Tenneco Oil Exploration and Production

PLAN OF EXPLORATION - SUPPLEMENT

EUGENE ISLAND AREA

BLOCK 172 (OCS-G-5494)

To further evaluate the commercial quantit ies of o i l and/or gas

in Eugene Island Block 172, Tenneco Oil Company, as operator of the lease,

proposes to conduct addit ional exploratory d r i l l i n g operations.

Plans are to commence d r i l l i n g operations November 27, 1985 on

OCS-G-5494 Well " I " , u t i l i z i n g the Marlin IV Dr i l l i ng r i g . The proposed

wel l is estimated to require 60 days to d r i l l . Four other wells are

proposed, contingent upon the outcome of Well " I " . The fol lowing is the

proposed surface locat ion of each we l l , in addition to the estimated time

required in d r i l l i n g each we l l :

WELL PROPOSED SURFACE LOCATION ESTIMATED DRILLING TIME

I 620' FSL & 2220' FWL of 60 days EI 172

J 650' FSL & 1500' FWL of 65 days EI 172

K 3300' FSL & 2800* FWL of 70 days EI 172

L 4200' FSL & 3000' FEL of 75 days EI 172

M 700' FSL & 1000' FEL of 70 days EI 172

All drilling operations will be completed by November I , 1986.

Attached are the drilling rig specifications of the "Marlin IV" illustrating the rig's important features, and including information pertaining to safety and pollution prevention and control. The rig will be equipped with typical pollution control equipment, including, but not limited to, storage facilities, deck drains, su,.ips, drip pans, and sewage treatment facilities. Life-saving appliances and firefighting equipment on the "Marlin IV" will be in accordance with U. S. Coast Guard Regulations.

A Shallow Hazard Survey Report for the proposed well locations done in-house by Tenneco, is enclosed for your review. One copy of the High-Resolution Survey Data from the two lines closest to each well location has been forwarded to the appropriate MMS District Office, in accordance with the requirements of NTL 83-3.

Jn Reply Refer To: KP-2-1 0£l 2 8 I'JtfS

Tenneco 011 ' 1 o n t Ion * i u Production Attention: h. I>1th Ououls Post Office Box 39100 L « f t y e , Louisiana 70503

Gentl emen:

Reference 1s made to your Supplemental Plan of Exploration received October 25, 1985, for Lease 0CS-€ 5494, Block 172, Eugene Island Area. This plan Includes the activities proposed for WelH I through M.

In accordance with 30 CR 250.34, revised Lec?«her 13, 1979, and our letter diteu January 29, 1979, this plan has been determined to be compl- e as of Oetc&er 28, 1985, amrf i s new being considered for approval.

Your plan control viumber is *- l /35 and should be referenced 1n your commont ca­ul o* and correspondence concerning this plan.

Sincerely yours,

i 0 i * * u n o , , a l d G i f 0 i r

Acting Regional Supervisor Rules and Production

bcc: Lease OCS-G 5494 (OPS-3-2) (FILE ROOM) iOPS-3-4 w/Publ1c Info. Copy of tre plan (PUBLIC RECORDS ROOM)

A0Gobert:rbr:10/28/85 Disk 3A

Tenneco Oil Exploration and Production A Termecu Company

Centrd Gull Division PO Box 39100 Lafayette. Louisiana 70503 (318)981-700C

October 24, 1985

0CT^5jS85

U. S. Department of the Inter ior , Minerals Management Service * " 3 1 "C 3 ,-'C T , t , N

P. 0. Box 7944 Metai r ie , Louisiana 70010

A t t n : Mr. A. Donald Giro i r

Re: Plan of Exploration - Supplement Eugene Island Block 172 OCS-G-5494

Gentlemen:

Attached are nine (9) copies of the Plan of Exploration - Supplement re la t i ve to Tenneco Oil Company's OCS-G-5494 lease i a Eugene Island Block 172.

The Structure Map and Schematic Cross Sections are considered proprietary data to be exempt from disclosure under the Freedom of Information Act, and should therefore not be made available to the public or provided to any affected state or to the executive of any local government. In this respect, proprietary data has been removed from a l l but f i ve (5) copies o f the Plan of Exploration - Supplement.

Should you require any further information, please contact me at (318) 269-7612.

Yours very t r u l y ,

TENNECO OIL COMPANY il.Gulf Division

L T O C P I 2 0 A 9 81

Tenneco Oil Exploration and Production Plan of Exploration - Supplement Eugene Island Area Block 172 (OCS-G-5494)

A Plan of Exploration - Supplement Plat done by John Chance and

Associates, depict ing the proposed surface location of the proposed

wel ls , is attached. Also included, is a v i c i n i t y map showing the

relationship of Eugene Island 172 to the shoreline.

A description of the onshore base f a c i l i t y at Intracoastal Ci ty,

louisiana, is enclosed for your review.

Water depth in the area is approximately 66 feet.

The Well Information Attachment includes the proposed surface

lecat ion, proposed bottom hole locat ion, measured depth, and true

vert ical depth of each of the proposed wel ls . A Structure Map and

Schematic Cross Sections, ref lect ing the most current geological/

geophysical in terpre ta t ions, are enclosed for your review. These

attachments are considered proprietary data and should be exempt from

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

implementing regulat ion (43 CFR Part 2 ) .

Pleab refer to t h * Air Quality Calculations to comply with Air

Quality Regulations 30 CFR 250.57.

