In Reply Refer Tot F0-*>1 December 9* 1966

Anadarko petroleum Corporation Attention, Hr, Ronald A. Bain 16601 Greenspoint Park Drive Houston * Texas 77060

Gentlesen:

Heferenoe i s aade to your 3uppleiaental Plan of Exploration and accompanying infomation received November 15, 19&69 amended December 6. 1966, for J^ose OCS-G 6660. Blook 376, Bast Car.eron Area. This plan includes the act ivit ies proposed for Viell B.

In accordance with 30 CFR 250.33(e), tnis plan is hereby deeined submitted and is now being considers for approval.

Your plan gofljt£oJ VW&SL and should be roferenced in your coranuni-cat ion and correspondence concerning this plan.

Sincerely yours,

(Orig. Sgd.) A. Donald Giroir D. J . Bourgeois Regional Supervisor Field Operations

UWilliamsomcck: 12/07/88:poecom

Office of Program Services

DEC 12 1988 **»rt»tkm Services

o9GUQtt n„

* A N A D A R K O P E T R O L E U M C O R P O R A T I O N leeoi GREENSPOINT PARK P R I V I * ROUSTON. TEXAS 77oeo • ? i3vs?S^i i l i

December 1, 1988

Minerals Management Service 1201 Elmwood Park Blvd. New Orleans, La. 70123-2394 Attn: Mr. Warren Williamson

RE: Supplemental POE East Cameron Block 378 OCS-G-6660

As per your telephone request, shown below is the daily and t o t a l discharge rates for the proposed well:

150 bbls. daily 20,000 bbls. t o t a l

Enclosed for your review i s a copy of our mud components l i s t .

Should you require any additional data prior to approving this supplemental POE request /.-please contact the undersigned at (713) 875-0858.

Very t r u l y yours,

Paul LankforcN Coordinator of Regulatory Affairs and Safety

PFL/ncl Enclosure

f • COMPARABLE MUD PRODUCTS BY TRADENAMES

IMCO Description SERVICES Baroid Magcobar Mllcham Primary Application

WEIGHTING AGENTS ANO VISCOSIFIERS IMCO BAR Barn id Magcobar Mil-Bar Fur increasing mud weight up tu

20ppg,

Caelum Carnonate IMCO WATE Lo-Waie W.O. JO Fur increasing weight of oil muds W.O. 30 uptolOBppg.

IMCO GEL Auuagtl Magcogel Milgel . Viscosity and filtration control ui water base mud*.

^urtwBcmnnitf IMCO KLAY Baroco High Yield Green Sand For uat when larger panicle tue is Blended Clay Clay desired for viscosity and nitration

control

Aoamuaitc IMCO BR IN EGEL Zeogci.. Salt Gel Salt Water Gel Viscosifier in Mil water muds.

Acmei rated IM CO H Y B Qu*ck«Gci K wie-Thik anenionue

Super-Col Quick viscosity tn (reth water upper holt muds with minimum chemical treatment.

AMSWAICH Fibers IMCO BEST Renal Floaal Floaal Viscosifier for fresh or salt water muds.

iii\ Produced IMCO XC XC Polymer Duovis XC Polymer Viscosifier and fluid loss control additive P-imnntf for tow solids muds.

OISPERSANTS c . « i u m IMCO PHOS Barafos Magco-Phos Oil Fes Thinner for low pH fresh water muds.

Tesraonoiphatc

S..<jmm Acid .. SAPP SAPP SAPP SAPP For treating cement contamination. P*vropni»ahBtt

Ossmracno IMCOQBT Tanne? M-C Quebracho ..Tanco Thinner for fresh water and lime C nmniHind muds.

-mu<k Extract IMCO FLO Ravflo

DESCO Desco Desco

, Rayllo Thinner for fresh water muds and in muds containing salt 110.000 to 13.000 ppm).

Desco Thinner for fresh and salt water muds alkalized for pH control.

U i f r t tjgmte IMCO L1G Carbonox Tann A Thin Ligcn DtsoenanL emulsifier and supplemeo> iary additive for fluid loss control.

