. 4 26 74. 8 2704. 9 1 2729. 4 2745. 8

1 2762. 2 1 6 •SLLZ 1 18.9812

2795. 0 1 1 2800. 5

2805. 9 1 1 2811. 4 1 16'9187 1

2825. 1 1

1365. 5

PETRI immri gum EMI

2833. 7

17339 IDN 8611°0

I +

0000' tq:310:1 UZ20'

7

F£670'

7

85E0'

i311#(9)::i

1

_APE]

7

VU90•1

7

617L0'1

61130'1

otori

'MOW WaawM1

0000' **00T0'

9910' 7E70' 6670. 99E0'

86.170' t/990' TE90' L690'

0180' 9680' £960' 010T'

1 E "13L9 8169 _

1 9 'Ot79 £'8L6

I 7 .

7

p .6ZIT

. 1 I

1

y-Lvei

I

Readina Interval 3 1 14

..1")

'Ousel MSc!

9'899 6'919

1 L 'EEL 1 *L913

.9TOT O'SSIT

.-.1

0000' 1 ,3900.

I

99T0*

7

WO.

7 I I

EttE0'

7 " 1 7

9E170. 0E50:

I I 7

First Flow Pe

ACC Weameill

0000' *9900. 1 99T0'

PI

tO

CNI 0 . (NJ Lel Ce7 0 . I9VO•

0

7.0 L.0 0

j 1E1

11_1 16_1 of II ZLI el rI sl

....

1_1

1_6_1 r±Li zl ei bl

Sl

P RIN TED IN U II. A.

9

TICKET NO. 745921

IIAI Drill Pipe or Tubing

Reversing Sub 41/2 H-90

Water Cushion Valve

Ir us

Drill Pipe

Drill Collars

Handling Sub E. Choke Assembly

Dual CIP Valve

Dual CIP Sampler

Hydro-Spring Tester


Extension Joint

AP Running Case

Hydraulic Jar

VR safety Joint

JEI

It

Ill

Packer Assembly

Distributor

Packer Assembly

Pressure Equalizing Crossover

0. D. 1. D. LENGTH DEPTH

90' UP 6 25" 2 25" 1 nn.

4.50" 3.826" 6176' 6.25" 2.25" 293'

5.00" .75" 7.00' 6455' 5.00" .75" 5.00' 6466'

6467' 5.00" 3.06" 4.00'

5.00" 1.75" 5.00'

6482'

5.00" 1.00" 2.75'

7.00" 1.53" 6.00'

5.00" 1.68" 2.00'

64110' 7.00" 1.53" 6.00'

Flush Joint Anchor



Drill Collars

Anchor Pipe Safety Joint III I•1

Packer Assembly

It Distributor

Packer Assembly

11•1


Side Wall Anchor

Drill Collars

Flush Joint Anchor

0 Blanked-Off B.T. Running Case

Total Depth

6 25" 2 25" 61'

5.00" 2.25" 61'

5.00" 2.44" 4.00' 6612'

66 1 6'

FORM 117-RM.-PRINTED IN U.S.A. EQUIPMENT DATA

15? LITTLE, *WS 7SC 1/711

TIME

• i(6

Each Horizontal Line Equal to 1000 p.s.i.

co

no no

IV N'a rn

z

2

Et

0

I-

Ir

C

O

c-)

0

r 0

I

FLUID SAMPLE DATA Ticket Dote 1-9-80 N umber 745920

Sampler Pressure P.S.I.G. at Surface Kind OPEN HOLE Holliburton of Job PACKER DST District GLENDIVE Recovery: Cu. Ft.

cc. Oil

cc. Water

cc. Mud

Tot. Liquid

Gravity

Gas

Tester MR. MC COWAN Witness MR. CANNON 2240 Drilling Contractor BOMAC DRILLING COMPANY #32 bj cc. 2240

° API @ °F. EQUIPMENT 8 HOLE DATA


ppm All

Formation Tested Mission Canyon

Recovery Water

Recovery Mud


Mud Pit Sample

Mud Pit Sample Filtrate!

Mud Weight

RESISTIVITY CHLORIDE CONTENT

, 48 @84 'IF :

Elevation 2271' KB Ft.

Net

Total

Productive Interval

Depths Measured

Depth

8 ' Ft.