A brief descr ip t ion of equipment, personnel, and procedures to be

employed for preventing, reporting, and cleaning up a pol lut ion s p i l l ,

including equipment, deployment, and travel time, is attached.

See the attached l i s t of mud components to be used during the

d r i l l i n g of the w e l l .

All other information previously submitted 1n the I n i t i a l Plan of

Exploration remains the same.

The MARLIN No. 4 self-elevating type mobile drilling platform is ooe of the largest and most versatile offshore drilling rigs ever built. It is cap - of operating in 157' of water with 40' wave clearance (air sp. ) during Hurricane season. Through the remainder of the year it will operate in 172' of water with 25' wave clearance, (air space) With its generous storage capacity for supplies, and its air-conditioned accommodations for a 52-man crew, tbe rig can operate for considerable periods of time without servicing from the outside.

As the builder of the MARLIN No. 4, Bethlehem at Beau­mont drew on construction facilities and experience unequaled by any other yard in the world.

As the designer, Bethlehem drew oo research and develop­ment work conducted over the past two decades at a cost of several hundreds of thousands of dollars. This research includes eleven years of actual experience in platfonn operation. Among the agencies which contributed to this program:

University of Michigan, Ann Arbor, Mich.

Stevens Institute, Hoboken, NJ.

Texas A A M College, College Station, Tex.

Lamar State College of Technology, Beaumont, Tex.

Gulf Research Corporation, Pittsburgh, Pa.

Greer ft McClelland, Houston, Tex.

Gulf ' .lsultants, Houston, Tex.

Rocky Moutain Hydraulic Laboratory, Colo.

MARLIN NO. 4 MOBILE DRILLING PLATFORM

FACILITIES AND EQUIPMENT

General Dimensions

The MARLIN No. 4 consists of three principal parts:

1. The mat or foundation 210' long x 170' wide x 10' deep with a 2' scouring skirt. Slot in mat is 8)' long x 90' wide.

2. The platform containing all working and living areas, heliport and equipment. Platform is 168' long x 86' wide r 20' moulded depth at sides. Sloe in platform is 50' long x 30' wide.

3. Three cylindrical columns Ity diameter x 234' long.

Quarters

Air conditioned quarters for 52 men, including galley, pantry, freeze and thaw walk-in reefer, office, hospital and storage areas. Maximum occupancy of each room is four men. The galley is equipped with modern electrical appliances including steam table and baking and barbecuing equipment. The mess room-galley is arranged for cafeteria style serving. A large recreation room is equipped with television, card table and comfortable chairs for off-duty personnel.

A laundry with commercial type washer, extractor and dryer is provided for the convenience of the crew

A control room is provided topside for thr complete operation of all packing equipment.

Fluorescent lighting is installed throughout the platform in both the quarters and machinery areas.

A Hose McCann sound-powered telephone systea provides units at 17 strategic locations throughout tbe platform and skid unit.

1

Storage Faci l i t ies

4 Dril l ing-water tanks with a total capacity o f 4,680 barrels.

2 Potable-water tanks with a total capacity o f 690 barrels.

2 Fuel-oil tanks with a total capacity o f 1,300 barrels.

3 Active mud pits wi th a total capacity o f 1,200 barrels.

1 Dir ty lube oil tank wi th a capacity o f 2,500 gallons.

1 Fuel oi l day tank with a capacity of 1,700 gallons.

2 Lube oil storage tanks with a total capacity o f 830 gallons.

6 Pressure tanks wi th a total capacity of 6,300 cubic feet. Any of these tanks can be used for either barite or cement. A dual pneumatic pressure transfer system assists the loading, unloading and transfer­r ing of bulk materials. A surge tank and weighing scales arc provided for the weighing and mixing of barite. A surge tank is also provided for the mix ing of bulk cement. A pressure vessel is provided for unloading of bulk materials delivered to the platform in bulk cans. Storage area is provided for 2.000 sacks of barite or cement.

The pipe rack deck has adequate storage area for 15,000' of 3" dri l l pipe and necessary drill collars and 15,000' of 9>f" O D casing.

Painting and Corrosion Protection

Al l exterior surfaces o f the platform and skid unit are coated wi th inorganic zinc and finished with an epoxy color coat.

Interior machinery areas of the platform are finished with an alkyd enamel coating.

Columns i r e coated with inorganic zinc.

2

Interior surfaces of the floodable compartments of the mat are protected by magnesium anodes.

Exterior surfaces o f the mat and columns below the wateriine are protected by an impressed current anode system of cathodic protection.

Interior surfaces of columns are protected by aluminum anodes.

Interior surfaces of the buoyant compartments o f the mat are coated wi th a petroleum base inhibitor.

Interior surface o f the dri l l ing water and ballast tanks and voids is coated with a petroleum base inhibitor.

Interior surface o f t h e potable water uni ts is coated wi th a petroleum base inhibitor, as approved by U S C G. and other agencies for this use.

Safety Equipment

2 Elliot 25 man self-inflatable type life rafts.

2 Six-man life floats.

4 Ring buoys.

52 Life preservers.

I General Alarm System.

