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AUG I 2 1985

M

PLACID OIL COMPANY

EXPLORATORY DRILLING PLAN

HIGH ISLAND AREA BLOCK 162 OCS-G-6198

OFFSHORE TEXAS

DALLAS, TEXAS

PLA' ;D OIL COMPANY :W*N» THA\kx;iviN<, TIIWER

DALLAS, TEXAS 76201

J u l y 29, 1985

M i n e r a l s Management S e r v i c e U . S. Department o f t h e I n t e r i o r P .O . Box 7944 M e t a i r i e , LA 70010 MWWAIS • m u m srotca

A t t e n t i o n : Mr. Donald W. Solanas JUL 26 1985 RE: Exploratory D r i l l i n q Plan

OCS-G-6198 "•tan *•« t Block A 16 2, High Island Area Offshore, Texas

Dear Mr. Solanas:

I n conformity with Federal regulations e f f e c t i v e December 13, 1979, referred t o as the Oil and Gas Operating Regulations f o r the Outer Continental Shelf 30 CFR 250.34, we submit a Plan of Exploration for OCS-G-6198, Block A-162, High I s l a n d Area, Offshore, Texas.

Enclosed are eight (8) copies as required by your d i r e c t i v e t o operators dated October 22, 1981. Please note that f i v e (5) copies have red covers and are marked CONFIDENTIAL. These confidential copies contain information which we consider exempt from disclosure under the Freedom of Information Act (5 U.S.C. 552) and implementing regulations (43 CFR Part 2).

The d r i l l i n g r i g t o be used i n t h i s Plan i s under c o n t r a c t . We a n t i c i p a t e the r i g w i l l be read>, t o commence the f i r s t w e l l on September 7, 1985.

I f you have any q u e s t i o n s i n regard t o our Plan of E x p l o r a t i o n , p l e a s e contac t me c o l l e c t at (214) 573-6233. Your e a r l i e s t a p p r o v a l of t h i s e x p l o r a t o r y p lan w i l l be a p p r e c i a t e d .

Your s very t r u l y ,

PLACID OIL COMPANY

James E. Jordan Adm. A s s ' t .

JEJ /eas e n c .

PLACID OIL COMPANY

EXPLORATORY DRILLING PLAN

OCS-G-6198

BLOCK A-162

HIGH ISLAND AREA

OFFSHORE, TEXAS

COMTKMT8

General I n f o r m a t i o n

E x h i b i t I

E x h i b i t I I

E x h i b i t I I I

E x h i b i t IV

E x h i b i t V

E x h i b i t V I

E x h i b i t V I I

E x h i b i t V I I I

E x h i b i t IX

• E x h i b i t X

• E x h i b i t XI

• C o n f i d e n t i a l I n f o r m a t i o n

E x p l o r a t o r y D r i l l i n g Schedule

L o c a t i o n and V i c i n i t y Maps

D r i l l i n g Prognosis

Rig 82 S p e c i f i c a t i o n s

D r i l l i n g Mud Components

D i v e r t e r Hookup

Contingency Plan

Shallow Hazard and C u l t u r a l Resources Report

I n f o r m a t i o n on Gaseous Emissions

Seismic Map

Ge o l o g i c a l Prognosis

GENERAL INFORMATION

Placid O i l Company proposes t o commence d r i l l i n g o p e r a t i o n s

on Block A-162, High I s l a n d Area, i n the o f f s h o r e waters

of Texas.

The block, c o n s i s t i n g of 5,760 acres, was acq u i r e d a t the

August 2f , 1983, OCS Sale. Lease OCS-G-6198 was issued

e f f e c t i v e October 1, 1983. P l a c i d O i l Company acquired

the lease as a farm-in d u r i n g May, 1985, from P h i l l i p s

Petroleum Company ( f o r m e r l y A m i n o i l I n c o r p o r a t e d ) . T^e

present ownership i s 100.00% P l a c i d O i l Company.

The purpose of t h i s e x p l o r a t o r y plan i s t o ev a l u a t e the

p o t e n t i a l of lease OCS-G-6198 t o produce commercial amounts

of hydrocarbons. A d d i t i o n a l l y , the e x p l o r a t o r y d r i l l i n g

w i l l p r o v i d e t he necessary g e o l o g i c a l and e n g i n e e r i n g data

to plan f u r t h e r development and pr o d u c t i o n o p e r a t i o n s i f

commercial hydrocarbons are pr e s e n t .

As shown i n E x h i b i t s I and I I , we propose t o commence d r i l l ­

ing o p e r a t i o n s September 7, 1985, and continue through

March 10, 1986. The t e n t a t i v e l o c a t i o n s f o r the w e l l s

are as f o i l o w s :

OCS-G-6198 Lo c a t i o n "A" SURFACE 4500' FSL & 3000' FEL

OCS-G-6198 Lo c a t i o n "B" SURFACE 2500* FSL & 2000' FEL

OCS-G-6198 Location "C" SURFACE 7050' FSL 4 4200* FEL

OCS-G-6198 Location "D" SURFACE 5850' FNL fc 5800' FEL

OCS-G-6198 Location "E" SURFACE 5000' FNL fc 2900' FWL

A l l five wells are planned to be d r i l l e d as s t r a i g h t holes

and to be d r i l l e d to a.- approximate t o t a l dapth of

10,000' TVD.

As each w e l l i s d r i l l e d and new information i s acquired

on the geology of the block, the sequence and number of

subsequent w e l l s may change. After logging and t e s t i n g ,

the exploratory wells w i l l be temporarily plugged and

abandoned, i f found to be commercially productive. Except

for v e locity surveys, no fu r t h e r geological surveys are

anticipated. Exhibit I I I l i s t s i n b r i e f a d r i l l i n g prognosis

to be used on each well, allowing for minor changes as

new conditions are found.

An offshore mobile d r i l l i n g platform, Penrud 82, w i l l perform

the d r i l l i n g under t h i s p l a r . Exhibit IV l i s t s the

specifications of t h i s d r i l l i n g u n i t . The r i g w i l l be

equipped with t y p i c a l p o l l u t i o n control equipment. Exhibit

V l i a t s the t y p i c a l mud additives and th e i r trade names

as well as the volumes expectec to be used i n conformity

with OCS Order No. 2. Included as Exhibit VI i s the d i v e r t e r

hookup to be used on Penrod 82.

r

Exhibit V I I i s a brief description of our o i l - s p i l l

contingency plan. I t includes equipment, equipment location

and travel time to High Island Block A-162.

In December, 1983, Oceanonics Incorporated, conducted a

shallow d r i l l i n g hazard survey of the d r i l l i n g area. This

consisted of a multisensor survey using an echo sounder,

sub-bottom p r o f i l e r , water gun, side scan sonar, and

magnetometer devices. This report i s included as Exhibit

V I I I of t h i s plan.

Exhibit IX contains information as required by the Air

Quality Regulations 30 CFR .'50.7, e f f e c t i v e June 2, 1980.

This report war- prepared by John E. Chance and Associates,

Incorporated.

Based on Placid Oil Company's i n t e r p r e t a t i o n of CDP seismic

data, one seismic horizon (Exhibit X) is included to show

the subsurface geology of High Island Block A-162. Also

includ* i s a geological prognosis of geological markers

basea on nearby well control (Exhibit XI).

I t is hereby noted that Exhibits X and XI are considered

proprietary and as such are exempt from disclosure under

the Freedom of Information Act (5 U.S.C. 552 ) and

implementing requlations (43 CFR Part 2).