From Kelly Bushing 1.0 @ 55 ° F. 800 ppm 5082' Ft

@ °F. ppm Main

Drill

Drill

Packer

Hole/Casing

Collar Length

Pipe Length

Depth(s)

Size 7 7/8" 1.5 @ 50 *F ' 525 ppm 447' I.D. 2.25"

. 42 @ se °F. 675 ppm 4590' I.D. 3.826"

9.7 vis 41 Sec- =21)

5022' 5030' Ft. Depth Tester Valve .5006' Ft

TYPE AMOUNT Depth Back Surface Bottom Cushion Ft. Pres. Valve Choke . 25" Choke . 75"

Recovered 3416 Fir° a water.

Recovered Feet of

Recovered Feet of

Recovered Feet of

:t V

olvo

Recovered Feet of

Remarks SEE PRODUCTION TEST DATA SHFFT....

TEMPERATURE Gauge No. 6224 Depth: 5007 Ft.

Gouge No. 6223 Depth: 5078' Ft

Gouge No.

Depth: Ft. TIME

Est. 'F.


Opened 1400 P.M. Blanked Off NO Blanked Off YFS Blanked Off

Actual 135 F. Pressures Pressures Pressures

Opened A.M.

Bypass 1945 P.M.

Field Office Field Office Field Office Reported Computed

Initial Hydrostatic 2519 2568.2 2639 2600 5 Minutes Minutes

Initial 219 153.8 270 56.7 0. 1

Final Flow

384 412.0 513 467.5 16 15 Closed in 2191 2224.0 2262 2760.0 30 30

Initial n Flow 439 461.5 540 641 7

Fina l r 1590 1587.4 1672 1611.7 120 124 Closed in 2246 2232.2 2262 7273.4 180 175

I 21 Flow

Initial

li Final

Closed in

Final Hydrostatic 2519 7475.4 2639 2513_ 5-0 O.= OUEETIONABLE

FORM 101-R1--PRINTED IN U.S.A. FORMATION TEST DATA

LITTLE'S •N71 ON 4/74

Casing pads Bottom dick. cud temp •F Ticket No 745920

Gas gravity Oil gravity GOP

SP.:. gravity Chlorides ppm Res f& •F INDICATE TYPE AND SIZE OF GAS MEASURING DEVICE USEIs

Date

Time a.m.

P.m.

Choke size

Surface Pressure

Psi

Gas Rate MCF

Liquid Rate BPD

Remarks

1400 AM Opened tool with no blow.

1415 Closed tool with no blow. Manifold

plugged.

1445 Opened tool - surface blow.

1530 1" blow.

1540 2" blow.

1545 4" blow.

1550 6" blow.

1600 8" blow.

1605 12" blow. Botton of bucket.

1645 II Il II

1645 Closed tool. Blow remained at bottom

1945 of bucket. Pulled tool loose and

opened bypass.

FORM 102-R1-”PRINTED IN U.S.A. PRODUCTION TEST DATA

POST2 BM ilp

'away DiSd

;auge No. 6223 Depth 5078' Clock No. 2000 24 hour

la4auwi

II I

I

Ticket 745920 No.

Third wed In Presst

9

+ boi Time DeM mo•

Third Flow Per iod

wop Away 9184

'nog yz

ua autl.

Clock No. 16979

'.1103 Away D/Sd

[ trtesI Lo'ziu

1 6.E613 Tezozzl

1-910331

2213. 1 1 2215.8 1 2218. 5 I c-tz.

1 L'9ZZZ1

1 1 S.6ZZZ

2232. 2 1 2232. 2 1

L'IE9I

2150. 0 1 2201. 0 1 1 8.0IZZ

S'OEZZ 1 2241. 2 1 9.9122 1 O'ZSZZ

2257. 3 1 0.0933

2262. 7 1 i 1159ZZ I I '89ZZ pram__ 11 OLZZ

C. .

r■

C

\ N

NAL = 24 MINUTES *** INTERVAL =_7 MINUT1

2 18(

Second wed In Presst

9 0 + 4 121°1

Time Deft. .000'

0000 -I **ZE30.1

IE90.1 6ZOI'l

93811 tzzz • EZ9Z.1 IZI 031 8181 9131 9I9r1 EII Zit 0185'1

1 00001 F**SEZ0s1

LE901 1 Ot0I'l n ton •

91781•1 LtZZ'l 05931 ZSOCI1 5917£11

1---n8E1 093111 Z99.17.1 5905.1 L91/9"

C

U")

it009 tpdaa

and Per iod

9154

1-0**19L 1 0'686 is-tat 1019EEI 6.69bI

1587. 4

I nts 1 9'138

1043. 01 1223. 1 1 10'6LEI

C

WtZliCraTAIll

0000- L080. 08tI. 1 3SIZ'

5383'I L61/£' Oar 1

0000' <4E080' 1

CLI7I. 1 'ou' 1 II83._1

091.11 0817C.

