DATE 7' 2- " f 7

1 TO: OP3-3-4

FROM: FO-2-1

Unit Pian of Explorationjflam mad Eini.Uiiii

LeaseC>i OCS / Control No. U- L^9^

Office0* ProEram M »

JUL 0 6 1387

(conoco)

Wai l i y T. PrMCOtt Conoco Inc. Divition Manager PO. Box 2197 E««t«m Gulf of Mexico Houaton. TX 77252 North American Exploration (7131 293-2205

NON-CONFIDENTIAL

June 18, 1987

U.S. Department of the In te r io r Minerals Management Service Gulf of Mexico Region 1201 Elmwood Park Boulevard New Orleans, Louisiana 70123-2394

Attention: Mr. Ralph J . Melancon Acting Regional Supervisor Production rnd Development

Gentlemen:

Supplement to the Second Annual Development Opetations Coordination Document, Green Canyon 184 Un i t , Unit No. 14-08-0001-20257, Pifshore Louisiana, Your Reference RD-3-2 (C-44284)

The above referenced Development Operations Coordination Document (DOCD) was submitted on February 26, 1987 and approved Apri l 1 , 1987, and supplemented Apr i l 15, 1987, and approved Apr i l 22, 1987.

RECEIVED '%

JUN 2 4 198/ 9* FIELD #•

% 4 OPERATIONS

Conoco Inc. and Texaco Producing Inc. wish to supplement the current DOCD by submitting the fol lowing we l l .

Green Canyon Block 223 Well No. 4

Surface Location: 200' FSL and 5,900' FWL of Block 22f MD: 7,000' Water Depth: 1,960' Rig: Semisuou.ersible Probable Commencement Date: August, 1987

This well w i l l be d r i l l e d by the Zapata Yorktown semisubmersible d r i l l ­ing r i g . The Yorkcown is currently d r i l l i n g the Green Canyon Block 141 Well No. 1 fur Conoco and Texaco, which should be f inished by early July.

The onshore bases for operations during the proposed exploratory d r i l l ­ing act iv i ty w i l l be our exist ing shore base on Grand I s l e , Louisiana and the Martin Fuel Dock in Fourchon, Louisiana.

POE 1/010a

Minerals Management Service June 18, 1987 Page 2

Oil Spill Prevention and Response

Pollution s p i l l prevention w i l l be accomplished pr imari ly by compliance with the design, equipment and operations requirements of OCS Orders 2, 5, and 7. Procedures and guidelines fo r s p i l l reporting in accordance with applicable regulations are provided in our Contingency Plan for Accidental Discharges for Oil or Hazardous Substances. This plan sat­isfied a l l requirements of OCS Order 7 for an Oil Sp i l l Contingency Plan. The plan provides both advance preparation and action procedures for a Divisional Task Force and an Operational Response Team. Resources made available include Clean Gulf Associates equipment, company and other industry-owned equipment and that of several local o i l s p i l l clean-up contractors. Pertinent CGA equipment including several fast response units are located at Venice, Grand I s l e , Houma and Intracoastal City, Louisiana. A fast response un i t can be deployed and on the scene within 24 hours.

Environmental and Safety Safeguards

During d r i l l i n g operations, appropriate requirements of OCS Order No. 2 for gas detecting equipment to monitor mud returns and for BOP equipment to maintain well control w i l l be met. The r i g used w i l l be equipped with curbing and dr ip pans around equipment as necessary to prevent pollution and operations w i l l be conducted under an approved Cr i t i ca l Operations and Curtailment Plan. The r i g w i l l have adequate f i r e - f i g h t ­ing equipment and w i l l be bound by contract to operate in compliance with appropriate U.S. Coast Guard regulat ions.

Attached are a location p la t , v i c i n i t y p l a t , a i r emission data sheets, l i s t of mud components and addit iyes, and pert inent r i g data.

Conoco Inc. , as Unit Operator, requests your approval of th is Supplement to the Second Annual Development Operations Coordination Document of the Green Canyon 184 Uni t . Conoco Inc. could commence operations on the well as early as the f i r s t week of Ju ly , therefore your prompt approval would be greatly appreciated.

