In Replj pfcfer To: P.P-J JUN 0 7 1985

C t i * s Service Oil and .at Corporation At ten t ion : Mr. R. S. rhitton, J r . Post Of f ice Box 27570 Houston, Texas 77227

Gentl e«en:

Reference i s Hade to your I n i t i a l r.an of Exploration received May 23, 1985, for Lease OCS-G 7131, 31 ock 1133, South Padre Island Area. This plan Induces the a c t i v i t i e s proposed for Hells A through

In accordance witn 30 CF8 £51.34, revised Oecaaber 13, 1979, and ovr l e t te r dated January 29, l"70, th is i l an has *een determined tn he coeplete as ef June 6, 1985, and 1s now being considered for approval.

Your plan control nuaber s M-2151 and should b« referenced in your communica­t ion anc correspojidenc* concpmlno th is plan.

Sincerely yours,

(ORIG. SGD.) RALPH J. MELANCON D. V. Solanas Regional Supervisor Rules and Production

bcc: Lease OCS-G 7131 (OPS-3-2) (FILE ROOM) f oPS-3-4 w/Publlc In fo . Copy of the plan (PUBLIC REC0R0S ROOM)

1)0-7

KJTo1bert:gce:j724/85 Disk 3a

Office of Program Services

JUN i i 1985

Ra *nr.

O X Y

S e c a w ^ S CITIES SERVICE OIL A N D GAS CORPORA TION I S E R V I C E 1980 POST OAK BOULEVARD

P 0. BOX 27570 HOUSTON. TEXAS 77227

May 17 , 1985

*** 2 3 1985

M i n e r a l s Management S e r v i c e m u m n o * K m m P. 0. Box 7944

. . a i r i e , Louis ia- .a 70010

A t t n : Mr . D. W. Solanas Oi l /Gas Superv i so r P i e l d Opera t ions

Re: P l an o f E x p l o r a t i o n • South Padre I s l a n d Bloclc 1133

OCS-G-7131

Gent lemen:

E i g h t (8) c o p i e s o f t h e s u b j e c t p l a n a r e e n c l o s e d f o r r e v i e w . F ive (5) copies ( y e l l o w ) c o n t a i n p r o p r i e t a r y g e o l o g i c a l and g e o p h y s i c a l i n f o r m a t i o n .

I f any f u r t h e r i n f o r m a t i o n i s r e q u i r e d , please n o t i f y t h i s o f f i c e .

Yours . a l y .

CITIES SERVICE OIL & GAS CORPORATION

R. S. H u t t o n , J r . Manager - P roduc t ion G u l f o f Mexico Region

WMJ/RSH:jf

At tachments

A S u e S l O i A f l v O f O C C I O C N T A L P E T H O L B U M C O L O R A T I O N

PLAN OP EXPLORATION CITIES SERVICE OIL AND GAS CORPORATION

SOUTH PADRE ISLAND BLOCK 1133 OCS-G-7131

DESCRIPTICM OF WORK TO BE PERFORMED

Ihis Plan of Exploration providea for the d r i l l i ng of f ive wells.

BMMgMB nas Drilling i s scheduled to oommence August 1, 1985.

Tnffi TTI rrsm.RTC Bffl m m

The average time to d r i l l a ve i l i s approximately 90 daye.

TOTAL TIME 7T» CTMn.VTP. mtCRM.

Exploratory operations may last up to 3 years.

SUUJM HAZ ARCS B M P

The geophysical data inspected for interpretation to determine shallow hazards and magnetic anomalies consisted of s

1. High resolution DPS v seismic system with a 200 cubic inch water gun energy source

2. 7.0 KHZ scaled subbottom profiler

3. 300 meter per channel scar sonar data

4. Precision depth recorder

5. Mtgnetometer

6. 24 KHZ echo sounder

A l l d r i l l i n g sites are free and clear of shallov d r i l l i n g hazards within 500 feet and do not pose any unuaual d r i l l i ng problems.

The shallow hazards report for this block has heen provided to HMB.

aaagyg ms A structure of the appropriate sands with well locations i s appended i n

proprietary copies.

wgj. Tfnvnms

A map showing surf ace locations, TVD (in proprietary copies), and BBL (in proprietary copies) is appended.

[flfignrrr* u a m A map showing the location of the lease block relative to the shoreline

is appended.

CUffitHE sonprsw RASE » m wv

Our Ingleside, Texas shore baee vil l ba utilised for this operation, NO expansion or additional hiring vi l l be required, will be required.

ML am tammc UM An approved updated copy of a ties' "Oil Spill Contingency plan" is on

file with the MMS in Metairie, Louisiana, lhe shorebase in Ingleside, Taxes v i l l be ueed for our base of operations in the event of a spill. Oil spill equipment is available in corpus Christi, Texas and could be deployed" in 35 hours.

MD nmrrwra A l ist of aud additives is appended.

IBM gHBfl water depth varies from 116' along the southwestern corner of the block t

a maximum of 130' at tbe northeast corner of the block.

A description of a jackup drilling rig typical of the rlga vhich sight be used with a list of pollution prevention equipment ie appended.