4103 .dway 9154

n o-t 11'9681 IL.ZE0i

2092. 81 2128. 41 2150. 21 19'9912

2180. 3 1 2188. 5 1 1L'963

2202. 1 1

2215. 8 1 2218. 5 1 2224. 0 1

91%! 16.8t61

2083. 1 1 21 34. 0 1 1_6'891Z

2193. 0 2209. 1 2219. 8 1 2227. 81 223 5. 9 1 2241. 2 1 2246. 6 1 22 52. 0 1 2254. 6 1 2257. 3 1 10-0923

!REMARKS: * INTERVAL = 1 MINUTE ** INTER

2207. E 2213. 1

Gouge No. 6224

First osed In Preset

0 00 0 + 1 11°Cl AtIl

0000s I 8900' I 9CTO' VOZO'

.0272 um' I 8000- I 9t170'

3I90. 0890' 81/10' 9180. 1/880. 3960' OZOI•

0

0

0

0 • C

O

•D

0

0 • 1/40

C

r) •••1 0

• LEDIQL1 I zczo-

0 C

O

•cf- C)

c

0 0

b

r•-• ctr 0 •

e

c

LC)

0 •

ta

I-1 1/40 0

•

0

c0 1/40 0 • C

O

et

TN

0 • b

y

1-1 C

O

0 • y

l- 00 C

O

0 • 1 Z960' I

I ozor I

Away 0191

'FEST 1L-L12 161L3 WOTE ftliSE 19178E .10.3117

`••• •

_n 1/40 • LO

IN C

r) • •:1- NJ co N

. • '1/4/0 in

en Ltau_

CO

LE

I

N. N

. m

cc

1 Interval

First Flow Pei

a000•

moos I *EC00.1 OCI0.1 8330'1 53E0'1

0390'1

0

0

0

cm • m

m

0

0 • o

co 1-1 0 r•••

CM

C

‘I 0

.....

in

NJ

en 0 re

) 0

CV C1/41 c in

0 o

[1_1

of

Z11 el rl

LLI

1E1

:

[Li

of

zt 1111 rI

1511

ormrs ro ,M pLRT-PRINrea IM u. .

1

TICKET NO. 745920


Extension Joint

III III III III

AP Running Cast

Hydraulic Jar

11 IIO

LITTLVII MC Sp EQUIPMENT DATA rORM 117..1-PRINTED IN Y.S.A

FH

!!!

r

Drill Pipe or Tubing

Reversing Sub

IP!' ill

Water Cushion Valve

Drill Pipe

Drill Collars

*Malemdlisealb4rereke-istesierreslif- DOUBLE Dual CIP Valve

Dual CIP Sampler

Hydro-Spring Tester

III

ail

Packer Assembly

Distributor 111 It

Ill It

Packer Assembly

Distributor

Packer Assembly

; let P


Side Wall Anchor

1111 Drill Collars

Flush Joint Anchor

ti Blanked-Off B.T. Running Case

Total Depth

■

Packer Assembly

ICI

Flush Joint Anchor



Drill Collars


ItI

ill

O. D. I.D. LENGTH DEPTH

F 7F" 7 95" 1.00' 90' Up

4.50" 3.826" 4590'? 6.25" 2.25" 447'? 6.25" 2.25" 1.00' - PIN 4" Reg.x 31/2

5 . 00 " .75" 7.00' 4995' 5.00" .75" 5.00' 5006'

5.00" 3.06" 4.00' 5007'

5.00" 1.75" 5.00'

5.00" 1.00" 2.75'

7.00" 1.53" 6.00' 5022'

5.00" 1.68" 2.00'

7.00" 1.53" 6.00' 5030'

5.00" ? 17" 4P'

5.00" 2.44" 4.00' 5078'

50821

VR Safety Joint

Pressure Equalizing Crossover

M. Manangenan. moMmIMMOMO=relanarManti

OMMOMMOOMIMMO MMMMMMMMMMM

.....IPn• MIIMMOMOMMI 'nes =3 ........e. awir

US 11.= El nesenaMEM era : "MO

EM:=1:: MOMILMIS MOMSMS=OMOMO

MMOMAMMMEMMEntIONMel= sansumamem. ...samnansa=

,....4.0

tardiPtarl

BM • OlOOMMINOMM MOM• •

0 Ell IMOMMILISMOMOMMEM MOMMOMMOMMOMMO MMO a.T

en ;MO MONO

i 6 Er 4

4 AMOS

...