1 Fixed dry chemical-type fire extinguishing system.

13 Fire stations.

28 Portable fire extinguishers.

1 Set obstruction lights. 1 Fog signal.

1 First aid kit . 1 Litter.

3

Machinery and Equipment

Plat form jack ing equipment

6 Hydraulic pumping units, all driven by AC electric motors with remote electric control from control console.

18 Hydraulic cylinders.

1 Control console. *

Skid unit jacking equipment

1 Hydraulic pump, driven by AC electric motor with control console.

4 Hydraulic cylinders.

A i r compressor,

For bulk cement and mud systems two units: Gardner-Denver ACH with 30 HP AC electric motors.

For general service, two units: Ingersoll-Rand Type 40, Model H4i '3H with 40 HP AC electric motors. These units are connected to a common air receiver tank battery.

For start-up air, one unit: Ingersoll-Rand Type 30, Model 15T with Lister Diesel engine. This unit is connected to the air receiver rank battery.

Pumps

Vertical-turbine, deep-well pumps, two ut.its: Johnston 2-stage 12ES water-lubricated, rated a: 1400 GPM at 106' total head, with 50 HP AC electric motors

3 Bilge pumps in pod houses, Johnson IOCS, 500 GPM 25' head with 5 HP AC electric motors.

For fire and bilge, two units: Mission 2" x 3" Rl I centrifugal, with 30 HP AC electric motors.

4

For fuel-oil transter, two units: Goulds Model 1942 size #7 rotary, with 3 HP AC electric motors.

For dirty lube o i l , one unit: Goulds Model 1942 size # 4 rotaty, with \Yt HP AC electric motor.

Miscellaneous

1 Meco Model PEE 300K distiller, with 40 HP AC electric motor for compressor. Rated at 7,200 GPD.

3 Pressure sets, all Rath Water Systems: two 1 HP pumps for potable water, two 1̂ 3 HP pumps for sanitary water, and two 3 HP pumps for salt water supply to distiller unit.

2 Unit Mariner Model whirley cranes with 50-ton capacity, one with 65' boom and one with 75' boom located diagonally opposite pipe rack deck.

1 National Type 2250-ER jingle drum, 2 speed anchor winch with 50 HP AC electric motor. Drum contains 1,540' of l j ^ " diameter wire rope with maximum pull of 36,000 # .

2 Lincoln Shield Arc SAE welders. Model S-7046. 400 amp electric.

1 Danforth type (light weight) 12.000# anchor.

1 Air conditioning and heating system, rated at IH tons.

1 RCA Type CRM-P7A-130 radio-marine telephone.

1 King remote platform tank gaging system. Gages, located in the control room, calibrated to read in 42-gallon barrels, and in feet and inches, for each of 14 tanks.

1 Single sideband radio.

5

Power Equipment

2 E M D SR16EW-645. 2,200 HP diesel e lectr ic power packages. Each unit lus one D-32 generator and two D-79 D C generators, complete with necessary generator and motor control cabinets, drawworks and mud pump control panels. These power packages furnish power for the drawworks, dri l l ing pumps, rotary and Hall i ­burton pump unit.

2 Caterpillar D-398 G E. Marine Type 500 K W AC electr ic sets, with AC distribution panel. These units furnish power for all plat­form electrical equipment and auxiliary dri l l ing equipment. This includes power for the hydraulic jacking system used for raising and lowering the platform.

Derrick, Derrick Substructure and Skid Base

1 Skid base 30' x 30' which spans the 50' wide drilling slot. This unit supports the derrick substructure and contains a cellar deck level for the handling and storing o f blow-out preventer equipment.

1 Unitized derrick substructure 30* x 30' w i th 48' x 54' steel deck area. This substructure contains and supports the drawworks unit, rotary unit, Schlumbetger unit, choke manifold, B.O.P. closing unit , B.O P. handling equipment (air-operated winch), air receiver tank, hydraulic power units, standpipe manifold, derrick and derrick equipment.

Both o f the above units are equipped with hydraulic jacking

systems for jacking both longitudinally and transversely. This

allows the rotary to be aligned for the dri l l ing of nine wells on

eight foot centers within the 50' x 50' dr i l l ing slot.

1 Lee C. Moore 30' x 30' base x 147' high welded-type der r i ck having 1.392,000 # capacity and 100-mph wind load capacity with 15.000' o f 5 " dri l l pipe racked. Water table opening 6' x 8', complete wi th dri l l pipe and drill collar racking equipment, adjustable monkey board, adjustable casing stabbing platform and metal wind breaks.

I Hutchison heavy duty fluorescent l ight ing system for derrick,

6

derrick substructure, and cellar deck of skid base. The drilling sloe and pipe rack deck areas are lighted by eight mercury vapor lights.

Hoisting and Complementary Equipment

1 National Type 1625 D.E. d rawworks nominally n t :d at 2500 input horsepower, powered with two E M D Model D-79 DC electric motors. This drawworks unit is equipped with a sand line reel having a capacity of 20,500' of * « " wiie line. Model 7H38 Elmagco eddy current brake, complete with heat exchanger cooling, National Model 6 13 Mictomatic dri l l ing control. Model T L B Crown-o-matic safety control, and Model 54 Coastal sand line guide.

1 National Type 760F c r o w n b lock with 60 " diameter sheaves grooved for i H " <lrill line, complete with sand line, cat line, and tugger line sheaves.

I National 660-G-500 hook -b lock assembly with 500 ton capacity. The traveling biock has 52" diameter sheaves gooved for \ \ ^ [ ' drill line.