•cwd I .i?nuc IMCO TH IN CC-16 Caustiiig Ligcon IV» ratio caustic-lignite dispersant. emulsifier and supplemenury I'luid lossaddurve.

C-»num IMCO CAL K cm break Thinner for SCR and lime muds. L^gawwullonaie

w ^ i f i c d IMCO VC-10 L-ipn«MMiiitinatc

.Q-Broxin .Spersene UnnCai Dispersant and fluid lou control additive for water base muds.

I tgnmul- IMCO RD-111 Blended multipurpose dispersant. fluid lou fwMsatc Compound agent and inhibitor for IMCO RD-111 mud

systems.

FLUID LOSS REDUCERS P esfKSMMM/cd IMCO LOID Imocrmex My-LiwJcl MiUiarch Sassfca

Controls fluid loss in saturated alt water, lime and SCR muds.

<M*iura Carhotv- IMCO CMC Ccllea Magco CMC '. Milchcm CMC For fluid loss control and barttc tnvl CcUulma '(Regular) (Regular) (Regular) (Mcd-Vu) suspension in water base muds.

s.«diUm Carhoxv. IMCO CMC Cellex Magco-CMC Milchcm CMC For fluid lou control and viscosity building iisvnn\iCcilulir« (Hi-Vtsl (Hi-Vis) (HI-VIS) (Hi-V») in low solids muds.

vxi iam Carnosv- — . - . .IMCO CMC Ccllea Magco CMC Milchcm CMC For fluid lots control in gyp. sea water and !rarta%tCi.-lluio*e (TechGrade) (TechGrade) (TechGrade* iTechGrade) fra»* "aterfluids.

Ham.".,. Cellulate . . . DRISPAC Drispac Drispac .. f . . . Di-unac Fluid loss control additive and viscosifier .«h«r in salt muds.

&ytatf

.CYPAN Cypun

.WL-100 WI.-I00 WL-100 WI.-I00

Cypan l . . . . Cypan Fluid loss control in calcium-tree low solids and non^duperted muds.

. Fluid loss control in cakiuriHree low solids and non-dispersed muds. ^

COMPARABLE MUD PRODUCTS BY TRADENAMES — Continued

Description IMCO SERVICES Baroid Magcobar Mllchem Primary Application

LUBRICANTS, DETERGENTS, EMULSIFIERS Extreme Pressure I M C O - E P

Lubncant LUBE .SOLTEX Processed

Hydrocarbons Water Dtspmibss IMCO Asphalts HOLECOAT

. EP Mud Lube tie Lube Lubn-FUm Used in water base muds to impart extra-pressure lubricity.

.Soltex Soltex Soltex Used in water base muds tc lower down-hose fluid loss and rmr oc heaving shale.

.STABIL- ITI-WD Lubncant and fluid loss reducer for water HOLE base muds that ccntatn no dieael or crude oil.

Oil Dtspersibk IMCO Baroid • • Pave-A-Hott Carbo-ScaJ Lubncant and fluid loss reducer for water Asphalts MUD OIL Asp hah base fluids that conuun dstsel or crude oil.

Oil Soluble.. Surfactants

IMCO Skot-Free Pipe Lax Pctrocote FREEPIPE

. Non-weighted flusd for spotting to free differentially stuck pipe.

Deiergcm IMCOMD Con Oct D-D Milchcm MD Used in water base muds to aid in dropping sand. Emulsifies oil, reduces torque and -minimizes bit-bailing.

Non-loruc Eraubifier DME Aktaflo-E SurFsk-E DME Emulsifier for surfactant muds.

Blend of Anionic IMCO SWS. Surfactants

.Trimulso Saline* .AtlosolA Emulsifier for salt and fresh water muov Atlosol S

An Onjanic Entity IMCO TorqTrim DOS-3 Mil-Plata 2 Supplies the lubricating properties of oils Neutralized with Amines LUBRIKXEEN without environmental pollution.

i t t y -5.A

IMCO SPOT. Sulfonates. A Asphaluc Materials

.SF 100 Invert emulsion which may be weighted to desired density for spotting to-frae differentially stuck pipe.