11 :: a= MOOS

: : : : : : =a. a r • •......r.. - 4- as 00000 MU --,- T , Ultra" . ' :2 t :NI m"1: "a M. ""

.... :VIM"' ****** ar . . mmiv. Iradln:

: Mir 11 I E ....•..:6_ :: :::—..... nuir Id ....bwierr

...iimortutt ..•....

n firrM: * nits mi • n....urte..........7:

ir 1;

nasam anersammaserans

pe dprrah nis an. L.p.m. wan: :mil. n.....=... . itil gramensallierareariew.9 flu.: ...rt5 u m. ... :mi. : mt. tiniMHZ

:. 5•::

m::::::01:::- ma

t.li..-na-a sananross-e asmensantowa ma. inimMilkisiMMITIrstate: ...stribatteil, pat: ":::: ...nis== r .....m..:

:Hi lairailibrobsEW4toa vanium nu. ..sop= ... „mmma rai. ..imlus as. ..=,===mt,

itigasi'lliliqui Iat,r.i.;LrFagirfeira::;::..,:r::!ihn:...e":.. ..a

Na

Ca

Mg

Fe

50 Na

HCO3 5 Ca

SO. 5 Mg

CO3 5 Fe

CI

HCO,

SO4

C O3

CL1-12A (REV. 1904)

CHEMICAL & GEOLOGICAL LABORATORIES P. O. Box 2794

Casper, Wyoming

WATER ANALYSIS REPORT Chevron OPERATOR__ U.S.A., Inc.

WELL NO No. 1 Zubrod

FIELD Wildcat COUNTY Corson STATE South Dadota

DATE 2-5-80 LAB NO.

LOCATION Sec. SWNE 18-22N-21E FORMATION MO' (An/ egAvyeN INTERVAL Sella "an- SAMPLE FROM DST No .1 (Top of Water)

REMARKS & CONCLUSIONS•

Cations mg/I meq/1

Sodium ?791 121 4? Potassium 96 ?.46 Lithium - -

Calcium 540 26.95 Magnesium 200 16.44 Iron - -

Total Cations . . . 167.27

Total dissolved solids, mg/1 9988 NaC1 equivalent, mg/1 8577 Observed pH 6.3

Anions mg/1 meq/1

Sulfate 2300 47 84 Chloride 3100 87.4? Carbonate - -

Bicarbonate 1952 32.01 Hydroxide

Hydrogen sulfide present

167.27

Specific resistance @ 68°F.:

Observed - - -

Calculated - - -

Total Anions -

0.75 0.76

ohm-meters

ohm-meters

Sample above described

WATER ANALYSIS PATTERN

Scale MEQ per Unit

(Na value it above graphs includes N.. K, and L NOTE: Mg/I= Milligrams per liter Meq/1= Milligram equival nu per liter

Sodium chloride equivekny.--- by Dunlap & Hawthorne calculation from components

OPERATOR Chevron II S A , inc

WELL NO No 1 7uhrnd FIELD

COUNTY

STATF

Wildcat Corson South Dadota

El MS

are Er WWWWW SISSIMMIMMO

• OMMESSIMB MISSOMISSA

awn

M•SO•••SIO :aeY.

"M

•

:tha

"-"- t -4' it 4 "

is: "4= 4 SW aSSM:SM:

sow OBEYS

Blire.es. aid SYMMS --,------• iffit- : H -i-,,-

4-4 SUMS

Mann= WOW ISMOSSMI

agsVallat nor xxxxoloo •

r..„..L,t ff,-,-..r--` urn ...1 •• a t t ...„ .,#T. ..._;

,_. • :::::11 1- — 4:13 LIS•""

6«.,81WE

nu. minnuisom:=....rir notos essa i»

•w• a. ,r+ •

. utihni inur.... -.L.74:12r,i1 gm.. amihrannummir... rain Imgazina„si

:mum -Th.,Wzra.n.g.i: muinli: • ka_.......3......ran a.:: ::: um w.8,..a.n eat

klip:11•••Tinee4JIML ••..Sassaa.:=1211•400___ orMillp Ealra...en: ....ipntmen: rk muswisirtan s: =800"13.. ill1:-. 38%thre4...-

: wri.a.us....=...4...:.........3.: EilliabilL...ram...a=":":ihi ln u:

Mg wammr,.....sa....E.. . =awn; :FHB fro%111M: ... 2-Iiitm__ trerla4224t1 r a

Mg" "'lir eapadreavaiiiissu nomodurtaie illUFMESEWE HERritgiaj .