1 National Type N-1324 swivel equipped with a Foster Type 77 hydraulic-powered keliy spinner and a Gy s" O D. Omsco 15,000# test safety valve.

I 5 ^ " x 54' overall API hexagonal forged alloy steel ke l iy with a ^4" bote.

1 National C-365 rotary table un i t with 3<>H" table opening. The

unit is powered by one E M D Model D-79-DC electric motor driving

through a two speed, 500 HP gear transmission. Equipped with

split rotary master bushing. National pin-type keliy drive bushing

and split-type master casing bushings.

I Ser Kelco air operated power rotary slips for use with National pin drive master rotary bushing

1 Set Foster 79 hydraulic powered d r i l l p ipe tongs, complete.

Electric driven hydraulic unit with Vickers tandem hydraulic pumps.

7

1 Set Byron Jackson Type D B heavyweight rotary tongs, complete with four lug jaws and hinge y-w assembly.

1 Set Byron Jackson 5 " Type M G G center latch d r i l l p ipe elevator, 275 ton rated capacity, with 18° taper.

1 Set Byron Jackson 2>/ A" x 132" weldless elevator l i n k s , 350 ton rated capacity.

I Set Byron Jackson Type winter latch elevators with 7Vf" bore. 125 ton rated capacity for handling 7?4" O D dri l l collars.

1 Set Byron Jackson 1?<" x 72" weldless elevator l i n k s , 150 ton rated capacity fo- handling 73^" dri l l collars.

1 Set Varco # 2550— 5 ^ " to 7 " DCSR d r i l l co l la r s l ips.

2 Sets Varco 5" SDXL d r i l l p ipe s l ips.

1 TurTy rotary d r i l l i n g l ine , l H " diameter x 7500' long.

1 Galvanized plastic core 6 x 7 sand l i ne diameter x 15,000' long.

1 Baash-Ross " C R " 6V$" to 7»f" single screw safety c lamp.

1 Martin-Decker Type * E " d n l l i n g con t ro l , consisting of:

a. AWE-6 weight indicator with E 80 Sensater pressure trans­

former unit for use with National Type E wire line anchor.

b. GM-4-501 compound mud gauge.

c. Z-104A-4T four channel recorder.

d. National Type " E " wire line anchor complete wi th wire line snubber for use with 1 ^ 4 " wire line.

e. H-6A-8 tong torque assembly

1 Ingersoll-Rand Model K4U air ho is t with J500# n n y -'me pull

capacity at 80 psi air pressure Unit mounted on derrick floor for

handling drill pipe. etc.

8

Drilling Pumps and Mud Systems

2 National N-1600, 7 \ i " x 16" d r i f t i n g pump uni ts . Each unit is powered by two E M D Model D-79-DC electric motors. Each pump is equipped with Hydr i i Type K-20-5000 pulsation dampenera. These units are piped with two 6 " schedule 160 5000 # W.O.G. mud discharge lines wi th 6" , 5000# W.O.G. manifold valves. These pumps are controlled from the pump room and the drillers position.

2 Mission 6 x 8-R centr i fugal pumps with 10>^" impellers, powered by 50 HP, 1750 RPM AC electric motors. These pumps are manifolded together and are for mud mixing, desilting and pumping out sumps or preload tanks.

2 Mission 2 x 3-R centr i fugal pumps with \ \ Y i ' impellers, powered by 25 HP, 1750 R P M AC electric motors These pumps are manifolded together and are used for transfer of dr i l l ing water.

3 Lightnin heavy duty mud agi tators M o d d 324-TEQ 15 2 powered by 15 HP. 1750 RPM AC electric motors. These units are installed on the three active mud pits.

1 Lightnin chemical m ixer Model NS-l powered by a 1/3 HP. 1750 R P M AC electric motor. This unit is installed on the chemical tank.

1 Rumba special No . 5-4860-DU dual shale shaker un i t , powered by two, 3 HP, 1750 R P M AC explosion proof electric motors.

1 Swaco size 212 skid mounted desander un i t wi th two size 112

Dotrclones. Equipped with 5 x 6-R Mission centrifugal pump

powered by 40 HP 1750 R P M explosion proof AC motors.

1 K ing 45C c i rcu la t ing head complete wi th K i n g 4AR wire line stripper.

2 Goodall 3 H " * 73' S-10,000 # test ro tary hoses for 6 " schedule 160 stand pipes.

1 Pioneer T16-4 cyclone desilter unit with sixteen 4" clones.

9

Blow-Out Preventers and Associated Equipment •

I Cameron blowout preventer assembly, type 'LT* triple unit. Top unu has I J } , " . 5000 # W.O.G. CIW 6BX (BX 160 ring) clamp connection. Bottom unit has 13H". 5000# W.O.G., (BX160 ring) flanged connection. Each unit has one 2", 5000# W.O.G. and one 4". 5000 # W O G. flanged outlet below each set of rams. Top and bottom units are equipped with 5" drill pipe rams and the middle unit is equipped with blind rams.

1 Cameron # 20444-13 swing bolt clamp assembly.

2 Cameron No. 14256. 4" series 1500. 5000# W.O.G. Type HCR valves.

1 Hydnl No. 42H73-Y special. 14" 5000# W.O.G. blow-out preventer. Top has 13»i". 5000# W O G. (BX 160 ring) flanged connection Bottom has 13*i". 5000# W.O.G. CIW 6BX (BXI60 ring) clamp connection.