EXPLORATORY DRILLING SCHEDULE HIGH ISLAND

O C S - G - 6 1 9 8 BLOCK A - I 6 2

1 9 8 5 1986

A S 0 M D J F M A

OCS-G-6198

A OCS-G-6198

a OCS-G-6198

c OCS-G-6198

D OCS-G-6198

E

EXHIBIT I

0 o o

— 2 9 0 0 -

PLACID ET AL O C S - G - 6198

8 OD IT)

A - 14 5

A-162

5 8 0 0

4 2 0 0 ' -

3 0 0 0 -

o Ifl O

o — 2 0 0 0 '

o o (NJ

F XHlBlT l I

A - 4 0 8 O

PLACID OIL COMPANY

HIGH ISLAND BLK A - 162

LOCATION MAP

SCALE l" • 2000'

r

ONSHOKL. SUPPORT B A S E F A C I L I T I E S

Base f a c i l i t i e s t o be used f o r t he d r i i ng o f w e l l s on

High I s l a n d B l o c k A-162 w i l l be l o c a t e d i n G a l v e s t o n , Texas.

This w i l l be an e s t a b l i s h e d f a c i l i t y t h a t w i l l r e q u i r e

no m o d i f i c a t i o n s .

DRILLING PROGNOSES OP HIGH ISLANP BLOCK A 162

OCS-G-6198

1. Drive 26" d r i v e pipe t o •300'.

2. Nipple up 30" preventer w i t h d i v e r t e r on 26" d r i v e p i p e .

3. D r i l l a 22" hole w i t h a 7 6 " s i n g l e blade s t a b i l i z e r t o 1,000' .

4. Have s u f f i c i e n t volume of weighted mud i r . the tanks t o f i l l t h e 26" hole.

5. Run 20" casing t o 1,000' TVD and cement w i t h s u f f i c i e n t q u a n t i t y t o b r i n g r e t u r n s t o the ocean f l o o r .

6. Nipple down 30" preventer and i n s t a l l 20" wellhead.

7. D r i l l 17 1/2" hole t o 4,000' TVD w i t h 9.0 - 9.5 ppg mud w e i g h t . Open hole t o 22". Run 16" casing t o 4,000' and cement w i t h s u f f i c i e n t q u a n t i t y t o b r i n g cement at l e a s t 197' i n t o 20" conductor p i p e .

8. I n s t a l l 16" wellhead and n i p p l e up t h r e e (3) ram-type* and one (1) annular BOP. Test 16" casing t o 1490 p s i .

•Ram-type BOP c o n s i s t s of one (1) b l i n d shear ram and two (2) pipe rams, 10,000 p s i working pressure.

9. D r i l l out casing shoe and pressure t e s t f o r m a t i o n t o 14.0 ppg EMW

10. D r i l l 14 1/2" hole t o 7,000' TVD w i t h 9.5 - 13.5 ppg mud weights and log the op?n h o l e .

11. Run 10-3/4" casing t o 7,000* and cement w i t h s u f f i c i e n t q u a n t i t y t o cover and i s o l a t e a l l hydrocarbon and abnormal pressure zones.

12. I n s t a l l 10-3/4" wellhead and n i p p l e up fou r (4) ram-type* and one (1) annular BOP.

*Rain-type BOP c o n s i s t s of one (1) b l i n d ram and three (3) p i p e rams, 10,000 p s i working pressure.

13. Test 10-3/4" casing t o 3000 p s i . D r i l l out casing shoe ano t e s t formation t o 16.4 ppg EMW.

14. D r i l l a 9-1/2" hole t o TD at 10,000' TVD w i t h 13.5 -16.0 ppg mud weight and log the open hol e .

EXHIBIT I I I

15. Run 8-5/8" l i n e r to 10,000' TVD. Cement with s u f f i c i e n t quantity to cover and isolate a l l hydrocarbon and abnormally pressured zones.

16. Test 8-5/8" l i n e r to 3000 p s i .

PENROD 82

OFFSHORE MOBILE DRILLING PLATFORM

INTRODUCTION

The Marathon LeTourncau Class I I6-C Cantilever ed Substructure .lack-Up is a triangular shaped hull w i th th ree legs and cylindrical pointed spud cans. The hull is raised and .'jwered by elect nca l l y driven rack and pinion gears. The plat form is classed by the American Bureau of Shipping as a SeJf-Elevating Dri l l ing Unit .

PRINCIPLE VESSEL DIMENSIONS:

Hull Length 2*3 feet Hull Breadth 200.5 feet Depth of Hull 26 feet Gear Rack Height 26 feet Overall Length of Spud Legs 410 feet A i t Spud Centers 1*2 feet Centerline of A f t Spuds to Centerline of Bow Spud 1*8 feet Design Water Depth (2 5' penetration)

Non-Hurricane Season 300 feet Hurricane Season 250 feet

Rated Dril l ing Depth 25,000 feet

LIQUID Jt DRY STORAGE CAPACITIES:

Dri l l Water 5,*60 bbls. Fuel Oil 8,572 bbls. Freshwater 1,330 bbls. Bulk Mud/Cement (2) 1360 f t . > (*) 10*0 f t . ' 6,880 cu. f t . Liquid Mud 1,300 bbls.

CRANES;

Three Marathon LeTourneau Series PCM-120AS, 50 tons at 25 feet, boom length 100 feet.

QUARTERS:

Air conditioned accommodations for 72 men; two galleys and mess halls, six bed hospital.

ANCHORING SYSTEM:

Windlasses - (*) Marathon LeTourneau Series W-l 500TS units wi th 2600' of 1 1/2" diameter wire rope.

Anchors - (*) 10,000 Ib. LWT type.

PENROD 82 DESCRIPTION, Page 1

•

HELIPORT:

Sikorsky S-6I capacity or equal.

EQUIPMENT AND DRILLING MACHINERY

DRAWWORKS:

National I 320-UE Drawworks with 20,WO leet capacity of 9/16 inch sandline, emergency rotary drive and a Baylor Model 6032 Eddy Current Brake. Drawworks driven by two (2) D-79 electric motors ra ted at 2000 hoisting HP.

POWER:

Three (3) EMD MD12E8 diesel engines. Each engine is rated at 1500 continuous HP and drives a 1050 KW 600 vol t AC generator.

Five (5) Baylor basic "Thyr ig I I I " units are used to supply DC power for dr i l l ing equipment.

MUD PUMPS:

Two (2) National Model I2P-160 Triplex Mud Pumps. Each independently driven by two (2) EMD-79 electric motors rated at 1600 HP and supercharged by a 50 HP electr ic driven 6" x 5" centrifugal pump.

DERRICK, SUBSTRUCTURE AND ACCESSORIES:

D.S.I. WF high x 30' wide derr ick with a static hook load capacity of 1,000,000 lbs. wi th 12 lines. One hundred (100) MPH wind load capacity wi th dri l l pipe.

National type 760-FA, 583 ton capacity Crown Block wi th seven (7) 60" diameter sheaves grooved for 1 3/8" w i re ime .

Adjustable casing stabbing p lat form.

Two (2) 1 5 ton hoists instal led below the substructure for handling the BOP equipment.

TRAVELING BLOCK:

National type 660-H-500 500 Ton Traveling Block wi th 6-60" diameter sheaves grooved for 1 3/8" wire line.

PENROD 82 DESCRIPTION, Page 2

HOOK:

National type H-500, capacity 500 ton.

SWIVEL:

National *ype P-650, capacity 650 ton.

ROTARY EQUIPMENT:

National type C-375 ro tary wi th 37 l / v table opening independently driven by an EMD D-79 electric motor through a National t^>-speed transmission. Varco MPCH master bushing.

Varco 27-HDP kelly bushing wi th wip*y assembly.

MUD MIXING:

Two (2) 6" x 5" cent r i fugal mud ng pumps. Each driven by a 100 HP AC electr ic motor. **

MUD SYSTEM:

Three (3) 400 bbl capaci ty liquid nud tanks plus one (1) 50 bbl. capacity slug tank. Al l active mud tanks equipped wi th Brandt Model MA-20 mud agitators. One Sweco Model P10C03 Desander unit w i t h three (31 12" cones. One (1) Sweco P10C16 Desilter unit. Desander and desilter pumps are 6 x 5 x 14 Mission centrifugals wi th 75 HP electric motors. One Brandt Dual Tandem screen shale shaker.

DRILL PIPE AND DRILL COLLARS:

269 jts of 4-1/2" OD 16.60#/f t . Grade E, Range 2 Dr i l l Pipe wi th 6 1/4" OD x 4-1/2" XH T J .