Na

Ca

Mg

Fe

CI

50

H CO3 5

SO4 5

CO3 5

Cl

HCO 3

SO4

C O3

CL1.12A (REV. 1964)

CHEMICAL & GEOLOGICAL LABORATORIES P. 0. Box 2794

Casper, Wyoming

WATER ANALYSIS REPORT

DATE 2-R-Rrl LAB NO 11211-2 LOCATION Sec SWIIF 1R-22N-21F FORMATION Alf fir4 S lit in tea n ye ni

INTERVAL 5-030-.,Oftt- SAMPLE FROM DST 110. 1 (Top of Fluid.

REMARKS & CONCLUSIONS -

Cations mg/1 meq/I Anions mg/1 meq1 1

Sodium 2914 177 62 Sulfate 1840 79 87

Potassium 99 1.41 2900 70 50 Chloride

Lithium Carbonate

Calcium 432 21.56 334 5.48 Bicarbonate

Magnesium 64 5.26 • Hydroxide

Iron Hydrogen sulfide

Total Cations . . 155.85 Total Anions - - - 155.85

Total dissolved solids, mg/1 9990 Specific resistance © 68°F.:

NaCI equivalent, mg/1 8038 Observed 0.79 ohm-meters 7.0 0.82 ohm-meters Observed pH Calculated


Scale Sample above descnbed

MEQ per Unit

(Ha value in above graphs include, Na. K. and LO

NOTE: Mg/I= Milligrams per liter Mel/l= Milligrem equivalenia per liter

Sodium chloride equivalent= by Dunlap & Havnhorne calculation from comporamts

Cations mg/1 meq/1 Anions mg/1

Sodium q51 41.36 Sulfate 1160 Potassium 44 1.13 Chloride 1070 Lithium Carbonate

Calcium 244 12.18 Bicarbonate 273 Magnesium 50 4.11 Hydroxide

Iron Hydrogen sulfide

Total Cations - - - - 58.78 Total Anions - - - -

Total dissolved solids, mg/1 3654 Specific resistance (17,0 611°F.:

NaC1 equivalent, mg/1 3051 Observed - - - - 1.80 Observed pH 7.3 Calculated - - - 2.05

meq/I

24.13 30.17

4.48

58.78

ohm-n3eters

ohm-meters

CL1-12A (REV. 1964)


Casper, Wyoming


OPERATOR Chevron U.S A • inr WELL NO No. 1 7uhrod

STATF South Dakota

DATE 2-5-An LAB NO 11211-1 LOCATION SP(' SWNF 1R-22N-21F FORMATION "inn/ C4frY0-4/ INTERVAL Sp ge)-- .6190/..4 SAMPLE FROM DST No. 1 (Sampler)

FIELD Wildcat COUNTY COrC011




Scale MEQ per Unit

::::nnelm... -“ ,

n.1=1 OOOOO wassree—ttee :::010,11eacts= • ........ 4, , .- - , , ..- -v. . l

• bp;

es Lams

.....

le .t: •

PAPPPWSA :Ha

-. -.1 -4-. 4-.-, -. , • :idd ever mon% OOOOOO tn. ram r OOOO pin

usoss.miakWess.rts s"--.... -... danharalESEE Cost waraCIMI

IIMPF.St. mestSirstkn.' naeneaa rna wawa man

nes wee ....a.= • anna= ... cosa eltEigli a

:: „ -

3:: –"name- ti

::::::::::IEBEr

.dirthe:

...

. ....„

,...,

,

1:..::.::::: • —sus:. ea

Eft: r

ha

will

WI mil : ....• a 9

iliqmpiiittithragliffidia11111 ad 1 . libingliffilhhililiffljAn ... . ifilini mg ____ • • .. -. ._...... r.

:::wssre-mrspisisrentspaprishos luainiulissslisidestrearfteti

..s.lainsainaneRseatearakallurjsraiatiges ji.n,.. ..

