2 9 1985 - Bureau of Safety and Environmental EnforcementIn acc

In Reply Refer RP-2-1

APR 2 9 1985 Conoco Inc. A t t e n t i o n : Mr . D. L. Byers Post O f f i c e Box 51266 l a f a y e t t e , Lou is iana 705Ci

Gentlenen:

Reference i s made t o your I n i t i a l Plan o f E x p l o r a t i o n r vce l ved A p r i l t

fo r Lease X S - G 7132, Block A - 7 5 , South Pad^e I s l a n d A.-ec. This p^an the a c t i v i t i e s proposed f o r Well Mo. 1 .

In acc <1ance w i t h 30 CFR 250 .34 , rev i sed December 13 , 1979, a:xf o^r l e t t e r dated January 29 , 1979, t h i s p l a n has been determined t o be complete as o f A p r i l 29 , 1935, and I s now be ing considered f o r a p p r o v a l .

Your p lan c o n t r o l number 1s N-2114 and should be re fe renced i n your communica­t i on and correspondence concern ing t h i s p la .

S incere ly y o u r s ,

(Orig. Sgd.) D W. Solanas

0 . W. Solanas Regional Superv iso r Rules and P roduc t i on

bcc: Lease OCS-G 7132 (OPb-3-2) (FILE ROOM) |OPS-3-4 w/Publ lc I n f o . Copy of the plan (PUBLIC RECORDS ROOM)

D0-7

M J T o l b e r t : g t j : 4 / 2 3 / 8 5 : D i s k 3a

Office of Program Servictf

APR 3 0 1985

Records Management Section

INITIAL PLAN OF EXPLORATION

SOUTH PADRE IS ,D BLOCK A-75, 0CS-C7132

On October 19, 1984 your o f f i c e approved a Revised Plan of Exploration vhich included South Padre Island, Blocks A-70/71, OCS-G4530/453L as follows:

Proposed Surface Location

500'FEL & 1100'FSL of Block A-71

Proposed Bottom Hole Location

Anticipated PTD Spud Date

Oct. 15. 1984

Days to D r i l l

90

On December 20, 1984 the Corpus C h r i s t i D i s t r i c t approved a sidetrack, bottoa hole lo c a t i o n , and depth change. In addition the surface location changed per the resu l t s of a survey taken when the r i g was spotted on location. The new well information was:

Proposed Well Surface Bottom Hole No. Location Location PD

J 630'FEL & 1089*FSL of Block A-71

The sidetrack hole was planned to raise angle to and maintain tc TD. Directional problems occurred i n an attempt to maintain the proposed angle and the actual angle increased to . Bit weight was reduced i n an attempt to drop angle, but the problem was compounded by high torque and frequent stuck pip, in the high angle hole. Structural trends indicate that the c r i t i c a l objective vould D e o f pS A-/0 with no hard lines on the north/south target. At

' the torque problems along wirh the reduced b i t weight induced severe right hand w*lk dropping the heading from S59°E to S3K°E. At TD of

che actual bottom hole location was and :«I!CVT

of Conoco's 31ock PS A-75. Geologically, the sidetrack hole achieved the target i n the same stru c t u r a l trend as the proposed location. In summary, f i n a l well informaclon is as follows:

Well Surface Bottom Hole No. Location Location Depth

1 629'FEL & 1089'FSL v i Block A-71

RS/10

I n i t i a l Plan of Exploration Page 2

This exploratory well was d r i l l e d by a mobile, self-elevating d r i l l i n g platfonn Glomar Main Pass IV. Drip pans were in s t a l l e d under a l l equipment which could have been a source of p o l l u t i o n . No waste products which contained o i l were disposed of into Gulf >f Mexico waters. Domestic wastes were treated by onboard sanitation treatment i c i l i t i e s . These waters plus formation and d r i l l waters were disposed of at tne s i t e .