Please feel free to ca l l the undersigned at. (713) 293-2205 or Lee Tacon at (713) 293-3740 i f you have any questions.

Thank you.

WTP/LBT/lk Encs

POEl/OlOa

183 184

22 7 228

CONOCO INC. Block 228 OCS-C 5912

O «1 Gr id

#2

O

BHL

# 3

5900'

227 228

271 277 >ot'

Conoco Inc.

Q LOCATION PLAT • • ^ Crecn Canyon Block 22R A r m

Crcen Canyon Block 2?f OCS-C 591? W P I I N o *

Scale: r ' - ? > V i '

Approved TBRfDRR 5/28/87 tt'E

TNOT

GREEN CANYON 184 UNIT VICINITY PLAT

PROJECTED AIR EMISSIONS GREEN CANYON 228 WELL NO. A

D r i l l i n g Rig Emissions

Pollutants CO TSP SO N 0X VOC

Lbs/Day 39.25 N/A 18.07

267.93 8.93

Total Tons/ A5 Days 0.8B N/A 0.41 6.03 0.20

Tne above figures are based upon A5 r i g days and d r i l l i n g 7072' of new hole. Emission estimates are based upon EPA's publication AP-A2 and PB-27226B e n t i t l e d "Atmospheric Emissions fron Offshore Oil and Gas Development and Production" - June 1977.

Other Emissions

Pollutants Lbs/Day Total Tons/A5 Days CO A0.3A 0.90 TSP 0.75 0.02 SO A.1A 0.09 NO: 56.A7 1.27 VO E 20.76 0.A7

The above figures were calculated as per EPA Publication AP-A2 and includes emissions related to helicopter landing/takeoff cycles and boat a c t i v i t y including f u e l loading and t r a n s i t loss and emissions while running, loading and standing by.

Total Emissions

Pollutants Total Tons/A5 Days CO 1.76 TSP 0.02 SO 0.50 NOj! 7.30 VOC 0.67

NOTE: Distance from nearest state land is approximately 98 statute miles.

(

Tne following 1« e l i . t of be t fed onelle In the Cul f

w i l l be U complfence wi th

WODOCT

A]usinus Stearate

Barite)

Bentonlte

Bicarbonate of Sode

Cauet lc Soda

Clean-Soot

Cement

D i e e e l Fuel

Llgnoeelfonete ( C L / C L S , Q-Broxln Spereene, e t c . )

Clay

CMC

Drlepec

Cold Fury

rer L i g n i t e

Lime

LVT

•Sea Hon-Pac

Hor-Rex

Nu'plng

r i p e Lex

Rcelncx

Srcked Flehlng Toole

S a l t

S a l t C c l

SAH-5

Soda Aeh

S t a r c h

Cuabc Bweter

d r i l l i n g end completion f i e l d eddltfeee that „ . y of Mexico. Dlachergc of eny of theee ateterlele U.S. ETA Ccnerel F e r a l ! Ro. CHC260000

DESCRIPTIOH

Aluminum S e l t e reacted with S t e a r i c Acid

Barium Su l fa t e

Wyoming Bentonlte

Sodium nicarbonate

Mineral o i l and addit ive

Mixture of Celcliae Alueilnetea and S l l l c a t e a

M a t u r e of C e l c l u a Aluminates end S l l l c e t c c

tub-Bentorilte

Sodium Carboxymethyl Cc l lu loee

Folyenloa lc Ce l la loee

Degnaecr , » lx more eurfonlc K-60 e u r f e c t e n t

Potesslum Chloride

L i g n i t e

Calcium Hydroxide

Non-toxic K l n e r e l O i l

Mica Flakea ( S l l l c a t e a )

Polyanionic C c l l u l o e e

Carbohydrate Polymer (water a o l u b l e )