:::::::::shr. udition. hinealtren"214 higlikliEihnhisiaGs YIVIN mut .. 0- ..... 00•111111101••••••••••••••••••• UN ......... elonntlitnnaWillraratirai Arneamenelaa: raegar6a... .12:

smussuelipusa mt: • --sms usistsr.merwaratirmasssenassr: :::.:;::: .. :: .::: stronsus—...tenu mimir e

ss.rets' LyagszsrataLT.Seriff ...r. If • or IIIIII■alIIIM

: ennedai :hill randlinUlnin nal

Na

Ca

Mg

Fe

Cl

10

HCO3

S O4

CO3

C l

HCO 3

SO 4

CO3

0,4 value In above graphs includes Ns. K. and LH

NOTE: Mg/I= Milligrams per liter lie &IP= Milligram equival nee Pee liter Sodium ehlorlite equivelent=by Dunlap & Hawthorne celculation from components

:meet ........ wenn ereaniM: ken 2 WM Hp I

...... . nom . ......h.•—• •..... nill::: lag•Slierll:illen• 1111;061::=8:11:::::::::1=:

MA raingr••••• =•••••r•:

• ••••••••••::::=4 12••••111114111:1746•11•1•• ........ 111•••••••••••• • n iur........:1

.ILIZeses. ..... ....::::: '6: Z •I'•••••Snnarnip:wa ...ma:.

Sae

IMOSOMI ... • =In

....

. inh.tionup gum= munnui

:11:=J;d1h.r 4

r

iinhellann ram ••••••••••• ..... ONO

100 Na

HCO3 10 Ca

SO4 10 Mg

CO3 10 Fe

Na

Ca

Mg

Fe

:no -"a.... •

••=1:1=1 Man Min •=•• • MEM

:NN •••••• ••• MSS

1229411=tar 1::: aaaaaa srsZessasou rl 1=ass

sans= sra= aaaaa

taa • se mungasku.

Mallnlartr

Sten

Cl

HCO 3

S O 4

CO3

CLI-12A (REV. 1064)


Casper, Wyoming


DATE 2-5-80 LAB NO 31711-4

LOCATION Sesc. swy 18-22N-71F FORMATION RED tf/Yi INTERVAL .(41/40—'6',476 SAMPLE FROM DST No. 2 (Top of Fluid)

OPERATOR Chevron ll.C.A Inc WELL NO No. 1 Zubrod FIELD Wildcat COUNTY Corson • STATE

South Dakota


Cations mg/1 meq/I Sodium 7880 347.76 Potassium 296 7.58 Lithium Calcium 1210 60.38 Magnesium 340 27.95 Iron

Total Cations . 438.67

Total dissolved solids, mg/1 76062 NaC1 equivalent, mg/1 24778 Observed pH 6.8

meq/1

3040 63_73 13200 377.24

195 3.20

- - . - 438.67

Specific resistance Q 68°F.: Observed 0 200 ohm-meters Calculated 0.275 ohm-meters

Anions

Sulfate Chloride Carbonate Bicarbonate Hydroxide Hydrogen sulfide

Total Anions



Scale MEQ per Unit

(Na value in above graphs include. Na. X. and I.) NOTE: Ma/1 --7Millig ama per liter Men/l= Milligram equiv.l me per liter

Sodium chloride equivalent=by Dunlap 6 Hawthorne calculation from components

CHEMICAL & GEOLOGICAL LABORATORIES P. 0. Box 2794

Casper, Wyoming

"Qes2

0) FEB 1980 iS

cc) RECEIVED ti t-- r\1

CC) WESTERN ;iv )sFIELD a e OFFICE

Irma

CL1.12A (REV. 1964)

u. ma.:

dresffintitreartlEMESUE3 :ili blessisseesssess.

:Min s ....w....4111 ems ••• II •

::::: •••••• 000111•111•011•••11111 111 1MOMOSIMMIM In iire••••••••

:4

Mlle nanallPimimi•Meellitill es CO Ma: 11.1:"ra mnrirliii 1 pLiiiorgrollie. Lao :11111 :1fraprOkslih: : netihaira : ...1.... 1......- mass no sulem. :::13:111 : wapaum .....".•::::........••=: ::::1 um dm straw nu :::: i :er• .. • In. . oll .. r k

i ElitiHrt s

re LS 1111147PWttlellai en en

OM •

I•eliglill:21."enrei.nrag:::1=ararl EP Sid: ehigibtraeldreellnLegnEREPTa

C Lostsano. prottrassoneneneurinimmen• ::::::: =ss.::::nannaearin: ra r-nj u WM ........thmeawr ....

raw rti4:. aelCM.manas"

••=4:1=1Eirr. 4 --4" a raharam."".... -1-' :. oat •4

MI-4 1- ' =LIU

nem a"

tans mars stak—r itagran .42_,--, Nail

r........•. • ..: it,......r...... , "-:- ._. •... as.

n_ , i:ea ea

8111.41 annonanun Ti neweressea

1:411. %,:- 4 Itri"t

, -r44 4.1- .4 'i ,

Waren =1= -#74—L MB irtIMICreMi.