1 Regan 2l) .f" Type KF blow-out preventer. The top and bottom of the pieventer are 20" series 600 studded connections.

1 Payne No. 76-10-240-SE 240 gal automatic accumulator unit, consisting of three K0 gal, 3000# W.O.G. non-separator Type S accumulators, one 10-9-46-B pump, one DP-1092-C double plunger pump, and a 250 gal mounted fluid tank. This unit " i seven valve fluid control manifold, consisting of seven 3000fr O.G. 4-way ramlok valves and a Payne Model 2/6) regulator for regulating Hydnl operating pressure

1 Payne A-7-E seven valve air remote control unit consisting of seven , 250# W O G, 4-way air valves and seven double-acting air cylinders mounted tin a 5000# W O G. fluid control valve.

One 4-line choke manifold and fabricated gas separator unit is

installed on derrick floor. This unit also has a 4" circulating line

connected The high pressure Halliburton line and mud stand pipe

manifold is connected to the choke manifold.

10

Two 20-ton capacity blow-out preventer handling units mounted on overhead trolley beams to expedite the installation and removal of biow-out preventer equipment

4 Ingersoll Rand Model HU air hoists with 2000# single line pull capacity at HO psi air pressure. These units are installed on derrick substructure cellar deck to expedite the handling of biow-out pre­venter equipment

Dri l l Pipe, Dri l l Collars and Tools

343 Joints (14.500') 5" OD Spangwcld 19.50# grade E range, 3 seamless internal upset dr i l l pipe with line particle flush type hard-facing, on tool joints. Tool joints arc 6^2" OD x 5" X-hole

14 (602') 7}$" OD x 3" ID x 43" long National replaceable end dr i l l collars with double seal shrink thread 6»j" API regular tool joints. Box end of drill collars have machined recesses to accom­modate elevators and slips and eliminate the need for drill collar clamp an J lift subs. Special set of elevators and elevator b.iils are provided to expedite this drill collar string when making trips Necessary subs for connecting 5" drill pipe and dulling bits to these collars.

1 Bowen 7*i" x 9»i" Series 150 overshot, complete with pack-oft and grapples to fit 5" drill pipe and 7?$'" drill collars.

1 i J i " * <>»," OD x 64" lonp «V tic! -" ,ed tap with * 4 " water course and IF box conneuior..

I TIW type HRLO safety joint with 4 ^ " IF box x 1,4" IF pin connection

I Gray Fig 162 Automatic blow-out preventer with release tool.

Rental Equipment

1 Halliburton cementing unit with two HT400 pumps. Each pump

11

is powered by an HMD Model D-79 DC electric motor. Each pump is equipped with a Kinzbach automatic reset relief valve set @ I2.()00#. One centrifugal mixing pump powered by a 40 horsepower AC electric pump.

I Schlumberger wire line electric logging unit mounted on the derrick floor so that the logging line can be run in the hole without use of alignment sheaves.

I Swaco horizontal mounted degasser unit.

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JENNECO TENNECO CIL EXPLORATK ICIIQul

X O M P A N V ! ... : bhOFFICE COMMUNICATION

CENTRAL GULF P.VISION l n M GLIOBER 15, 1985

F. C. SHEFFIELD

K. W. MART PI DALE

SHALLOW HAZARD REPORT - EUGENE ISLAND BLOCK 172

On September 28, 1983, Tenneco Oil Company contracted Cdom Offshore Sur.--. Inc. of Baton Rouge to conduct a detailed multi-sensor geophysical survey of Eugene Island °lock 172. Instruments used for the survey include a proton precession total-field magnetometer, dual side scan sonar, 24 kHz echosounder, 7.0 kHz profiler, and DFS V high resolution seismic system.

IOC "I" LOCATION

Th. proposed surface location for the TOC "I" well is 620' FSL and 2220' FWL. '..n;s 0004, COO- and 0006 exhibit "acoustically transparent to amorphous" zones which probably epresent nonpressurcd "disseminated pore gas". A rear-surface "acoustically transparent" zone on Line 0005, adjacent to the proposed "I" location, MR? not app ^r .o be connected to the deeper "moderately over-press jred" 'one descnir.'d in Odom's report. However, i t probably does not matter whfih°r or no* {;ht- -wo zones are connected as this deeper zone appears to exis1: over che entire block at a depth of 80 to 100 feet below the seafloor and has been pe-"traced by several wells without incident. Thr 'efore, i t is believe-i this 1 .cation may be drilled safely. This shallov hazard survey and conventional 3-D seismic data have shown no otlier geological or cultural hazards co oe present.

TOC "J" LOCATION

The proposed surface location for the TOC "J" well is 65t FSL and 1500' ,-"WL. Lines 0003 and 0004 exhibit a deeper "moderately overpressured" zone as described in Odom's report and discussed for the TOC "I" location above. It is believed tnat this location may be drilled safely as this shallow hazard survey and conventional 3-D seismic data have shown no other geological hazards to be present.

TO:

FOR:

TROM:

RL

TOC "K" LOCATION

The proposed surface location for the TOC "K" well is 3300' FSL and 2800' FWL. Lines 0006 and 0007 exhibit a deeper "moderately overpressured" zone and gas intrusions as stated in Odom's report and discussed above. A magnetic anomaly corresponding to an abandoned well has been observed on line 0007 500' southeast of the proposed "K" location. This anomaly will be buoyed prior co any construction in this n'cinity. I t is believed that this location inay be drilled safely as this shallow hazard survey and conventional 3-D seismic dat;. have shown no other geological or cultural hazards to be present.