229 jts of 4 - 1 / r OD 2O.00#/ft. Grade G, Range 2 Dr i l l Pipe wi th 6 1/4" OD x 4-1/2" XH T J .

24 - 7" OD dr i l l col lars

18 - 8" OD dr i l l collars

1 - Dri lco Kel ly 5 1/4" HEX by 2 13/16" bore by 40'long wi th 4 1/2" I.F. pin.

Handling tools for d r i l l pipe and dril l collars.

PENROD 82 DESCRIPTION, Page 3

BLOWOUT PREVENTERS;

One Hydril 21 1/4" MSP 2000 psi W.P.; One Hydril 13 5/8" GL 5000 psi W.P. One Cameron 13 5/8" - 10,000 psi W.P., type "U" Single; One Cameron 13 5/8" - 10,000 psi W.P., type "U" double. One 10,000 psi W.P. choke manifold with adjustable chokes. Preventers and choke manifold treated for H2S.

Blowout preventer control unit is a Koomey Model ET 15160-3BTM, 2000 psi W.P. accumulator system.

COMMUNICATIONS EQUIPMENT;

I - RCA CRFM-9A-Q3A 350 watt Base Radio I - RCA CRFM-7A-F3A 100 watt Standby Radio 1 - ITT DECCA STR 25 Marine Radio I - GAI-Tronics Intercom System

SPECIAL EQUIPMENT;

1. Kelco 3-8 Power Slips for 4-1/2" drill pipe.

2. Bearcat Automatic Driller.

3. Mud-Gas Separator shop made.

4. Six (6) Pen Drilling Recorder.

5. Dual mud lines complete with dual standpipe and 3" x 60' - 10,000 psi test rotary hoses.

6. Halliburton HT-400 cement unit driven with recirculating mixer by two (2) EMD D-79 DC electric motors.

7. Byron-Jackson spinning wrench for 4-1/2" O.D. drill pipe.

8. Varco Model 6500 Power Sub.

9. Totco Pit Level A Flow Line Indicator.

10. Two (2) Maxim TCF - 7.5 water distillation units - 15,000 gallons per day total.

11. Two (?) 400 amp welding machines and oxygen-acetylene equipment.

12. Mathey Retriever wire line unit with 15,000 f t . of .092 wire line.

13. OMSCO 6 5/S" I 5,000 psi test upper kelly valve.

PENROD 82 DESCRIPTION, Page 4

I * . Two (2) T.I.W. 1 5,000 psi test lower k d l y valve.

1 5. T.I.W. 10,000 psi test dri l l pipe safety valve.

16. Gray in?ide BOP.

17. Drilco EZ to rque hydraulic cathead.

18. Toyota 02-FDC-20 diesel fork l i f t truck for sack mud storage room.

19. Totco straight hole instrument 0 - 8 degree.

20. Overshots and taper tap; for contractor furnished dri l l str ing.

21. Totco WLA-75 weight indicator, tong torque gauge, pump pressure gauge, Potary RPM indicator, and pump stroke indicators.

22. Air tuggers for use on rig floor.

23. One central air system with two (2) 490 CFM air compressors, and one electric air dryer.

2*. Diesel engine dr iven 250 KW emergency AC generator.

2 ) . Baylor F i l te ron sewage treatment plant.

26. Drilco Degasser.

PENROD 82 DESCRIPTION, Page 5

StO — • 073 — 1 0 4 0 — M i l —

7SO »70 1190

I I

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I I ISO — u » o

m o — n s o • t s 1000

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I t o t s 1243 — 1230

i t s * — n i o

I I

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I I 123 0 IOOO

I I I 1230 1230 1

I I I

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I 1230 .1230 — 1 2 3 0

I I tOtS 1230 1230 1330

I I I t i O 1230 1230 1230

I I 1230 1230 IOW

I I I t::o nso t'.oo

FIGURE IV-1

• 4S

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. 1 7 =

1

I I 1230 — . 1230 1250 1230 1230 1230

1230 — 1 2 3 0 — 1 2 3 0 I

.1230 .1230 1230

USO 31 g

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!• M t 1 ' " 1*11 faa •

DRILLING MUL COMPONENTS HIGH ISLAND BLOCK A-162

OCS-G-6198

lrcobar 6,000 sacks

Imcogel 1,250 sacks

NC-10 1,050 sacks

Imco Lig 816 sacks

Caustic Soda 675 sacks

Drispac 40 sacks

Soda Ash 70 sacks

Walnut Shells 150 sacks

EXHIBIT V

COMPARABLE MUD PRODUCTS BY TRADENAMES

IMCO * Description, SERVtCES Barold Magcobar Mile ham Primary Application

WEIGHTING AGENTS ANO VISCOSIFIERS IMCO BAR l l f O l g M.gcob*' Mil-B*f For i n c n i n r ^ mud weejht up IO 20

PPS

Catc.umCerton.t* IMCOWATf lo-Wete W O JC Per IrKfOOOMf • • • 8 " ' Of o.i mutt up

wo so to 10 J ppg

BontoMie IMCOGEL Aqu*go< Megcogal MMgef V.tcc* ity and f. It r.t, on control .n WOltK-OOMTtwaO

Sub-e«o.on.tt IMCOKLAY •oroco High Yield Green Band . . . For uoo when larger particle t a t • B»nfl»flCi»» Cloy detired for *.*cotity ond Miration

Arupuig.t* IMCf I N E O E L . . . Z i o o K SanG*i S . i t w i t t f G ( l v.tcoa.f.er .n tan-. iter m Ud»

Benef.atted IMCO MVS Ou.cn-G«i Kwih-Th* Super-Col . flu IT i m f t i r [ ~ Oil U j | I ' Bentonite . ho'* mudt with minimum Chem>cal

treatment

Atbet ioa' .beni IMCOSMUBLIFT F total ' o n Flota! Vieeoeifier for freeh- or Mtt-water mudt.

BectenaHy Produced IMCOXC X C Polymer DuOvit XCPOfymer v.tc:on«'tr and »lu«3 loti control *dd.-Poh/mer Imc for low-tolidt mudt

DISPERSANTS Sodium IMCO PHOS Borofot Magco-Phoa J.i Pot Thinner for low pH freah-wtter mudt.

Tetraphoephtte

Sodium Acid SAPP SAP** SAPP SAPP Por trotting cement contamination Pyrophosphate

Oueoracho IMC00BT Tannea M-COuebrtcho Ttnco Thinner for froth-water tnd lime mudt. Compound

Modified Tennm . DESCO Ootco D*tco Oetco Thinner for freth- tnd ttlt-wtter mudt alhal.'ed for pH control

MmedLignito IMCOLIO Cerbono* TtnnATh.n Ligco D.tpertant, a-" t,fic,r tnd tuppiemerv ttry tdd.t.va fot'' uio iota control.

Caut t icned I ignite IMC0THIN C C - l * C e u t l i l i g . . . Ltgcon 1-d ratio cauttic-lignite C p e - t a n t emuitif .er tnd tupp lemen tary fluid loaa addithro.

Modified I M C O vC-tO O-Broam . Speraene Uhi-CaJ O'tperaent and fluid loaa control »dd-Lignotuifonate t-ve for water-bete mode.

BlendedLignotul- .. IMCORD-111 Blended mu Mi-purpoee ditperatnt (ona te Compound fluid loaa agent tnd inhibitor tor IMCO

RD-111 mud tyeatma

FLUID LOSS REDUCERS Organic Polymer lMCOPEPMALOlO . DCXTP.IO Co-moit fluid loaa m - t ier -cat* ty*

tema

P'egeit i inuad iMCOlOiO Impermei My-Lo-Jel Mitaiarch Control* fluid loot m ttturttad u t Starch watar. lime and S C P mudt

0 asc r ip t i on IMCO SERVICES Barold Mag cob ar MHcham Primary Application

Sndt* Garbnay-metny i Ceiluiuae

IMCO CM' ( P . * g U l * r ,

C » ' i « . . . . ( H e g u l - )

MtOjCoCMC fW|iiliH

MHchemCMC (Mao-Vis)

' * f l u i d toS» r o n ' ^ l r n d C„rt»» pen*»n in watar -beae mud*.