Ltd la

Na

Ca

Mg

Fe

CI 100 Na

HCO3 10 Ca

SO4 10 Mg

CO3 10 Fe

CI

HCO 3

SO4

CO3


OPERATOR Chevron DATE 7-c--Rn LAB NO 3321 1-5 WELL NO No. 1 7uhrod LOCATION FIELD Wildcat FoRmATior7-4712

STATE South Dakota

SAMPLE FROM DST No. ? (Middle)

REMARKS & CONCLUSIONS-

Cations mg/I meg/1 Anions ,,,ti meg/1

Sodium 17341 754.34 Sulfate 2000 41.60 Potassium 774 19.81 Chloride 29200 823.44 Lithium - - Carbonate - - Calcium 800 39.92 Bicarbonate 200 3.28 Magnesium 660 54.25 Hydroxide Iron Hydrogen sulfide -

Total Cations - - - - 868.32 Total Anions - . 868.32

Total dissolved solids, trig/1 50874 Specific resistance @ 68°F.: NaC1 equivalent, nag/1 50449 Observed - 0.114 ohm-meters Observed pH 5.7 Calculated - - 0.130 ohm-meters


Scale Sample above described

MEQ per Unit

COUNTY Corson INTERVAL 64' GI s' toa

(Na value n above graphs includes Ma. IC. and L )

NOTE: Mg/I=Milligrams per liter Meq/l= Milligram equiv lents per liter

Sodium chloride equivalent=by Dunlap & Hawthorne calculation from conaponents

CHEVRON USA INCORPORATED

NUMBER 1 ZUBROD

CORSON COUNTY, SOUTH DAKOTA

CORE ANALYSIS RESULTS FOR

ELE VATION: 2271 KB

DESC RI PTI ON

i•••

.5- •••-

',- •)-

".- >

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CORE LABORATORIES, INC. Petroleum Reservoir Engineering

COMPANY

WELL

LOCATION

CHEVRON USA INC. FIELD WILDCAT FILE 9105-2592

zuBROD NO. 1 COUNTY CORSON DATE 1-9-80

SW NE SECA 18-T22N-R21E STATE SOUTH DAKOTA ELEV. 2271' KB

CORE-GAMMA CORRELATION .4. w•, .1.1,

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INTERPRETATION OF DATA

5044.0-5082.0 Feet - Water productive where permeable. 6500.0-6616.0 Feet - Water productive where permeable. 7234.0-7242.0 Feet - Non-productive due to low permeability. 7242.0-7265.0 Feet - Believed to be water productive.

These recovery estimates represent theoretical maximum values for solution gas and water drive. They assume that production is started at original reservoir pressure; i.e., no account is taken of production to date or of prior drainage to other areas. The effects of factors tending to reduce actual ultimate recovery, such as economic limits on oil production rates, gas-oil ratios, or water-oil ratios, have not been taken into account. Neither have factors been considered which may result in actual recovery intermediate between solution gas and complete water drive recoveries, such as gas cap expansion, gravity drainage, or partial water drive. Detailed predictions of ultimate oil recovery to specific abandonment conditions may be made in an engineering study in which considera-tion is given to overall reservoir characteristics and economic factors. These analyses, opinions or interpretations are based on observations and materials supplied by the client to whom, and for whose exclusive and confidential use, this report is made. The interpretations or opinions expressed represent the best judgment of Core Laboratories, Inc. (all errors and omissions excepted); but Core Laboratories, Inc., and its officers and employees assume no responsibility and make no warranty or representation as to the productivity, proper operation, or profitableness of any oil, gas or other mineral well or sand in connection with which such report is used or relied upon.

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CORE LABORATORIES, INC. Petroleum Reservoir Engineering

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WELL

#1 CHEVRON SONAT ZUBROD COUNTY CORSON

DATE 1-19-80

LOCATION SW NE SEC 18 T22N - R21E STATE SOUTH DAKOTA

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INTERPRETATION OF DATA

6520.0 - 6615.0 not - Water productive where permeable.

These recovery estimates represent theoretical maximum values for solution gas and water drive. They assume that prOduction is started at original reservoir pressure: i.e., no account is taken of production to date or of prior drainage to other areas. The effects of factors tending to reduce actual ultimate recovery, such as economic limits on oil production rates, gas-oil ratios, or water-oil ratios, have not been taken into account. Neither have factors been considered which may result in actual recovery intermediate between solution gas and complete water drive recoveries. such as gas cap expansion, gravity drainage. or partial water drive. Detailed predictions of ultimate oil recovery to specific abandonment conditions may be made in an engineering study in which considera-tion is given to overall reservoir characteristics and economic factors.