DEFOAMERS, FLOCCULANTS, BACTERICIDES Aluminum Stearate

. Aluminum Stearate

. Aluminum Stearate

.Aluminum Stearate

.Aluminum Stearate

. Defoamer for lignosulfonate muds.

Sodium Alkyl Aryl IMCO DEFOAM -Sulfonate

Magconol Defoamer for salt saturated muds. Defoamer

Surface Active IMCO '»V300 LD-7 All purpose defoamer. Dispersible Liquid FOAM BAN W30u Defoamer. •...

Rocculating Agent IMCO FLOC Bamfloc Floait Scparan Used to drop drilled solids where dear water is desirable for a drilling fluid.

Paraformaldehyde IMCO Aldactde My-Lo-Jel Preservative Prevents starch from fermenting when used PRESERVALOID Preservative m muds of less than saturation or alkalinity

less than 1.0 cc

LOST CIRCULATION MATERIALS Fibrous Material IMCO FYBER Fibenex Mud Fiber Mil-Fiber Filler as well at matting material.

Fibrous Mineral I MCO WOOL Magco Wool Mil-Wool Often used in areas where acids are later Wool employed to destroy the material.

Mil-Plug Most often used to prevent lost circulation.

Walnut Shells:

Fine ' IMCO PLUG Wall-Nut Nut-PI ^ .

Medium I MCO PLUG Wall-Nut Nut-Plug Mil-Plug Used in conjunction with fibers or flakes to regain lost circulation.

Coarse IMCO PLUG Wall-Nut Nut-Plug Mil-Plug Used where large crevices or iractures are encountered.

Ground Mica:

Fine IMCOMYCA Mica tax Magco-Mica Milmica Used for prevention of lost circulation.

Coarse IMCO MYCA Mica tea Maaco-Msca Milmica Forms a good mat at face of well bore.

Cellophane IMCO FLAKES Jel Flake Cell-O-Seai Milflake Used to regain lost circulation. i

Combination nf IMCO iwia-Seal Kink-Seal Rank-Seal Used wheie large crevices or iractures t granules, flakes. KWIK SEAL encountered, and fibrous ma­terials of various . sires in one sack.

Blended high fluid DIASEAL M loss soft plugging material.

M .DiaaaalM I M One sack mixture lor preparing toft plugs for severe lust circulation.

t o n

• gas

COMPARABLE MU. PRODUCTS BY TRADENA ES — Continued

IMCO Description SERVICES Baroid Magcobar Milchcm Primary Application

SPECIALTY PRODUCTS '.hale Control IMCO SCR T-8 CaJiroi Calcium chloride mud for inhibiting the Reagent swelling of benionithc shakes.

Bentonite Extender IMCOGELEX Bene* Bene* Bcnex Increases yield of bentonite to form very low solids dnllmg fluid.

Non-Ionic Surfactant OMS AktafloS SurFak-M DMS Pnmary surfactant for formulating surfactant muds. May be used in hot holes for viscosity liability.

Filming-Aminc IMCO PT-102 Coat-ClIlS Magco Inhibitor . . Ami-Tea Corrosion inhibitor. Coat-sIS Nob

Shale Inhibitor Duunmomum Diammomum Diammonium Diammomum For use in specially prepared DAP muds. Phosphate Phosphate Phosphate Phosphate

Specially Blended IMCOSULF-X Mil-Guard For use as a hydrogen sulfide scavenger in Zinc Compounds water oase muds

COMMERCIAL CHEMICALS Sodium Sodium Sodium Sodium Sodium Used in water base muds to prevent high Chromate Chromate Chromate Chromate Chromate temperature geiauon and as a corrosion

inhibi tor

Sodium H 'droxide Caustic Soda Caustic Soda Caustic Soda Caustic Soda For pH control in water hase muds.

Sodiums. »nate Soda Ash Soda Ash Soda Ash Soda Ash For treating out cakium sulfate :n low pH muds.