South Padre Island Blocks A-70/71/75 are located approximately AO miles from t h e i r closest point onshore (East of Cameron County, Texas). Operations were served by Conoco's shore base which was located i n Port Mansfield. This shore base served the following purposes: L.) loading point for tools, equipment and machinery to be delivered to our offshore locations; 2.) crew change and transportation base; and 3.) temporary storage for materials and equipment. The base was equipped with the necessary loading docks and cranes for convenient and safe operations. Full time dispatchers were employed at the base in order to maintain 24 hour contact with offshore personnel.

Safety i n d r i l l i n g operations was accomplished through: 1.) adequately designed casing programs; 2.) the use of blowout preventors and associated well equipment of adequate pressure rating to contain anticipated pressures; 3.) the use of su f f i c i e n t mud volumes to insure control of the w e l l ; 4.) the use of mud monitoring equipment; and 5.) the use of supervisory personnel properly trained in pressure control. Fire d r i l l s , abandon ship d r i l l s , the i n s t a l l a t i o n and use of required navigatioi.al ids and lifesaving equipment and a l l other shipboard safety requirements wer^ conducted pursuant to Coast Guard regulations.

Conoco Inc. i s a member of Clean Gulf Associates (CGA). CGA is a cooperative designed to own and maintain a large inventory of o i l s p i l l clean-up equipment. This equipment and the necessary marine supervisors for use i n an advisory capacity are available to member companies during s p i l l events. Major equipment items available through CGA are fast response open .ea and bay skimmers, high volume open sea skimmer systems, shallow water skimmer systems, and an inventory of known resources available for emergeny o i l s p i l l clean-up and control. Our updated Accident Discharge Contingency Plan was approved by the MMS on March 14, 1985.

As per the Air Quality Regulations 30 CFR 250.57 (Federal Register March 7, 1980), Attachment I is a l i s t o.' actual emissions during the d r i l l i n g operations. Emissions from ^ach f a c i l i t y were estimated from EPA AP-42 and a l l calculations were based on worst possible case. Attachment I I i s a schematic of the d r i l l i n g operations and indicates the height of emissions above sealevei.

RS/1C

I n i t i a l Plan of Exploration Page 3

The period of time the f a c i l i t y had emissions was based on the d r i l l i n g operations lasting 124 days. During t h i s time emissions were based on the following factors:

Using the above estimates, the table i n Attachment I was compiled. Also included in this table are the maximum allows'le emissions. These values were bases on exemption formulas in the Federal P ,ister and the d r i l l i n g operations being 40 miles from the nearest shore as shown in Attachment I I . Considering this information, we did not i n s t a l l a i r quality p o l l u t i o n controls.

Structure maps, cross sections, a location p l a t , and a l i s t of d r i l l i n g f l u i d s are alsc attached. Shallow hazards data remains the same as in our PS A-70 Well No. 1 POE approved by your office on October 19, 1984.

D. L. Byers Coordinator Environmental Af f a i r s

DLB/RJS:mh

Attachments

Standby Boat: Work Boac: Tug Boat:

Welding:

Rig:

Cementing: Crane: Helicopters:

6000 HP (5 Cat D-399TA dlesels at 1200 HP each) 24 hrs/day and 7 days/week. 24 hrs/day and 7 days/week. 24 hrs/day and 4 days/week. 2-4500 HP diesel 24 hrs/day for 4 days to tow r i g i n and out. 1- 50 HP diesel running 4 hrs/day to power welding u n i t . 2- 200 HP diesel to power unit running 28 hrs/we11. 2-110 HP diesel to power crane running 4 hrs/day. 3 flights/day.

RS/10

Attachment I PROJECT EMISSIONS PS BLOCKS A-70/71/75; OCS-G4530/45^1/7132; WELL NO. 1

POUNDS PER DAY OF OPERATIONS

Pollutant D r i l l i n g Rig 6000 HP

so2 295.3

TSP 317.18

4440.53

cn 961.06

VOC 355.24

Tota] Emissions (Tons)

Year S02

8.77 1984 (54 days) 1985 11.24

(70 days)

Max. Allow. 1332

TSP

9.15

11 . .