Sodium Carooay-methyt Cel lulose

IMCO C M C <Hr-V*»)

Po ry a n i o n i c C*Mt r tO*K OP lSPAC Pory m # f

Cel lo* ( H i - V i * >

D r a j M

Magco (H i -V ta )

Dnepec

MMchem CMC (M.-V.B)

Dnaoec

For fluid loaa control and veeoa.ty building m low-

Fluid loaa control additive and . .eeo i -f ^ f m a a l t m u d *

PptyanK>r>< ^at luk juc OPlSPAC SUPEF.LO

Onspac Supar lo

Orrapac Superio

Drispac Supario

Pnmary fhjtd loaa edd'trve aacondary »iacoaifiar m water-oaee mude.

Sod ium Polyacry late

Sod ium Potyacryiete

CVPAFI Cypan .

Wl-tOO WL-100

Cypan Cypen

WL-100 w v ioo

Fluid loaa control In calcium-free aolida and non-d i»p*ra*d muda

Fluid loaa control m celou.n-free aolida and non-diaperaed muda

Eatreme Pressure Lubr icant

LUBRICANTS, DETERGENTS, EMULSIFIERS

I M C O E P CP Mud Lube Bit Lube LUBE

U*trft*ftBR Uaad m water-base muda to impart eatreme preaaura luOncrty

Proceaaed H y d r o c a r b o n a

SOL TEX Son* . Uaad in water-baaa mude to tower downhole fluid loaa and mammiie heewihg aheie

Water Capera ib ie A a p h a i u

•MCO M0LEC0AT

STABIL-HOLE

ITI-WD Lubricant and fluid loaa reducer for water-base muda that contain nodieaei or crude B t

Oi l Diepersibie A s p h a l t *

IMCO MUO OIL

8 a r o d Pive-A-Hoae A a p h a i t

Cerbo-S al. Lubricant and fluid loaa reducer tor water-baa* fluida that contam d*eaei or crude oe.

O.t So lub le Sur tactant*

IMCO FPEEPtPE

Shot-Free P.peLaa Petrocote Non-weighted fluid for apotting lo free differentially stuck papa.

IMCOMO Con Det D-O Mile hem MO . Uaad an water-baee muds to aid <n dropping sand Emuiaifiea OH. reducee torque and mimmuee bit-balling.

Non- ion ic E m u ' n ' e OME Ahtaho-E SurFaa-E

Blend Of Anionic IMCO SWS Trimulao Salmaa Surtectants

OME Emuiaifiar tor aurfacunt muda

Atlosol A AtioaoiS

Emuiaifiar tor salt- and Ireah-waier muds

A n O r g a n i c E n t i t y Neutra l ized witn A m i n f s

IMCO Tor t jT r im OOS-3 LUBRIKLEEN

Mii-PtaieJ Suppliee the lubriceting propertiea of oils without environmenul pollution.

Blend o l Fatty Ac id* Su' fonetee. A A sphait ic Maieriala

IMCOSPOT SF too Invert emu la ion that may ba lo desired density for sport mg 40 f differentially stuck pane

A l u m i n u m Stee.-at*

OEFOAMERS. FLOCCULANTS. BACTERICIDES

Aluminum Stearate

A luminum Steerate

Aluminum Stearate

Aluminum Defoamer for ligooautfonata Stearate

Sod ium A lky lAry l Su l fonate

•MCODEFOAM Magconoi Defoamer

Defoamer lor sail tatuistad muds

2

IMCP Qascrlpthn SEHVICES Barord Maqcobar Mllcham Primary Application

S u r l a c * Active OieperBible Liquid Oatoamor

IMCO FQAMBAN

**700 W300

LOT

Ficiccuieting Agent tMCOFLOC Btrafioc

* P e r e t o « 4 0 t n y d «

Fkga i t .

I M C O P R E S f « V A i _ O i D

* ' J«oo« M y - L o - J * .. P r e s e r v a t i v e

Preservative

AII puipoaa imtotmm

Uae« *o drop a M M solid* where clea r water ta desirable for a drilling

Prev en ta starch from fermenting when uaed m muda of lees than saturation gr a Ik al .n ity laaa than 1 0 CC

F ib roua Material

N u t Sheiia F i r *

LOST CIRCULATION MATERIALS I M C O CEC A R F ' d t. - h»r . Mii-f .be- FHter aa wait as m a t t i n g m a t e r i a l

IMCO P L U G .. •n-Nu' .. Nut-Plug MM-Ptug Moat or- .n uaed to prevent loet o rcu-

•edium IMCO PLUG Well-Nut Nu t -P i j g

Coarse IMCO PLUG Wan-Nut Nut-Plug

Ma-Plug

Mii-Piug

Uaed In conjunction with ftbure or f 'aaaa to regain tost circulation

Used where lerge crevices or fracturea • r* • n c O < " M * - * d

G r o u n d Mica F ina

C o a r t *

Cel lophane

C o m b i n a t i o n o f . granules fta*** and f ib'ouamatenaiaof various Biiea - on* sac*

IMCO MYCA

IMCO MYCA

IMCO FLARES

KWIK SEAL

Micate*

Micato*

J M Flake

Kwi«-Seal

Magco-Mica

Magco-Mica

Ceii-O-Seel

Kwih-Seai

Miimica

Miimica

Miifiake

Kwik-Seei

Uaad for prevention ot tost circulation.

Forms a good mat ai face of wellbore

Uaad to regem loet circutetion

Uaad where large crevice* or fracturea • '•••"•countered

SPECIALTY PRODUCTS Blended inhibit!** IMCO SC PAC Batta

Primary inhibiting agent

B lended Polymera IMCOEVPAC apauiaUng agent for INPAC Sya'em

A l h e l m i t y C o n t r o l Reagent

I n h i b i t i n g A g e n t

IMCO AC PAC

IMCO IE PAC

Peer ent for controll ing a Ik - unity m fhe INPAC System

I mparte high temperature fluid loaa control, temperature stability and in­creased inhibition.

Sha le Control IMCO SCP T-S. r e a g e n t

Caitrol

Bentoni te E» tender IMCOGELEX Bene* Bene* Bene*

C ai c i um chloride mud for inhabiting tha swelling of bentoniuc shale*.

increases yield of bentonite to 'orm very low solids dnllmg fluid

3

Pascription IMCO SERVICES Barold Magcobar Mllcham Primary Application

I M C O P T - 1 0 2 C o e t - C l t i S M a g c o i n h i b i t o r A r r u - T e « C o r r o n o n i n h i b i t o r C o a I - « 1 5 N o 6

p e c i e i i y B l e n d e d t m e C c m p o u n d e

SynaKg.a t ac B l e n d

I M C O S U L F - x M i l - G u a r d

• i K t t P O L V B a Raamea

' o r u e e ea a h y d r o g e n e u i l i d e s c s « e n -ga r i n w a t e r - b a a a m u d e

P n e o l o g i c a l t t e S i t u a t i o n a n d f i l t r a t i o n c o n t r o l

L i q u i d C o r r o s i o n lnr . i t> . tor

I M C O C R A C K C H C K P r e v e n t s t r e s s - c r a c k i n g o f d r i l l a t rmga m a n H f S e n v i r o n m e n t

S o d i u m C n r o m a t e

S o d i u m H y d r o a i d e

S o d i u m C a r o o n a t e

COMMERCIAL CHEMICALS

C h r o m a t e C h r o m a t e C h r o m a t e

Caus t i c S o d a C a u s t i c S o d a C a u s t i c S o d a

Soda A an S o d a A s h S o d a A a h S o d a A s h

S o d i u m S o d i u m S o d i u m S o d i u m U a a d m w a t e r - b a s e m u d s t o p r e v e n t C h r o m a t e h i g h t a m p e r a t u r e g e l a t i o n