Sodium Bicarbonate Sodium Sodium Sodium Sodium For treating out calcium sulfate or cement Bicarbonate Bicarbonate Bicarbonate Bicarbonate in high pH muds.

Banum Carbonate Banum Anhydrox Banum Banum For treating out calcium sulfate (pH should Carbonate Carbonate Carbonate be above 10 for best results i.

Calcium Sulfate Gypsum-. Gypsum Gypsum Gypsum Source of casaum for formulating gyp muds.

.alcium Hydroxide Lime Lime Lime Lime Source of calcium for lormuiating lime muds.

Sodium Chloride Salt Salt Salt Salt For saturated salt muds and resistivity control.

Chrome Alum Chrome Alum Chrome Alum Chrome Alum Chrome Alum For use in cross-linking (chromic chlonde) XC Polymer systems

OIL BASE AND INVERT EMULSION SYSTEMS Invert Emulsion IMCOKENOL-S Invermul Vcnoil Carbo-Tec Drilling fluids used where extremely high System and temperatures arc encountered also a

I MCO K.EN-X dnllmg, completion or workover fluid applicable where only oil contact with formations is desired.

Low Cost Invert IMCO OIL-X LoCOM Inexpensive invert used where low density Emulsion System muds are used and low temperatures i T

encountered.

•Oil Base Mud IMCO REN- Oilfaxe For dniling water sensitive formations. SUPREME

Geiaunous IMCO KEN-PAR SF-100 A time setting gelatinous oil pack for casing Oil Bsuc Fluid recovery and corrosion control.

OIL MUD ADDITIVES Pnmary Emulsifier IMCO KENOL-SfD) Invermul Venoil Carbo-Tect D) Pnmary additives to form stable waternn-

and and oil emulsion. IMCO KEN-X Cone *I(L) Carbo-TedL)

Viscosifier and IMCO K f - Gel-Tone VG-o9 Carbo-Gel Provides viscosity, weight suspension, and Gelling Agent and and filtration control.

I M C onc»2 Petro-Tone

High Temperature IMCO Duratone HT DV-22and Improves emulsion under high temperature Stabilizer Cone... DV-33 Conditions.

Stabilise* Borehole I MCO V R Stabilizes running shale, improves emulsion. Conditions weight suspension, and fluid loss under

high temperature conditions.

Dispersant.. IMCO KEN- OMC and Venhin and Dispersant for reducing rheologtcal THIN Dnltrcat , SE-II properties.

Calcium Oxide IMCO KENOX Calcium source for saponification

-awct u m IUM *rO>i B*K. let • 183

COMPARABLE M 1 PRODUCTS BY TRADEN MES — Continued

Description IMCO SERVICES Baroid Magcobar Mllcham

OIL MUD ADDITIVES — Continued

Primary Application

Fat i \ 4eid IMCO KEN- Oilfa/e Pnmarv emulsifier and stabilizer lor oil-E m u i M i i e r S U P R E M E m * * * H * « *

Cone. A

Emulsion IMCO KEN- DC-55 Imparts gels, contributes to VISCUMI* for Sta&ih/cr SUPREME * « ' f M suspension, and provides filtration

Cone. B control

Speeificallv Modified. Saponified Fatty Acid Chemical*

IMCO KEN- SF-100 PAK

.Gelling agent for formulating high gellation casing pacts.

F.netv Divided I M C O K E N -Siiicaie T H E R M

Contributes to thuotropic properties and reduce> thermal conduct iv it v in Hi-Temp Ken-Pah

NOTES

184

A N A D A R K O P E T R O L E U M C O R P O R A T I O N I 6 B O ! GREEf -.POINT PARK DRIVE • HOUSTON. TEXAS 7 7 0 0 0

R O N A L D A B A I N

O I V I 5 I O N t « H O » » T I O N H A N t C I *

November 3, 1988

Mr. Don Solanas Minerals Management Service 1201 Elmwood Park Blvd. New Orleans, LA 70123-2394

Re: Supplement to Plan of Exploration OCS-G 6660 Block 378 East Cameron, Louisiana

Gentlement

We wish to supplement the o r i g i n a l Plan o r Exploration for East Cameron 37 8, OCS-G 6660 submitted i n February 1985, by adding a "B" surface location for a second w e l l . The proposed surface location i s 17001

FSL, 3250' FEL of East Cameron Block 377 and the proposed bottomhole location i s 9900' FSL, 35501 FWL of East Cameron Block 378.