These analyse., opinions or Interpretations are hatted on observations and material. supplied by the client to whom, and for whose exclusive and confidential use, this report is made. The interpretations or opinions expressed represent the best judgment of Core Laboratories, Inc. tall errors and omissions excepted) but Core Laboratories, Inc., and its officers and employees assume no responsibility and make no warranty or representation as to the productivity, proper operation, or profltabkness of any oil, gas or other mineral welt or sand in connection with which such report is used or relied upon.

6573

/ //

6584

6585

6599

7 / /-

ADMINISTRATIVE / SUNDRY REPORTS

Dry?

X

Water (tIs./day)

Application to drill this well was filed in name of

Chevron U.S.A. Inc. Date plugged:

1-25-80

Character of well at completion (initial production): Oil (bbls/day) 1 Gas (MCF/day)

Amount well producing when plugged: Oil (bbl6day) Gas trICF/day)

Has this well ever produced oil or gas

No Total depth

7770

TTTTT PSI. CO.. P11111111

S. Oak. 011 & Gas Board FORM 7

PLUGGING RECORD 9

Operator

Address

Chevron U.S.A. Inc. P. O. Box 599, Denver, CO 80201 Name of Lease

Well No. Field & Reservoir

Chevron -SONAT-Zubrod

1

Wildcat Location of Well

Sec-Twp-Rge or Block 8s.Survey County

1984.3' FNL & 1832.5' FEL SWNE Sec. 18, T22N, R21E

Corson

Name of each formation containing oil or gas. Indicate which formation open to well-bore at time of plugging

Fluid content of each formation Depth interval of each formation Size, kind & depth of plugs used indicate zones squeeze cemented, giving amount cement. Plugs

None 100 sxs 6400-6700

Mission Canyon-Wtr 5030-5082 DST #1 100 sxs 4900-5200 Red River-Wtr 6490-6616 DST #2 40 sxs 550- 650

10 sxs Top Surf C

CASING RECORD Size pipe

9-5/8"

Put in well (ft)

609

Pulled out (ft.)

0

Left in well (ft.)

609

Give depth and method of part- ing casing (shot,

ripped etc)

Packers and shoes

Was well filled with mud-laden fluid, according to regulations? Yes

Indicate deepest formation containing fresh water.

Mission Canyon 5082' 1070 mg/2 C2 In addition to other information required on this form, if this well was plugged back for use as a fresh water well, give all pertinent details of plugging operations to base of fresh water sand, perforated interval to fresh water sand, name and address of surface owner, and attach letter from surface owner authorizing completion of this well as a water well and agreeing to assume full liability for any subsequent plug-ging which might be required.

4 11!B1920c1,40, 4,?

tA <-2 FEB 1980 v,

L\ 1- Ii C Z IV EL ;:":„4

WESTERN -CP FIELD co

(S) OFFICE GStiEZ°P

USE REVERSE SIDE FOR ADDITIONAL DETAIL

Executed this the 12thday of February _, 19_80 State of Lalarada

County of

Before me, the undersigned authority, on this day personally appeared J. J. Johnson known to me to be the person where name is subscribed to the above instrument, who being by me duly sworn on oath states, that he is duly authorized to make the above report and that he has knowledge of the facts stated therein, and that said report is true and correct.

Subscribed and sworn to before me this 12th day of February 80 SEAL

My commission expires _ I, _JAM Notary Public in and for Galaradp County,

Approved

DO NOT WRIT W THIS LINE

OIL AN A BOAR 0 THE STATE OF SOUTH DAKOTA

, Secretary

Date

s g

CORRESPONDENCE

01517/9 , .ses\ 4

cz, DEC 1920

r WESTERN , , FIELO

OFFICE e- ,\ t"7

Mr. Fred V. Steece, Supervisor

Western Field Office

308 West Blvd.

Rapid City, SD 57701

Dear Mr. Steece:

This letter informs you that the surface restoration

at the site of the following oil or gas test well

has been completed to my satisfaction:

Permit Well Name and Location

960 Chevron #1 Sonat-Zubrod, SWNE 18-22N-21E, Corson

I am the surface owner of record.

SIGNED AizAALAA

DATE C, ge0

MISCELLANEOUS

NO MISCELLANEOUS INFORMATION FOR THIS WELL

AS OF 5/12/2011

county: corson legal location: api nosddenr.net/ogfiles/corson/4003120022.pdfirs, snr vitro, lat...

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