C a u a t i c S o d a F o r p M c o n t r o l m w a t e r - b a s e m u d s

F o r t r e a t i n g o u t c a l c i u m s u l f a t e >n l o w p H m u d s

S o d i u m B i c a r b o n a t e S o d . u m S o d i u m S o d i u m B i c a r b o n a t e B i c a r b o n a t e B i c a r b o n a t e

S o d i u m f o r t r e a t i n g o u t c a l c i u m s u l f a t e o r B i c a r b o n a t e c e m e n t m n i g n pM m u d s

B a r . u m C a r b o n a t e B a r i u m C a r o o n a t e

A n h y d r o a B a r i u m C a r b o n a t e

B a r . u m F o r t r e a t i n g o u t c a l c i u m s u l f a t e ( p H C a r b o n a t e s h o u l d be a b o v e 10 f o r b e s t resu l ts )

C a l c i u m S u l f a t e G y p s u m G y p s u m G y p s u m G y p s u m S o u r c e o f c a l c i u m fo r f o r m u l a t i n g g y p m u d a

C a l c i u m H y d r o n d e

j s o d i u m C h l o r i d e

L . m i

Salt

L i m e L i m e L i m e Sc ju rce o l c a ' c i u m l o r f o r m u l a t i n g l i m e m u d a

S a l t S a i l S a l t F o r s a t u r a t e d sal t m u d s a n d res is t i v i t y c o n t r o l

C h r o m a A l u m ( C h r o m i c C h l o r i d e )

C h r o m e A l u m C h r o m e A l u m C v o m e A i u m . . C h r o m e A i u m F o r u s e >n c r o s s - i i n k . n g X C P o l y m e r s y s t e m s

' i n ve r t E m u i s . o n S y s t e m

I M C O K E N O L - S a n d

I M C O KEN-X

OIL BASE AND INVERT EMULSION SYSTEMS I n v e r m u l V e r t o i l C e r b o - T e c D r i l l i n g f i u ' d s u a e d w h e r e e a t r e m e i y

n«gn t e m p e r a t u r e s a r e e n c o u n t o r e d . a l s o a d r i i i m g c o m p l e t i o n , o r w o r k o v e r f m O a p p l i c a b l e w n e r e o n l y o i l c o n t a c t w i t h f o r m a t i o n s is d e s i r e d

' O i l B a a a M u d I M C O * E N - S U « » F I 6 M E O iHaxe F o r d n l l m g w a t e r s e n a i l i v e f o r m a t i o n s

n m a r y E m u l a i l i e r I M C O K E N O L - S ( L ) I n v e r m u l a n d

I M C O K E N - X C o n e a i ( L )

OIL MUD ADDITIVES Ver toH C a r b c - T e c ( O ) P r i m a r y a d d i t i v e s t o f o r m a tab ia wa te r -

a n d i n - o H a m u i S i o n C a r b o - T e c U . )

Jr . s e o * . ' e r a n d G e l l i n g A g e n t

I M C O K E N G E L . . . G e l - T o n e a n d a n d

I M C O K E N - X C o r . c t 2 P a t r o - T o n e

VG-69 C a r b o - G e i P r o v i d e s v i s c o s i t y , w e i g h t s u s p e n s i o n , a n d l u t r a t i o n c o n t r o l

• l i g h T e m p e r a t u r e S t a b i l i z e r

I M C O K E N - X C o n e »3

D u r a t c n e M T D v - ? 2 a n d D V - 3 3

I m p r o v e s e m u l s i o n u n d e r h i g h t e m p e r ­a t u r e c o n d i t i o n s

D e s c r i p t i o n SERVICES Barold Magcobar Mllcham fTlmary Application

S i » i i . i H B » t n o H I M C O VP C o o a . i . o « »

S t a b i l i z e * r u n n i n g a n e * ^Tip-Ovet • m u l t i o n w * . g n t S u s p e n a i o n e n c llu<d I O M u n d e r h .gh t e m p e r a t u r e c o n d i t i o n *

D r s p e r t e n t I M C O K E N O M C o n d V r m m i T H I N O r . l t r e a t S I 11

Dispersant ler reducing rbeoiog>cai properties

Calcium Oetde IMCO K ENO X Caioum aource ior saponiiicaiion

Fai ry AC iO Emuiaifier

IMCO KEN . . SUPREME Cone A

O i i i a i e Primary em u i».f.*» and stabilizer lor o>i-base dril l ing fluids

Emulsion S t a b i l i z e r

IMCO KEN SUPREME Cone 8

DG-S5 imparts gets contributes to »i*co*ity lor we<gni suspension and provides I ill ration control

Specia l ! f Modi f ied I M C O K E N Saponif ied Fatty PAK Ac idCnemica is

SF-iOO G e t l m g a g e n t l o r f o r m u l a t i n g n g n ge t -lation casing pec*s

Powdered w e t t m g Agent

I M C O REN C A L Dispersing agent in KEN-X systems w i inaCeCi , water mterrai phase

tfFLBX-HOSE

6* NCR VALVE

Hf WAFER VALVE W/ PNEUMATIC CONTROL

DIVERTER SYSTEM \ REHROO RIG 82

CONTINGENCY PLAN HIGH ISLAND BLOCK A-162

OCS-G-6198

P l a c i d O i l Company m a i n t a i n s at i t s own expense v a r i o u s

t y p e s o f equipment t o d e a l w i t h o i l s p i l l s . I nc luded are

booms large and s m a l l v e s s e l s , skimmers and the l i k e .

P l a c i d f i l e d a r e v i s e d O i l S p i l l Cont ingency Plan February 28,

1 9 8 5 , which was approved March 8, 1985. A d d i t i o n a l l y ,

• .hey a re a .uember o f Clean Gul f Assoc ia tes f o i Areas I , -

I I , and I I I . In ;he even t t h a t a s p i l l o c c u r s , even though

i t mav not have o r i g i n a t e d w i t h a P l a c i d o p e r a t i o n or f a c i l i t y ,

an a l e r t procedure i s iTimediacely i n s t i t u t e d . Immediate

n o t i f i c a t i o n i s made t o t h e O i l Discharge Response Coord ina to r

i n Houma and to the a p p r o p r i a t e Federal and S ta te Agencies .

A t t h e same time e f f o r t s a r e begun t o s top and c o n t a i n

t h e s p i l l and t o assess w h a t , i f any, equipment w i l l be

needed .

I f the s p i l l i s t o o l a r g e f o r the o n - s i t e personnel

t o c o n t r o l , company equ ipmen t , f a c i l i t i e s , and personnel

w i l l be immediately m a r s h a l l e d and, i f needed. Clean Gulf

A s s o c i a t e s w i l l be c a l l e d i n . P l ac id bases a t Houma, I n t e r -

c o a s t a l C i t y , Cameron, and Corpus C h r i s t i are on a c o n t i n u a l

s t a n d b y basis w i t h a p p r o p r i a t e con t ingency responses assigned

t o t hem. Clean Gul f A s s o c i a t e s has i t s main base a t Grand

I s l e . I n the Texas a r e a . Clean Cul f m a i n t a i n s equipment

EXHIBIT V I I

at bases in Galveaton (Texaa City) and Rockport (Pulton).

The project area i s 65 miles by boat from Galveston or

8 hours traveling time; 160 miles by boat from Intercoastal

C i t y of 19 hours t r a v e l i n g time; and 105 milea by boat

from Cameron or 12 hovrs traveling time.

•

A l l p rocedures , p e r s o n n e l , and equipment are designed

t o be i n compliance w i t h OCS Order No. 7 ( P o l l u t i o n and

Waste C o n t r o l ) .

SHALLOW HAZARDS REPORT

HIGH ISLAND AREA BLOCK A-162

OFFSHORE TEXAS

Prepared f o r :

AMINOIL U.S.A,

Job No. 83127.07 OCEANONICS, INC. March, 1984

SHALLOW HAZARDS REPORT

HIGH ISLAND AREA BLOCK A-162

OFFSHORE TEXAS

I . INTRODUCTION

OCEANONICS, INC. completed a s h a l l o w hazards survey o f Hiqh

I s l a n d Area Block A-162 f o r A m i n o i l U . S . A . on December 1 1 , 1983.