TFNNFP.fl OTt FXPI flRATTON AND PROniTTTON INTEROFFECF COMMUNICATION

( C O M P A N Y )

SHALLOW K/UARD REP'.-..i - r I BLOCK 172 CCTOBER i5 , 1985 Pi iE 2

TOC "L" LOCAfJON

The pr-pose ' surface location fo r the TOC "L" well is 4200' FSL. and 3000' FEL. Lines 0025 and 0102 exhibit a deeper "moderately overpressured" zone and qas intrusions ai described in Odom's report and discussed above. However, crosslines 0024 and 0026 do not appear to ver i fy the presence of this deep gas zone as interpreted by Odom. Two magnetic anomalies, 500' and 850' west of the prr-oosed "L" locat ion correspond, respectively, to an abandonee well and a 14" Transco p ipel ine. These obstructions w i l l be buoyed pr ior to any construction at this locat ion. I t is believed that the proposed "L" well may be safely dr i l led as no olher geological or cul tural hazards are seen on this shallow hazard survey or conventional 3-D seismic.

TOC "M" LOCATION

The proposed surface location for the TOC "M" well is 700' FSL and 1000' FEL. Lines 2029 and 0030 exhibi t possible accumulations of nonpressured "disseminated pore gas" withi . , 25' of the seafloor as described in Odom's report. I t is believed that th i s location may be d r i l l e d , * f e l y as no geological or cul tura l hazards are seen on th is shallow '.azard survey or conventional 3-D seismic.

KWM/css

cc: 6. K. Maloney

L T K N M l - * 11/11

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Tenneco Oi l Ct .

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PUBLIC INFORMATION PLAT

Prepared By« John E. Chonat a Associates , Inc.

TENNECO OIL COMPANY

SUPPLEMENTAL PLAN OF EXPLORATION PROPOSED LOCATION

EUGENE ISLANO AREA

SC** _ l"« 2 0 0 0 ' I O / ? 3 / 3 5

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STATE CF LOUISIANA

SITE OF BLOCK 172

16 1 Y * 413.88*

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Tifnneco O i l Co.

OCS ~G - 5494

BLK. !72

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MASTER S H E E T sooo • 0 0 0 FT

S C A L E

PROPOSED MINERAL OEVELOPMENT EUGENE ISLAND AREA G U L F OF M E X I C O

APPLICATION BY JANUARY 16 , 1984

TENNECO OIL COMPANY L V 4YETTE , LA.

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{jUA-ltCO On'' Co )\ — * \

TENNFCO on. co~\

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I^y. F^_J)JL_CO. INTRACOASTAL CITY

r A P i i I T V

Tenneco Oil Exploration and Production

The Well Information Attachment, the Structure Map, the Schematic

Cross Sections, and the Plan of Exploration Plat (with bottom hole

locations) are considered proprietary data to be exempt from disclosure

under the Freedom of Information Act and should therefore not be made

available to the public or provided to any affected state or to the

executive of any local government. In th is respect, proprietary data

have been removed from a l l but f i ve (5) copies of the Plan of Exploration

Suppl ient.

AIR QUALITY CALCULATIONS TENNECO OIL COMPANY

EXPLORATION (SUPPLEMENT)

EUGENE ISLAND AREA

BLOCK 172, WELLS I-M

Air qua l i t y c a l c u l a t i o n s are based upon the d r i l l i n g of f i v e exp lora tory wel ls . Operations are scheduled to begin on or about November 27, 1985 and to requi re approximately 240 days of t rouble f ree d r i l l i n g . During t h i s period the d r i l l r i g is expected to have an average d a i l y f u e l consumption of 1,500 g a l l o n s . De ta i l s of the c a l c u l a t i o n s are presented in Tables 1-3. A l l p r o j e c t e d emissions are below the maximums and t h i s operat ion i s therefore exempt.

TABLE !

PROJECTED AIR EMISSION WELLS I-M BLOCK Eugsne Island 172

TAKEOFF FUEL CON-RUNNING & LAND- STrfPTION

EMISSION SOURCE TIME/DAY INCS/DAY GALS/DAY EMISSION FACTORS POUND/1,000 GALS.

EMISSION FACTORS AIRCRAFT TAKEOFF & LANDINGS

PROJECTED EMISSION 1-DAY PROJECTION IN if

DRILLING RIG 24 h r s

CARGO BOAT 2 h r s

(IN BERTH)

CREW BOAT 2 n r 8

(IN BERTH)

HELICOPTER TAKE­OFF & LMDWCS

1500

4

S02 NO, CO TSP VOC S02 NO, CO TSP VOC SO2 NO, CO TSP VOC

31.2 469

31.2 469

102 33.5 37.5

102 33.5 37.5

31.2 469 102 33.5 37.5

. 18 .57 5.7 .25

46.8

0.1

0.1

.52 0.7

1-DAY TOTAL

704 ] CT

1.9 0.4

1.9 0.4

2.3 23

50.3 56.3

0.1 0.2

0.1 0.2

1.0 2.0

47.7 710 177 51.5 58.7

Projected emissions are based on data from "Compilation of Air Pollutant Emission Factors", 1rA Edition AP-42, EPA, 1977. Table 3.3.3.-1 and Table 3.2.1.-3.