N0X

129.00

Boat w/2D0 KW

Generator

6.20

0.00

32.20

14.30

4.10

CO VOC

29.13 10.46

1332

165.22 37.33 13.40

1332 39,766.6 1 _J32

Helicopter 3TOL Cycles Two Engines

Tugboat 2-4500 HP * Diesels

Crane 2-110 HP Diesels

Cement 2 -200 HP Diesels

Welding 1-50 HP Diesels

1.08 442.94 1.80 19.68 .41

1.50 475.77 1.94 21 .14 .44

3.42 6660.79 27.14 29o.()4 6.17

34.20 1441.59 5.87 64.08 1.33

3.12 532.86 2.17 23.68 .49

Note 1: Max. Allow (Tons Per Year) = 3400D 2 / : f o r CO i

33.3D for S02, TSP, N0 X , VOC, where D= 40 miles

Note 2: H.P. x hrs run/day x g/HP hr = #/d . , where g/HP hr comes from table 454 gr/# 33.3/of EPA AP-42, Compilation of Ai r Pol lutant Emission Factors

-co Inc . • w+y P\a+

liioc s A-torn As A+TacV\t^eoA;Tx-0

E

PS A-ni

su 0 1&W F^L

CONOCO INC. LOCATION AAA?

PS ftiocvc A-no/n/is-VJ ELL NO. 1

SCALE: 1"-- 200O' ATTACH IAE WT x-@

P r o p o s e d Mobi le D r i l l i n g R i g

CONOCO INC. PS BLOCK v n o 'ti/ns

WELL tfO.l MTQcWtrVH:-©)

Hie following i s a U s t of d r i l l i n g and completion f lu ids that may be used in this plan.

There w i l l be no intent ional discharge of hazardous material in v i o l a t i o n c f EPA or DOI regulat ions. D r i l l i n g mud w i l l be disposed of on s i te provided i t is not o i l based and

provided i t complies with EPA's permitt ing procedures and gu ide l ines.

PRODUCT

AKTAF 10-S

Aluminum Stearate

Arco Seal

AZ-32

Bactron KM-7

Barite

Basco-50

Basoo Bestos

Benex

Bentonite

Bex

Bicarbonate o f Soda

B i t Lube

Breakers

Bridge Heal

Buffer

Calcium Bromide

Calcium Carbonate

DESCRIPTION

Mixed Oxy e thy la ted Phenols, Nonylphenols and Potassium Hydroxide

Aluminum Salts reacted with Stearic Acid

Shredded Cellophane

Vegetable O i l base with Hydroxyethyl Cellulose type Polymer with Aldehyde

Corrosion Inhibitor with bacterial . '• properties

Barium Sulfate

Nonfarmenting starch

Shredded Cellophane

Anhydride Co-polymer

Wyoming Bentonite

Synthetic Polymers and Carbonates

Sodium Bicarbonate

High pressure lubricant with Potassium Hydroxide and Suifurized Phenols

Cellulose Enzymes, Sodium Persulfate

Calcium Lignosulfonates, Calcium Carbonates and Este rated Polysaccharide

Sodium Acetate

Calcium Bromide

Calcium Carbonate

Revised 10-79

p.'coocr

Calcium Chloride

Carbo Free

Carbonox

Caustic Soda

CC - 16

Cell-o-seal

Cement

Chemtxol-X

Circotex

CL/CLS

Clay

CMC

Con Det

Cortron 126

Cortron R-66

Cortron HE*-14

Cortrcr. RD-2202

Cortron KD-2264

Cottonseed O i l

CQ

Cronox 609

Cronox 235

CY 3er.

Calcium Chloride

Orcpnophilic Clay with t a l l Oi l Emulsifier

Lignir* Material

Sodium Hydroxide

Solubilized Sodium Salt of Ligni t ic Humic Acid Power

Shredded Cellophane

Mixture of Calcium Alurainates and Silicate:

Cautized l ign i te base with an Organo Aery late Ccrtcosition

Blend of sized carbonates

Chrome Lignite - Chron* Lignosu] fonate

Sub-Bexitonite

Sodium Carboxymethyl Cellulose

Anionic Surfactant

Amine Sulf i te

Filming Amine

Quaternary Amine

Corrosion Inhibitor with bacterial properties

Water soluble amine with amine su l f i t e and oxygen scavengers

Vegetable Oi l from cottonseed

Causticized Ferrochrome Lignosulfoante

Ethoxylated Amine with IPA

Ethoxylated Amine with IPA

Co-polymer contains Acrylari.de

PFODOCT DESUrU-frxCN

Cypan

DD

Dakolite

Desco

Dextrid

Dowell F-75

Drillaid 420

Drilltxeat

Drispac

Duratone

EDL-5

E-Z Mul

Emulsite

Fiber Seal

Flo lex

Foam Ban

Gel Tone

Gold Fury

Gypsum

HAI 75

8DO-48

Sodium Polyacylate with Acrylcmtri le

Aqueous blend with Diethanol Amides

North Dakota Lignite

Sui f oan ry la ted Tannin contains chrome

Ncnfermenting starch

Fluorochemical Quaternary of Methyl Iodide

Bentonite Extender and Selective Flocculer.

Phospholipid Surfactant contains T eei, th in

Polyanionic O l l u ] cse

Lignit ic Material

Mineral Oi l Surfactant and Iscpropyl Alcob

Emulsifier with Methp—, — J "aleic Anhydride

Caustic Ligni '

Processed Cax

Blend cf LiennsgJ foniaM, Carjactaydrates, and Carbonates

Octyl Tri-butyl Phosphate and Organic Silicone

Organo-Clay

Decreaser, six more surfeni- N-60 surfactant

Clacium Sulfate

Iscorcpanoi

Poiymar Beads

Hydroxyethyl Cellulose

Calcium Lignosuifonate Calcium Carbonates

PROJUCT DESCRIPTION

HME

Hytec

Imoo Flo

Imco Phos

Imco SWS

Imco Thin

Inpermix

Jel Flake

K-Flc

K-Lig

KCL

KOri

Ken t o l KW-12

Kemcreak

Kleenup

Kwik Seal

LD-8

Lamco Flakes

Licco

Ligoon

Ligcox

Lignite

Etho. -.Li.". . onyl-phenol and Alkylated Phenol

Blend of Synthetic Polymers and sized Carbonates

Hemlock Extract

Sodium Tetraphosphate

Sulfonated Alcohol Ether and Ethoxylated Alcohol

Sodium Hydroxide and Lignite

Pre—gelatinized starch

Shredded Cellopha'

Oxide Adduct of Glycerine

Potassium Salt of Lignitic Material

Potassium Chlor ie

Pccassium Hydroxide

Corrosion inhibitor of imidazoline salts and methanol

Calcium Lignosulfonate

Blend of Surfactants, Butyl-cellosolve, and Monoamine detergent cccpounds

Cent:uiation of granules, and fibers

Aluminum salt of a fatty acid dispersed i n Prcpcxylated Oleyl Alcohol

Shredoed Cellophane

Lignite

Sodium Salt cf l i g n i t i c Material

Lignite

Lignite

PRODUCT

Lime

Lubri Film

Lubri fTHHc

HD

Magco I n h i b i t o r 303

Magoonol

Msgcophos

Mica

Milcon

M i l f l c

Milcex

Mon Pa.;

Mud Citanout-Acid OES)

-iUd - Sweep

My - Lo - Gel

Nylo Seal

Nut Pad:

Nj tplug

CS K i Cal

Oilphos

Pal -uc 110

Pal Mix 210

Pal Mix 2?>A

OESCRTTTICN

Calcj."- hydroxide

Aluminum Sa l t o f an organo f a t t y acid c a f ^ x

Polystyrti Ac Teflon Beads

Ethoxylated Alcohol w i th Sodium S i l i c a t e Buffer and C3VC Viscos i f ie r