H i g h I s l a n d B l o c k A-162 i s l o c a t e d a p p r o x i r a t e l y 60 m i l e s

s o u t h e a s t of G a l v e s t o n , o f f the Texas Coast ; O.C.S. lease number

6 1 9 8 .

The survey was conducted and the r e p o r t w r i t t e n a c c o r d i n g t o

g u i d e l i n e s set * c r t h by the M i n e r a l s Management S e r v i c e . A

s u r v e y boat u t i l i z i n g an I . D . S . n a v i g a t i o n system w i t h Loran "C"

n a v i g a t i o n s i g n a l s ob t a ined d i g i t a l s ide scan sonar ,

magnetometer, h i g h r e s o l u t i o n subbot tom p r o f i l e r , d i g i t a l

s p a r k e r , and f a t h o m e t e r da t a . A d e s c r i p t i o n o f the survey

i n s t r u m e n t a t i o n i s f ound i n Appendix B and the towing

c o n f i g u r a t i o n o f t he survey equipment i s shown i n F i g u r e 1 . The

d a t a c o l l e c t e d has been c o r r e l a t e d i n order t o p r o v i d e an

a n a l y s i s of the b o t t o r and subbot tom c o n d i t i o n s . A l l the

f i n d i n g s have been g r a p h i c a l l y reduced t o p l a n maps

• S-83127.07-D, ( shee t s 1 -4 ) .

1

I I . SITE AN. LYSIS

A. B a t h y m e t r i c I n t e r p r e t a t i o n

The 3.5 kHz subbottom p r o f i l e r records were used f o r the

b a t h y m e t r i c i n t e r p r e t a t i o n (see sample r eco rd o f f i g u r e 8 ) .

Wa te r depths were o b t a i n e d d i r e c t l y f r o m the r e c o r d s . Depth

c o n t o u r s were drawn at 2 fooc i n t e r v a l s and r e f e r e n c e d t o l o e * l

s e a - l e v e l at the t ime of the su rvey , as d i s p l a y e d or the

B a t h y m e t r y Map, F i g u r e 4. No c o r r e c t i o n s were made f j r t i d a l

v a r i a t i o n .

The s e a f l o o r s lopes very g e n t l y t o the s cu th - sou theas t

( average g r a d i e n t - . 0 4 1 ) . Water depths ranoe f .om a minimum of

122 f e e t at the n o r t h e r n block boundary t o a maximum o f 128 f e e t

a t the southern b o u n d a r y .

B . Side Scan Scnar and Magnetometer I n t e r p r e t a t i o n

The S e a f l o o r Mapping Byst*".i ( d i g i t a l £.idt» scar sonar)

and magnetometer w e i t u t i l i z e d o- » u l survey l i n e s i n r r d e r t o

l o c t t e and Dv s i b l v i d e n t i f y f o r o i g n o b j e c t s . The " e a t l o o r

Mapp ing System d i s t i n g u i s h e s o b j e c t s on the s e a f l o o r t h a t have a

d i f f e r e n t r e f l e c t i v i t y than the s u r d i n g m a t e r i a l ; commonly

t h e s e i-.clude e x i s t i n g p i p e l i n e s , v lheads , anchor p i l e , and

sunken vesse ls . The magnetometer d e t e c t s the f e r r o u s o b j e c t s i n

t r e area.

Side scan sonar records r e v e a l e d a r e l a t i v e l y smooth

s e a f l o o r w i t h no f e a t u r e s which c o u l d impede the implacsment o f

s t r u c t u r e s or c o n d u c t o f d r i l l i n g o p e r a t i o n s . The records d i d

show a few pock marks , some gas c . j u d s i n the water column, and

an anchor scar b u t these are i n c o n s e q u e n t i a l (see F i g u r e 5 ) .

2

The magnetometer data was g e n e r a l l y good w i t h a noise

l e v e l of two gammas. Occas ional n o i s e patches were observed on

l i n e s 2, 10, l i , 1003 , and 1005. T o t a l f i e l d measurements were

• l a o at tenuated on l i n e s 3, 6, and 1000.

Two u n i d e n t i f i e d anomalies were r ecogn ized w i t h i n the

surveyed area and o n l y one was l o c a t e d w i t h i n the c o n f i n e s o f the

b l o c k (see Anomaly map, f i g u r e 7 ) :

L ine No. Sho t P o i n t Mag. SMS 960 (ganmas) ( v i s u a l Yes/No)

3 12*175 10 N 1000 5*375 8 N ( o u t s i d e

b l o c k )

C. G e o l o g i c a l and Geophysical I n t e r p r e t a t i o n

The 3.5 kHz subbottom p r o f i l e r records r e v e a l t h a t the

s h a l l o w sediments o f the b lock can be d i v i d e d i n t o two separate

y e t i n t e r r e l a t e d d e p o s i t i o n a l s e t t i n g s . To the sou th o f the

dashed l i n e drawn on f i g u r e 7 t h e s t r a t a are p a r a l l e l and are

o r i e n t e d h o r i z o n t a l t o s u b - h o r i z o n t a l . P e n e t r a t i o n i s u n i f o r m ,

u s u a l l y to dep ths o f 30 f e e t below the s e a f l o o r . N o r t h o f the

dashed l i n e the u n i f o r m h o r i z o n t a l s t r a t i f i c a t i o n t e r m i n a t e s and

numerous i r r e g u l a r l y shaped channels are present ( f i g u r e 8 ) . The

d e p t h of subbot tom p e n e t r a t i o n i s g e n e r a l l y l e s s i n t h i s zone,

however, there a re some shal low and deeoer zones wh ich suggest

t h a t the p r o p e r t i e s o f the s o i l are v a r i a b l e .

The c h a r a c t e r i s t i c s o f these s o i l s and t h e i r

r e l a t i o n s h i p t o one ano ther i n d i c a t e s t h a t t h i s area was a s i t e

o f an ancient r i v e r channel and f l o o d p l a i n . The a o i l south of

3

c

the dashed l i n e i s older and the constant depth of penetration

suggests the s o i l has similar properties throughout. The area

north of the dashed l i n e represents the r i v e r ' s meander be l t .

Several channels are v i s i b l e w i t h i n t h i s b e l t but t h i s is normal

considering the s i n u o s i t y of Texas' low gradient r i v e r s .

A deep structure map was produced using the d i g i t a l l y

processed sparker records. The deep str u c t u r e dips towards the

east and three small f a u l t s ( a l l with throws less than f i f t e e n

feet) are present.

Amplitude anomalies were i d e n t i f i e d using the sparker

records. They are mapped in figure 7. One of these anomalous

zones (shown cross-hatched in f i g u r e 7) is s i g n i f i c a n t for two

reasons. F i r s t , * t is associated with a large f a u l t , and second,

the reflectors near the f a u l t appear to warp downward due to a

reduction in v e l o c i t y . These c r i t e r i a suggest that deep seated

gas is migrating towards the surface along the f a u l t plane.

The zone from the seafloor down to 700 feet (280 ms at

5000 ft/sec) i s characterized by opaque zones positioned adjacent

to "bright" areas (figure <») . These indicate dispersed gas in

the sediments; those containing more gas appear b r i g h t , those

containing r e l a t i v e l y less gas appear opaque. Some of t h i s gas

may be sourced from depth and some is undoubtedly biogenic. The

lack of a trapping mechanism indicates that overpressurina in

t h i s zone is u n l i k e l y .

4

H I . CONCLUSIONS AND RECOMMENDATIONS

Based upon an a n a l y s i s and i n t e r p r e t a t i o n o f the h igh

r e s o l u t i o n s e i s m i c survey d a t a , the f o l l o w i n g c o n c l u s i o n s and

recommendations are made c o n c e r n i n g the High I s l a n d B l o c k A-162 .