ABOVE NUMBERS IN POUNDS

TABLE 2

AREA Eugene Island BLOCK 172 WELLS I-M

PROJECTED EMISSIONS FROM EACH SOURCE

BY AIR POLLUTANT FOR 1985/86 TeoT

DRILLING OPERATIONS - WELLS

SOURCE AIR POLLUTANT (T/YR) ' SOURCE NOx TO rsp VOC

Dr i l l ing Rig Projected Emissions ID/day 46.8 704 153 50.3 56.3

Transportation-Cargo Boat/ Crew Boat/ & HelicoDter lb/day

0.9 6.1 23.8 1.2 2.4

SUB-TOTAL lb/day 47.7 710 177 51.5 58.7

Miscellaneous 25% of Sub-Total

11.9 178 44.3 12.9 14.7

TOTAL in lb/day 59.6 888 221 64.4 73.4

•

TOTAL in Tons/year 7.2 107 26.5 7.7 8.8

.

TABLE 3

AREA Eugene Island BLOCK 172 WELLS I-M

EXEMPTION CALCULATIONS

E = 3400 ( D 2 / 3 )

E = 33.3 D

for carbon monoxide

for sulfur dioxide, nitrogen oxides, total suspended particulates, and volatile organic compounds

D = 37

E = 37,748

E = 1.232

Statute Miles

CO

SO 2 , NOx, TSP, and VOC

1986 HIGHEST YEAR

POLLUTANTS "E" ( T / Y R . )

PROJECTED EMISSIONS ( T / Y r . )

EXEMPT

S 0 2

1232 7.2 yes

NOx 1232 107 yes

CO 37748 26.5 yes

TSP 1232 7.7 yes

,VOC 1232 8.8 yes

E = Tlie emission exemption amount expressed in tons per year.

D = Tho distance of the facility from the closest onshore area of a state expressed in statute miles.

ram

REPORTING 9 OIL SPILLS OR SPILLS OF HAZARL' # MATERIALS

OCS LEASES

Th'* fo l lowing governmental agencies w i l l be n o t i f i e d depending on the amount s p i l l e d : (ALL SPILLS WILL BE REPORTED)

LESS

OVER

THAN 6.2 BARRELS: U.S. Coast Guard immediately, M.M.S. orally within twelve (12) hours and orally the Louisiana Department of Conservation i f spill endangers the ccast line. Confirm oral reports in writing on spill report form.

6.3 BARRELS: U.S. Coast Guard, M.M.S. Oi l immediately and o r a l l y . Orr. Louisiana Department of Cons Commission. Conf i rm a l l ora l

nd Gas Supervisor, M.M.S. D i s t r i c t Suoervisor • to the FPA Regional Admin is t ra to r , • . t i o n , f,p. \ Louisiana Stream Control reports in w r i t i n g on s p i l l repor t form.

A l l s p i l l s shal l be reported to the U.S Coast Guard immediately. S o i l l s less than 6.3 ba r re l s sha l l be reported to the appropr iate M.M.S. D i s t r i c t O f f i c e in the f o l l o w i n g manner:

I f the s p i l l occurs during the day l i gh t hour- of 7:00 A.M. throuuh 5:00 P.M. Monday through Sunday, c a l l then- •: " f i ce and reoort s p i l l to the rac io ooe ra to r . I f the s p i l l occui •_• at n i g h t , report s p i l l the fo l low ing day.

I f the s p i l l is 6.3 o r more b a r r l e s , n o t i f y the appropr iate D i s t r i c t Supervisor immediately. Their answering serv ice w i l l give you t h e i r numoer.

The information requ i red by the governmental agencies i s :

Location of s p i l l , date and time s p i l l occurred, amount and type material l o s t , cause of inc ident and cor rec t " ! " a * c * : o n taken, size of s l i c k , c o l o r a t i o n , d i r e c t i o n of movement " cli t i ons.

I f s p i l l is a d i r e c t r e s u l t of a load-out i n c i d e n t , u<«. uacntional in format ion wi 11 be requi red:

Name of Capta in , h is home address and telephone number, 2 Card Name, ca l l sign and agent .

Chemical dispersents w i l l not be used on s p i l l p r i o r to obtain ing approval f rom the appropriate governmental agencies.

The government agency ass is tan t w i l l repor t a l l s p i l l s of a minor nature ( l e s s than 6.3 b a r r e l s ) dur ing working hours. Our In t racoasta l C i ty f a c i l i t y w i l l repor t minor s p i l l s ("-ns than 3 ba r re l s ) to the M.M.3. on weekends and h o l i d a y s . The prod. ion manager opera t ions , or in nis absence, the government agency ass is t . , w i l l r epo r t a l l s p i l l s invo lv ing 6.3 or more b a r r e l s .

ALERT PROCEDURE

This A l e r t Procedure w i l l become e f f e c t i v e immediate ly upon the observance of an o i l o r hazardous mater ia l s p i l l from a company i n s t a l l a t i o n of any kind which cou"d possib ly p o l l u t e s h o r e l i n e s , coas ta l or in land wa te rs , c r the open sea, or which could damage, fou l or endanger any proper ty or w i l d ­l i f e onshore or o f f sho re .

INTERNAL ALERT PROCEDURE: !

(1) Any Comoany employee observ ing an o i l or hazardous mater ia l s p i l l o f any q u a n t i t y must. i rrr : i a t e l y n o t i f y h is supe rv i so r (MANDATORY NOTIFICATION).