Enclosed i n thi s supplement are the following:

1. A Shallow Hazards Assessment for East Cameron Block 37 8.

2. A Site-Specific Assessment of the proposed "B" location.

3. A Bathymetry map of the proposed 1B" location area.

4. A table l i s t i n g surface location and intercept point location at each objective l e v e l .

5. Plats of the objective levels showing surface location and intercept point at each objective.

6. A set of a i r q u a l i t y calculations f o r the proposed we l l .

SUPPLEMENT TO PLAN OP EXPLORATION OCS-6 6660 BLOCK 378 EAST CAMERON# LOUISIANA

A l l o ther p a r t s of the Plan of E x p l o r a t i o n not s p e c i f i c a l l y covered by t h i s supplement remain the same.

The proposed spud date o f t h i s w e l l i s December 1 , 1988. We apologize f o r any inconvenience.

Very t r u l y yours .

ANADARKO PETROLEUM CORPORATION

Ronald A. Bain Division Exploration Manager Offshore/Houston Division

RK:jg Enclosures

SHALLOW HAZARDS ASSESSMENT

EAST CAMERON BLOCK 37 8

In September 1984 Odom Offshore Surveys, Inc., performed a geophysical survey centered over East Cameron 37 8. The survey included sidescan sonar, magnetometer, acoustic p r o f i l e r and analog near trace records.

Bathymetry information centered around East Cameron 37 8 indicates water depths ranging from 385' i n the North to 490* i n the South. The water bottom slopes generally to the South w i t h a slope of 0.57% to 0.62% i n the North, center, and West portions? and with a slope of 0.75% to 1.57% i n the East and Southeast portions of the block. Sidescan sonar data indicated rough overconsolidated sediments on the seafloor i n the far northern part of the block, 2 probable f o s s i l reefs (one i n the SE corner of Block 37 8 and one i n the NW corner of Block 26), and nonactive (no gas plume i n the water column) gas vents, ranging from 10' to 60' feet i n diameter. The remainder of the seafloor appears to be medium textured.

No magnetic anomalies were recorded i n the survey area. The analog data did indicate a series of east-west running down-to-the-south faults i n the southern portion of the 37 8 survey area. Also, the analog data indicates a series of one-line amplitude anomalies i n the southern po r t i o n of the survey areas. The depth of these anomalies (possible overpressured gas) range from 0.176 to 0.320 seconds.

ANADARKO PETROLEUM CORPORATION

Robert F. Talley O Division Geophysicist Offshore/Houston Division

RFT 10/13/88

SITE SPECIFIC SHALLOW HAZARDS ASSESSMENT

EAST CAMERON BLOCK 378 #2

(SURFACE HOLE LOCATIONS 1700' FSL AND 3250' FEL ON EAST CAMERON 377)

The shallow hazards survey report and data indicate that the East Cameron 37 8 #2 location i s a good location with the proper safeguards. The well l o c a t i o n is located i n the southeastern portion of East Cameron 377 due to the fairway which runs over most of East Cameron 37 8. The surface hole location, 1700' FSL and 32501 FEL on east Cameron 377, i s clear of a l l manmade and i d e n t i f i a b l e geologic hazards. There i s no shallow gas anomaly, magnetic anomaly, surface f a u l t i n g , gas pockmark, or paleo reef at the surface hole location. The well i s designed to be kicked to the northeast i n t o Block 37 8 and is located i n 471' of water.