1) The u n i d e n t i f i e d magnet ic anomaly r e c o g n i z e d i n l i n e 1000 should be approached w i t h c a u t i o n o r , i f p o s s i b l e , avo ided .

2) The s o i l south o f the dashed l i n e i n f i g u r e 7 i s homogeneous and shou ld e x h i b i t s i m i l a r p r o p e r t i e s t h r o u g h o u t . N o r t h o f the dashed l i n e the s o i l w i l l have more v a r i a b l e p r o p e r t i e s due to the v a r i a b l e na tu r e o f c h a n n e l - f i l l d e p o s i t s . Emplacement o f s t r u c t u r e s w i t h i n t h i s zone or a long the bo rde r between the t v o zones should a n t i c i p a t e these i n c o n s i s t e n c i e s and proceed w i t h c a u t i o n .

3) The zone i n d i c a t e d i n f i g u r e 7 by a c r o s s - h a t c h e d p a t t e r n should be approached w i t h c a u t i o n o r , i f p o s s i b l e , a v o i d e d . I f d r i l l i n g must p roceed i n t h i s area then the "mud program" s h o u l d a n t i c i p a t e en t rapped gas.

4) The opaque-anomalous zone between e s e a f l o o r and 700 f e e t c o n t a i n s d i s p e r s e d gas , however , t h e r e i s no evidence o f a t r a p p i n g mechanism. T h e r e f o r e , i t should no t p resen t any problems t o d r i l l i n g or p r o d u c t i o n a c t i v i t i e s .

5) The deep C D . P . da ta shou ld be c o r r e l a t e d w i t h t he s h a l l o w seismic d a t a t o d e l i n e a t e deep sea ted f a u l t s and p o s s i b l e h i g h p res su re gas a c c u m u l a t i o n s which may e x i s t below the dep th o f t he da ta rev iewed .

Except for the above mentioned ccnut a other features

were detected which should impede anti - d r i l l i n g and

production operations within High Island Blcck A-162.

DanTel C. VlcQuilien Geolog ist/Geophysicist

Herman C. Sieck Registered Geophysicist

1 OWING C O N F I G U R A T I O N

FIGURE * 1

MISS LIZ M c C A L L 2

FATHOMETER

SUBBOTTOM

SPARKER

SIDE SCAN SONAR

125'

HYDROPHONES

MAGNETOMETER

H I G H I S L A N D A R E A

V I C I N I T Y M A P

F I G U R E 2

A. Fie)d Procedure

Prior to commencing the survey, a l i instrumentation was

checked for proper operation and found to be s a t i s f a c t o r y , each

l i n e was then surveyed. Seventeen (17) p a r a l l e l lines were

surveyeu one hundred f i f t y (150) meters apart in a north-south

dir e c t i o n . Six (6) t i e lines 1000-1005 were s-irveyed at nine

hundred (900) meter intervals in an eas'-west d i r e c t i o n .

While surveying each l i n e , the boat traversed a

preplotted course under the control of the Navigator. The

instrument records were mark d at the beginning of each l i n e and

at one hundred f i f t y (150) meter i n t e r v a l s . These f i x marks are

referred to as shot points (SP) and f a c i l i t a t e i d e n t i f i c a t i o n and

correlation of the records.

B. Sea State

The sea s t a t e during the survey was I I to I I I Beaufort.

C. Survey Instrumentation

The survey boats horizontal position was determined with

an I.D.S. navigation system u t i l i z i n g Loran " C navigation

signals.

Five (5) p r i n c i p a l e l e c t r o n i c marine surveying devices

were u t i l i z e d to o b t a i n information and data upon which t h i s

report is based:

19

E l e c t r o n i c Equipment

1. An EG*G SMS 960 Seaf loor Mapping System cons i s t ing

o f a sonar towf. i h , tow cable , microprocessor based dual channel

r e c o r d e r . The g r a p h i c record i s correc ted for s lant range and

boat speed. A s c a l e of 150M per channel was u t i l i s e d producing

100 percent coverage .

2. A V a r i a n V-85 Proton Precess ion Magnetometer

c o n s i s t i n g of a towed sensor, tow c a b l e , and a HP 7132 recorder .

A f u l l scale s e t t i n g of 100 gammas, one gamma per d i v i s i o n was

u t i 1 i z e d .

3. A h igh reso lu t ion subbottom p r o f i l e r system

comprised of a h u l l mounted EDO Transducer , an EDO 2*8E

T r a n s c e i v e r , and an EPC 3200 Recorder with reverse sweep. A 250

m i l l i s e c o n d s e c t i o n was produced with timing l i n e s every 25

m i l l i s e c o n d s . Data q u a l i t v was good.

4. A Raytheon Model 731 Fathometer. A sca le se t t ing of

2 f ee t per d i v i s i o n was u t i l i z e d .

5. A p r o f i l i n g system comprised of a towed e lectrode

s p a r k e r a r r a y , a hydrophone cable , a t r a c e r capaci tor bank, power

supp ly and an EPC 4600 Recorder. A *. ne second analoo sec t ion was

produced with t iming l i n e s every 100 m i l l i s e c o n d s .

2 0

ARCHEOLOGICAL SURVEY REPORT

BLOCK A-162

HIGH ISLAND AREA, TEXA.

Prepared f o r :

AMINOIL U.S.A.

Job No. 83127.07 March, 1984

Archeological Survey Report. Block A162. High Island Area.

Texas, for Aminoil U.S.A., Inc.

Under the provisions of memoranda from the United States Department

of the Interior, Minerals Managenent Service, Washington, O.C, the f o l ­

lowing report 1s submitted 1n fu l f i l lment of the st ipulat ions which provide

f o r archeological Invest igat ion of lease s i t es .

Survey Personnel and Duties

The survey was performed on December 5 through 11, 1983, by Oceanonics,

I n c . , on boarl the M/V M s * Liz MoGaiJ 21. Survey personnel Included 6.

D a l l y , R. Downs, R. Horne, R. McKenzie, S. Forbush, and J . Bakours.

Survey Location

The survey covered a l l of block A162 (OCS-G-6198), High Island Area,

located approximately s i x t y miles southeast of Galveston, Texas. The survey

l oca t i on was established with IDS posi t ioning.

Sea State and Weather

On the days when the survey was performed, the weather was clear

to pa r t l y cloudy. Seas were moderate.

Survey Instruments and Procedures lnstruaents used during the survey included magnetometer (Varlan

model V85), side scan sonar (EG&G SMS 960), subbottom p ro f i l e r (Edo Wes­

t e r n model 248), and fathometer (Raytheon model 741).

After the center pos i t ion of the survey area was established, a l ine

In te rva l of 300 aeters was run north and south, with east/west l ines run

a t 1000-meter i n t e r v a l s across the b l ock , «s s t i p u l a t e d i n Not ice to Lessees

no. 75-3 ( r e v i s i o n no. 1 ) , Department of the I n t e r i o r , Minerals Management

Serv ice .

A f te r a l l the da ta c o l l e c t i o n was completed, the records were examined

by the a rcheo log i s t .

Analys is of Data

1. Magnetometer^ Background magnetic values over the survey area

f l uc tua ted between 49471 and 49590 gammas. Data q u a l i t y was g e n e r a l l y

very good, wi th occas iona l patches of n o i s e . A possib le anomaly was noted

at shot point 16.3 ( c o r r e c t e d fo r sensor o f f s e t ) , l i n e 11 , but t h i s may

we l l be a mechanical s p i k e . No anomalies suggest ive of c u l t u r a l resource

features were seen.

2. Side scan sonar : The s ide scan sor.ar records were very good,

showing a genera l l y smooth and f l a t sea f l o o r throughout the b lock . Scat­

t e r e d pock marks were no ted , p a r t i c u l a r 1 / i n the nor thern p o r t i o n of the

b". ock. Sand r i p p l e s were seen through much o f the a rea , wh i le la rger exam­

p les of natural bot tom topography were noted on l i n e s 1 a id 15. Anchor

scars and t rawl marks were sca t te red through the b lock .