(2) The superv isor w i l l con f i rm the s p i l l , i t s cause and basic na tu re , and n o t i f y the area engineer responsib le f o r the area concerned. A l l o f the i n fo rma t i on requi red on the ''Report of O i l o r Hazardous M a t e r i a l " i s to be prov ided (MANDATORY NOTIFICATION).

(3) The area engineer w i l l make a p re l im ina ry de te rm ina t i on o f the seriousness o f the s p i l l and n o t i f y the d i v i s i o n p roduc t i on super in tendent , and the p roduc t ion manager opera t i ons . The area engineer w i l l make an in fo rmat ion repo r t to h is superv isor .

(4) The p roduc t ion manager ope ra t i ons , and i n h is absence the d i v i s i o n product ion super in tendent , w i l l assess the ser iousness of the s p i l l and i f the s i t u a t i o n requires i t , he w i l l n o t i f y the d i v i s i o n procuct ion manager and appropr ia te members o f the cont ingency task f o r c e . Ca l l i ng the cont ingency task force i n t o operat ion i s under.-the a u t h o r i t y of the p roduc t ion manager operat ions and in h i s absence the rr ' . i s i o n product ion super in tendent .

S i tuat ions requ i a c t i v a t i o n o f the cont ingency task force are to be reported to the ton o f f i c e by the person a c t i v a t i n g the cont ingency task, force and p r o v i d i . a t l eas t the s p i l l , r e p o r t i n f o r m a t i o n .

EXTERNAL ALERT PROCEDURE:

The respons ib i l i t y for the not i f ica t ion of an o i l or hazardous material s p i l l rests with any company employee observing a s p i l l . The employee must immediately not i fy his supervisor who wi l l follow the procedures in th is manua". tc not i fy the appr^jriate governmental agencies (MANDATORY NOTIFICATION).

Any person othe i :han an employee ( v i s i t o r , c o n t r a c t o r personne l , or t h i r d party) must immediately n o t i f y a ccmpany r e p r e s e n t a t i v e . The employee w i l l then use the External A l e r t Proceoure (MANDATORY NOTIFICATION).

Procedures de f ined in the f o l l o w i n g memorandums are to be fo l lowed in r e p o r t i n g s p i l l s .

EQUIPMENT

Tenneco Oil Company is a member of Clean Gulf Associates and w i l l ca l l upon them in the event of a s p i l l . Also, we are a member of the Offshore Operator's Committee. This Committee maintains an inventory of member com­p l i e s ' equipment that is available for use by other members.

"lean Gulf Associates has a major base at Grand I s l e , Louisiana, with a sub * i at Intracoastal C i t y , Louisiana.

A i l procedures and equipment are designed to be in compliance wi t 1 OCS ORDER NO. 7 (Pol lu t ion and Waste Control) . Equipment to be used would mainly include the fo l lowing:

I . Fas.w Response, r v id-Mounted, Skimmer System

A. Nearest Location - Intracoastal C i ty , Louisiana B. Response Time - 2 hours loadout, 8 hrs. t ravel = IO hours C. Personnel Required - 4 men per s h i f t

i l . Barge-Mounted, Hign Volume, Op- Tea Skimmer System

A. Nearest Location - Grand I s l e , Louisiana B. Response Time - 2 hours loadout, IO hrs. t ravel = IZ hours C. Personnel Required - 13 men per s h i f t

I I I . Helicopter Spray System

A. Nearest Location - Intracoastal C i t y , Louisiana B. Response Time - 1 hour loadout, I hrs. travel = 2 hours C. Personnel Required - 2 men per s h i f t

OCS-4-5494 WELLS I - M DRILLING MUD COMPONENTS

L. The su r face hole w i l l be d r i l l e d w i t h a f r e s h wa te r -Mi lge l - caus t i c soda mud. Products used inc lude :

TRADE NAME GENERIC NAME

M i l g e l Caustic Soda Uni -Ca l Drispac

Wyoming Bentonite NaOH Lignosui fona te Carboxymethyl Cel lulose

2. A s eava t e r - l i gnosu l f onate mud v i l l be used to d r i l l belov casing. Depending on hole cond i t ions , products may inc lude :

surface

TRADE NAME GENERIC NAME

M i l g e l Caust ic Soda Uni -Ca l L igco M i l - B a r Drispac So l t ex M i l - D l u g Aluminum Stearate Soda Ash Lime Caustic Potash Shale Trol Desco LD-8

Kwik-Seal

Bicarb of Soda Tenneco Mud Lube

Mil-Temp

Wyoming Bentoni'e NaOH I- ignosulfonate Western Lignite Barite Carboxymethyl Cellulose Sulfonated Asphaltic Residuum Walnut Hulls Aluminum Stearate Na?C0 CatOHT KOH Organo Complexed Aluminum Salt Sulphur Methylated Quebracho Dispersion of fatty acid salt i n an alkoxylated alcohol Mixture of granular, flake, and fiberous materials (for loss of circulation) NaHCO Chlor ina ted p a r a f i n , su lphur ized animal f a t and o l e f i n s Sodium s a l t of Styrene-Maleic Anhydride Copolymer

NOTE: Clean Spot ( to be used i n cases of stuck pipe) mineral o i l base spot t in r f l u i d v i t h sur fac tants