Blend of Morpholijw Ardne type corv..-*ttas wi th IPA

2- e thy l Paxanol. 2 ethylhexyl Alcchol

Serium Tetraphce-phate

Mica i 'akes [ii. * . .-ate:.}

Fa- y me.*! P c f U s d l i g n i t e - m ^ f i ^ a wi th Zinc

Hemlock Bark Extract

Mica Fla):es

Poiyanioniw* Cellulose

Hydrochloric acid anc isopropanol

' ">acer

Com Stares

Ground Shredded Nylon

Groind up nut shaJls

Ground walnut shells

Calcium P/droxice

Sodium Tetraphosphate

Cellulose type Polysaccharide

100% T r i - b u t y l Phospharr

CXv.tains Alky I Pyridine wi th less than 2% Gluteraldehyde

i

PR3PUCT

Pal Mix 380

Pal Mix Extender

PEN 5A

Perma-thinz

Petro-tone

Phenoseal

Potassium Carbonate

Potassium Chloride

Protecto Mul B

0-B.ntjcin

Quellxa- h

Ray f l a

RD-111

Pesinex

Rhe-o-con

Royal Seal

SA-5B

Salt

Salt fel

SAM-5

S.A.P.P.

Slik-5

SLX

Soda Ash

Glucose £?se Fol^neu.

Buffer-inorgd'/iic AJ-kaline Phosphate

Methanol

Aluminum Chroma lignosu] fonate

0r^ano-C3ay

Lamina tr d Tharacofet P las t ic

Potass: - n CarJ^onate

Potassii-^n Chloride

Blend 02 at tapulgi te clay, roagnesiurr oxide, and coconut diethanolamine

Ferrocr rrjro l ignosuifonate

Tannin .' . m Quebr .cho Bark

Hemlock Bark Extract

Blended L.' gnosulf onate cental ;^ Bichromate

Co-polymer of a Sulfonated L ign i t e and a Phenol Formaldehyde

Chrome Lionosulfcnate

Groundup Movie F i lm

Al ipha t ic Carboxylic Acids

Sodium Chloride

Attapulgi te Clay

Sodium Acid pyrophosphate

Nonionic Surfactant

Ligni te Suri-'ibe Surfactant

Sodium Carbonate

Sodi um Bichromate

So I.un Chromate

Sparer Mix

Speed D r i l l

Sparse.

Stab-Vis

Stabi-Prop

Stabloi:'.

Start.

Super- .ol

Super Lig

Superdri.'J.

Supertron 62

F'-rfactant

5-v:tcove

Synergic

' I ance

Tannathin

Tanne,v

2hsr?r. x

unical

Uniflcv

vc -' ;•

Visro .*>38

DESCRIPTION

Sodium D" chromate

Sodium Cnromate

Oleic Acid, Primary Oley lattice Dimerized Oleic Acid and ^ee Party Acid

Tall Oi l Soap PtaVlsifipr

Chrome Lignosulf onate

Cirome Lignosuifonate

Chrome Lignite

Nonfermenting Starch

Pre-gelatinized Starch

Hydrophilic Organo-Clay Ccrip.'ex

Lignite

Gilsonite Ccmpound with Cavs .J. cized T ?nit

9% Cocodiamine witn r.-^ium Sul f i t e , Methyl Alcholo and Ina dar nine Alcohol

Oxyethalated Phenols

Oi l soluble Amine Dodecyl Benezine Sulfonate

Potassium Sodium Silicate with a Tannin

Caust -cized Licpdte-CAiebracho

Lignite

Ouebracho Extract

Sodium Stearate

Chra.e modified Sodi--. Li ..^Ylf^ate

Gilron\ ui

1 odi-ie-J Lignosuifonate v.i.c;: C_rome

F a r t . i l l y C/uaternized Polysnine m C«. anr. W ter Solution

PRCUXT DISCKEPTTCN

Vix-Tex

Whites PF 294

Whites PF 296

W.O. Defoamer

X-tend

XC Pc.vmer

XMDC (RD)

XP-20

Zinc Bromide

Zinc Carbonate

Zinc Chloride

Blend of Synthetic Polymers and SJ-»ad Carbonates

Contain liquid CAiarternary tacis

Bactericide contains Formal rtphydc

Contain3 Potassium Hydroxide

Co-polymer Bentonite Extender

High molecular weight jv»g-chaiT«d Polymer Xanthum Gum

Blend of Monodialxyl Polyoxyechyiene and riiosphates

Chrome Lignite contains Potassium Hydroxide

Zinc Bromide

Zinc Carbonate

Zinc Chloride

SDKrap