No targets sugges t i ve of c u l t u r a 1 resource features were seen i n

the side scan sonar r e c o r d s .

The bottom compos i t i on i n t h i s area i s repor ted to be s i l t y sand

(see Minerals Management Serv ice , Visual no. 3 , Regional Environmental

Assessment, August 1983) .

3. Subbottom p r o f i l e r : The subbottom p r o f i l e r records were good,

showing layered d e p o s i t i o n through much of the b lock , i n t e r r u p t e d by d i s ­

tu rbed and i n d i s t i n c t c u t - a n d - f i l l channel s t r u c t u r e s In the n o r t h . The

b lock 1s located i n an area of P le is tocene s h e l f deposi ts (see Minerals

Management Serv ice , V i sua l no. 2 , Regional Er.vlronmental Assessment, August

1963) .

4. Water depths ov«»r the survey area ranged approximately from '15

t o *20 f ee t .

0 •

5. Archeo log ica l ana lys is of data from ins t rumenta t ion : Ava i l ab l e

i n fo rmat ion i nd i ca tes no product ion or t ransmiss ion a c t i v i t y in t h i s block

(see Transcont inental Gas Pipe Line Corpora t ion map, September 19Ci ) , and

no evidence of such a c t i v i t y was seen i n the survey records.

No t e n t a t i v e shipwreck loca t ions have been assigned to t h i s or t o

t h e ad jo in ing b locks (see the Bureau of Lana Management, Visual no. 4 ,

p r t p a r e d in con junc t i on w i t h Lease Sale no. 62A), and no evidence of such

wrecks was seen i n t h e survey data.

The block i s l o c a t e d w i t h i n Zone 2 of the CuJtur* Resources Eva lu­

a t i o n i . the Nor thern C u l f o f Mexico Con t i nen ta l Shelf (Nat ional Park Ser­

v i c e 1977). suggest inc v.hat whi le shipwrecks are not h i gh l y l i k e l y , the

p o s s i b i l i t y of drowned p r e h i s t o r i c s i t e s should be considered. The water

l e v e l curve in the E v a i j a t i o n ind ica tes t h a t the area has been submerged

f o r approximately 11,SOO t o 12,000 years . This date f a l l s w i t h i n the theo

r e t i c a l range of hurran occupat ion along the Gul f Coast, although i t would

be a rather ear ly da te f o r the r ecogn i t i on or recovery o ' s i t e s . The sub­

merged geological f e a t u r e s seen in the subbottom p r o f i l e r records are not

s u f f i c i e n t l y we l l - p rese rved to suggest l i k e l y locat ions f o r the preserva­

t i o n o f drowned p r e h i s t o r i c s i t e s , and such s i t e s are Mot l i k e l y t o be

found at random.

No evidence o f a rcheo log ica l f ea tu res was seen i n the data presented

f o r block A152, High I s l a n d Area, Texas, f o r «minoi l U.S.A., I nc .

CULTURAL RESOURCE SERVICES, INC.

PLACID OIL COMPANY SUITE 1900

1440 CANAL STREET NEW ORLEANS, LOUISIANA 70112

(504)525-7921

•June 20. 1985

Minerals Management Service United States Department of the I n t e r i o r P. 0. Box 7944 Metairie, Louisiana 70010

Attn: Mr. Donald W. Solanas

Dear Mr. Solanas:

A hazard survey was shot over High Island Block A-162 by Oceanonics INc. on December 11, 1983.

I have reviewed the written report and see no d r i l l i n g hazards evident at any of the following location.-:

Well Locat ion

"A" 4500' FSL & 3000* FFL

„ B „ 2500' FSL & 2000' FEL

"C" 7050* FSL & 4200' FEL

„ D , . 5850' FNL Sc 5800' FEL

"E" 5000' FNL & 2900' FWL

A copy of the data nearest each location i s being sent under separate cover. The remaining data i s on f i l e i f further review is necessary.

Re: Wellsite Locations High Island Area Blk. A-162, OCS-G-6198 Offshore, Texas

D i s t r i c t Manager

DC/bcr

AIR QUALITY REVIEW For

High Island Area Block A162 OCS-G-6198

Placid 011 Company 3900 Thanksgiving Tower

Dallas, Texas 77520

Submitted To james E. Jordan

Administrative Assistant

July 24, 1985

* * *

Prepared by: JOHN E. CHANCE 8 ASSOCIATES, INC.

Regulatory and Environmental Division Lafayette, Louisiana Project No. 85-8197

J ... C. Chance at Assoc., Inc.

PROJECTED AIR EMISSION SCHEDULE FOR EXPLORATION PROJECT

I. General Infornation

Location of Facility - High Island Area Block A162 Name of Rig/Platform - Jack-up Owner /Operator - Placid Oil Company Address - 3900 Thanksgiving Tower

Dallas, Texas 77520 Contact Per on - James E. Jordan

Administrative Assistant Project Start Date - September 7, 1985 Project End Date - March 10, 1986 Total Well Footage to be Drilled - 50,000 Distance Offshore - 64.0 miles

I I . Findings of A1r Quality Review

As per DOI.MMS regulations this facility Is exempt from further air pjalUy review as it has been determined that Its operation will not have a significant adverse environmental Impact on air quality.

I I I . Total Emissions at Rig/Platform

AHuwable Projected Emission Emitted Emissions Emissions Status Substance (tons/yr) (tons/yr) (OK/NG)

CO 54400.00000 17.5 OK SC? 2131.2 1.4 OK NOX 2131.2 119.006 OK VOC 2131.2 6.03 OK TSP 2131.2 .02 OK

IV. Total Supply I Crew Boat Emissions at Galveston, Texas

Emitted Projected Status Substance (s) Emissions (OK/NG)

(tons/yr)

CO 14.004 OK S02 * • NOX 97.9 OK VOC 5.3 OK TSP * *

•John E. Chanco et Assoc., inc.

V. Total Helicopter Emi-;Ions at Galveston, Texas

Enitted Substance (s)

Projected Emissions ( tons/yr)

Status (OK/NG)

CO S02 NOX VOC TSP

.4

.01

.04

.04

.02

OK OK OK OK OK

VI . Transportation Services Data

Supply Boats (3000 hp)

Port - Galveston, Texas Halting Time - 24 hrs./day Trips Per Week - 3

Crew Boats (2500 hp)

Port - Galveston, Texas Halting Time - 1 hrs . Trips Per Week - 14

HelIcopters

Base - Galveston, Texas Trips Per Week - 3

Other (Explain) - N/A

•The EPA does not provide S02 and TSP emission factors for boats nor does 1v provide TSP factors for drilling.

John E. Chanco £ Assoc., Inc.

VI I . Factors Used In Calculations

Er ssion Factors for °ower Generation

Emitted Dr i l l i ng Substance(s) (Ib/hp-hr)

Cu .0042 S02 .0019 NOX .028 VOC .00095 TSP *

Emissoi. Factors for Helicopters and Boats

Emitted Helicopters Boats Substance(s) ( l b / c o W - l T O ^ ( lb /gal )

CO 5.7 .0598 SO? .18 NOX .57 .4196 VOC .52 .0226 TSP .25 *

Other Factors D r i l l i n g Power Generation - 60 hp-hr / f t Fuel Consumption by Boats - .0959 gal/KW-hr

VIII. Methodology

Rig/Platform - horsepower-hour method Boats - horsepower-hour method Helicopters - landing/takeoff (LTO) cycle method

IX. References

Dr i l l i ng -EPA-450/3-77-026 (June 1977) - "Atmospheric Emissions From Offshore 011 Development and Production", pp. 81-92.

Boats and Helicopters - EPA Report AP-42 - 'Compilation of A i r Pollutant Emission Factors", 3rd ed i t i on , .August 1977), pp. 116, 12; 127.

• The EPA does not provide S02 and TSP emission factors for b ^ : s nor does I t provide TSP emission factors for a r i l l 1ng .

John E. Chance at Assoc., Inc.