Cround Valnut F h e l l e

Azcllne and wool greeae, c o n t e i n t 2Z

la o p r o p y l e l c o h o l

Co-polymer o f e Sulfoneted L i g n i t e end e Phenol Formaldehyde

/ l r blown a a p h a l t , calcium hydroxide and

f a t t y aclda

Sodium Chloride

A t t a p u l g i t e Clay

Spacer

Sodium Carbonate

P r r - g c l e t I n t t e d Starch

Detergent

S e m i s u b m e r s l b l e

ZAPATA YORKTOWN N o m i n a l w a t e r dep th ra t ing 2 . 0 0 0 '

H u l l — D i m e n s i o n s D r i l l i n g E q u i p m e n t

Reg is te red

Overal l L e n g t h Overal l W i d t h Depth Opera t i ng Draft Natural

Heave Per iod Natura l

P i tch Per iod Natural

Roll Pe r i od Cranes

A n c h o r i n g System

Towing S p e e d in C a l m Sea

S t o r a g e

Dril l ing Wate r Potable Wate r Fuel Oi l Liquid M u d Total Bu l k M u d

and C e m e n t Sack S t o r a g e Sewage T rea t ing

System Desal imzat ion

Unit Heliport

Sen-submersible with six stabilizing columns U S A Built at Avor.dale Shipyard. New Orleans, Louisiana 260' 200' 80'

45'

21 sec

30 sec

34 sec

One Manitowoc Mooel 135, 120' boom. 55 lon capacity at 30' radius One Maniiowoc Model 135. 80 ' boom. 56 ton capacity at 30' radius One Manitowoc Model 70. 110' boom, 28 lon capacity at 30' radius Eight Vmcmay Otfdnll 40.000 Ib anchors with eight 2.500' lenglhs ol 2 V steel stud length chain and eight 4.500' lengths of 2 V wire rope Four Skagit double drum wildcat windlasses rated at 450.000 lb tension with release up to 900.000 i t tension

10 knots with 8.000 hp sea tug

Quarters Personnel

Surv ival

8.800 bbls 1.325 bbls 6.900 bbis 1.720 obis

10.200 cu ft 6.000 sacks

Red Fox. 5.000 GPD

15.000 GPD capacity Designed to accommodate S-61 helicopter Quarters for 84 persons

Drawworks

Mam Power Plant

Pumps

Rotary Riser Pipe

Equipment

BOP Equipment

Substructure

Derrick

Pipe Racking Svstem

Drill String Compensator System

Mud Mixing Pumps

Cementing Unit Drill Collars and

Drill Pipe

Rated to 25.000' Oiiwc:1 Model E-3000 driven by two EMD D79MB dc electric motors rated at 800 hp each

Three EMD-16-645-E8 d.esei engines rated at i .950 bhp at 900 rpm with three EMD Model A-20-N6 ac generators ABS rated and cer­tified for 1.400 kw Ross Hill SCR system Two Oilwell A1700-PT triplex pumps each driven by two EMD D79MD electnc motors Oilwell 4 9 % "

2.000' of 2 1 " O D x 2 0 " ID 45' stroke slip |omt. riser tensioning Syslem by Rucker Cameron 1 8 V single stack system wilh two 10.000 PS' wp Cameron type U double ram preventers, and two Ruckei-Shaffer 18 V ' sphencai preventers Derrick Mlg welded rig<a frame lg suppon 160' derrick 160' x 40 ' x 40' designed to accommodate a motion compen­sator and automated pipe racking system

BJ three-arm electro-hydraulic vertical racking system

Rucker-Shaffer IP stroke

Four 6 " x 8 " centrifugals Halliburton 9 V OD x 3 " ID x 31 collars 8 " OD x 2 " / „ " ID x 31 'collars 6W" OD x 2'A" ID x 31'collars. 5 " OD 19 50 lb . Grade E. Range 2. 5" OD. 19 50 lb . Grade G 105. Range 2

Three Brucker s u r v i v a l capsules, one s e l f - r i g h t i n g l i f e boat

ZAPATA YORKTOWN

ZAPATA YORKTOWN

N M . I / J V U Z / l l / B

ZAPATA YORKTOWN

2/1 ! / • »

ZAPATA YORKTOWN

a*, vum l / l l /BS