Two possible d r i l l i n g hazards are located near the well path. The f i r s t i s a shallow gas amplitude which i s located about 17 00' from the surface hole location and at a depth of 0.310 to 0.317 msec 750'-800") below the seafloor

Therefore, the well bore w i l l be underneath the shallow gas anomaly snd should safely miss i t . The other possible d r i l l i n g hazard i s a down-to-the-south normal f a u l t that dies to the West. The edge of this f a u l t could possibly be crossed by the wellbore i n the

v e r t i c a l section.

Odom recommends that Hsurface casing should be set far enough below the f a u l t zone to ensure a good casing set" =md that " t h i s is a precaution t o ensure that f l u i d exchange does not c cur between the f a u l t zone and w e l l bore." Current plans are for conductor pipe to be set

I n addition, f i v e lines were d i g i t a l l y processed through migration for the well l o c a t i o n . A l l f i v e lines show the surface hole location and the projected w e l l bore to be clear of any i d e n t i f i a b l e shallow hazards (including f a u l t s and shallow gas anomalies) above 3000'. Line 004 shows a possible shallow gas anomaly at 1.12 sec. (approximately 3480 1) which should be s l i g h t l y below the well path. Lines 004 and 102 also show a possible gas anomaly at 1.25 sec. (397 0*) which should be close to the w e l l path. Neither the 3480' or the 3970' bright spots are noted i n the Odom Shallow Survey Report.

ANADARKO PETROLEUM CORPORATION

Robert F. Talley / Division Geophysicist Offshore/Houston Division

RFT 10/13/88

EAST CAMERON BLOCK 378

Level

Ang B/Hy B?)l

Surface Location

17001 FSL; 3250' FEL East Cameron 379

Intercept Coordinates

5300' FSL, 150' FEL East Cameron 377

Lentic 69001 FSL, 1350' FWL East Cameron 37 8

Ev. 377 Pay Sd 8650' FSL, 27001 FWL East Cameron 37 8

TOTAL DEPTH 9900' FSL, 3550' FWL East Cameron 37 8

11/01/88

^ 6 4 ^ i 362

377 \ X« 1,569. 348.288'

245,0 79.968' Lot. 29* 20' 0.965" Long.92° 41 14.462

378/ X* 1,5 75,927 312' T » 2 4 5,079 960' Lot. 2 9 ° 20* i 82»" Lon*»2° 99*91.103

373

ANADARKO OCS-G-6660

WELL NO 2 PROPOSEO BHL

O 9 , 9 0 0 ' FSL 3 ,550 ' FWL X «1,572,096 288 Y • 256 ,260 O'r, Lot 29° 21 • » • • . ! Long 9 2 ° 40 * J 4 3 "

CENTER POINT 7379.024' FNL 3689.512' FEL X« 1.572,2 ST. 6" r* 252,456 992' Lot. 29° 21 14. 443" Long. 92° 40* 33.760'

. Nw "K'POSEO I OCATION

1,700' FSL 3.250' FEL " * 1,565,296 286"

258.136 i 16' LOI 29 6 22' 9 830 i.oii0.92 s 41* 52 933

25

X* 1,368,3-n 288 Tt 253.838.016* Lot. 29* 22' 2 7.060" Lon«. 42* 41* 16 433"

• *\":LL NO I ACTUAL 8 0 * T O M MOLE LOCATION 12.162' FNL 3,0<0' FEL

X« 1,570,88/ ' Y i 257,242" .o t 29 ° l i ' i 634" Long.92 0 4C' 4 9 6 5 8 '

7.379.024'

Xv 1,575,927. J l* Tt 259.838.016' LOI. 2 9 ° 22* 27.916' Loofl. 92° 39' 33.04 '

\

•WELL NO I ACTUAL SURFACE LOCATION 6 420 >-"Nl

6 9 3 ' FWL * • 1,576,620' r« 2 5 1 , 3 0 0 cJt 29 ° 2 l ' 5 45? Long 9 2 ° 39'44 u9

\

\ \

\

26

m Petrolaum Corporation

EAST CAMERON BLOCK 378 OCS LOUISIANA

LOCATION PLAT

SCALE l " « 2 0 0 0 ' HOUSTON .TEXAS