ATR arras ram

Prilling Biq-Allowing an average of 90 days for each well, i t is estimated that a

maximum of 3 exploratory wells would be drilled in any ona calendar yaar. Utilizing table 4-3 of EPA 450/3-77-026 report entitled "Atmospheric Emissions from Offshore Oil and Gaa Development and Production" that provides a scenario cf a 30-day, 10,000 foot well, the following gaseous emissions would h-generated.

i J

4-

DISCHARGE (METRIC TONS)

OjDUifili Yearly (A W<

NOg 20.8 62.4

1.9 5.7

HC 0.8 2.4

CO 3.2 9.6

Particulates ?

The proposed location i s approxiaataly 17 miles east froa the new shoreline, lhe emission exemption (B) for the various pollutants ie follows X

CO B • 3400 (17)^ 3 - 22,479 tons/year

NOx

VOC E • 33.3 (17) - 566 taw/year

comparing the amissions froa the drilling rig with the exeaptione, ve are vei l within the limits, eo no further analysis i s neceaaary.

Vork Boat

2000 hp x .75 (load factor) x 75 bra/trip x 12 trips/month x 3 aoa.

• 3,780,000 hp./hr.

1200 hp. x .75 (load factor) x 24 hrs/trip x 18 tripe/month x 3 BOB.

- 1,166,400 hp./hr.

TOTAL - 4,946,400 hp./hr.

DISC ARGE (METRIC TONS/WELL)

SG?

17.90

1.23

HC .58

CO 3.95

particulates ?

i r — " An average round tr ip time for a helicopter to the exploratory rig vould

be 2 hours. All owing 1 trip each day, there vould be 360 hours of flying timer per vei l . Neither of EPA's AP-42 nor 450/3-77-026 present data on a single engine helicopter in flight, lhe limited number of flights and short flying time v i l l undoubtedly result in negligible additions to overall emissions from this exploratory program.

An environmental report is not required.

OH flMBMMg

CZM consistency is not required.

LEASE mauLmm South Padre Island Block 1133 haa lease stipulations 11 and #3. atlas

Service has complied or v i l l comply vith both of these stipulations. No nev or unuaual technology is tc be used for exploration on this block.

NONPROPRIETARY APPENDIX

Well Location Map

Lease Block Location Nap

Nud additives

Drilling Rig Description

OFFSHORE TEXAS SOUTH PADRE ISLAND AREA

BLK. 1133 W E L L LOCATIONS

SCALE: l " 3000'

MUD COMPONENT LIST

PRODUCT

Barite Bentonite Sub Bentonite Lignite Modified Lignite Hematite Calcium Cargonate Sodium Hydroxide Sodium Chloride Modified Lignosuifonate Chrome-Free Lignosuifonate Cuar Gum Nut Shells Modified Lignite Bacterially Produced Polymer Calcium Hydroxide Sepioiite Sodium Carbonate Sodium Bicarbonate Modified Tannin Quebracho Compound Ground Mica

Calcium Sulfate Attapulgite Sodiun Carboxymethyl Cellulose-Regular Grade Asbestos Fibers Sodium Chromate Sodium Tetraphosphate Sodium Canboxy Cellulose Sodium Polycrylate Polyanionic Cellulose Organic Polymer Aluminum Stearate Non-Hydrocarbon Defoamer Detergent Processed Hydrocarbons Number 2 Diesel Organic Esters Uater Dispersible Asphalts O i l Dispersible Asphalts Graphite Lubricants

Non-Ionic Emuls i f iers Anionic Surfactants Sodium A i k y l Aryl Sulfonate Alcohol Basa Defoamer Floculat ing Agent Paraformaldehyde Mineral O i l Emulsifiers Visconsifiers Organophiiic Clay Oil Soluble Surfactanta Fatty Acids Sulfonates Aaphaltic Materials

MOBIL DRILLING RIG EQUIPMENT LIST

The fo l l owing i s an equipment, mater ia l and personnel l i s t

of a jackup r i g t y p i c a l of the r ig s t ha t might be used:

1 . Continental-Emsco 40' x 147' de r r i ck w i t h 30,000

pound API s t a t i c hook load capacity wi t ; irel ing

b l o c k gu ide and seven (7) 60" sheave crown.

Crown block also includes core l i n e and a i r h o i s t

sheaves grooved f o r 9/16" l i n e and c a t l i n e sheave.

2 . Continental-Emsco c-3 type 2 drawworks grooved

fo r 1-3/8- d r i l l l i n e , dr iven by three (3) 1,000

hp D.C. motors w i t h v-200 Parmac hydromatic brake,

ca theads , s and ree l assembly mounted on t h e

drawworks 3. O i l w e l l 37-1/2- ro tary dr iven by 1,000

hp D.C. motor. 4 . 650 Ton swivel - c.E. L-650.

5. 750 Ton t r a v e l i n g block - c.E. MA-60-6-1-3/8.

6 . 500 Ton ro tary hook B.J .

7. Dual shale shaker - Rumba Mcdel 102.

8. Two (2) C . E . P-1300 t r i p l e x mud pumps, each driven

by a 1,300 hp D.C. motor with c . E . PD-5 pulsation

dampenera.

9. Three (3) M i s s i o n 6 x 8R c e n t r i f u g a l mud mix and

super charge pumps w i t h 75 hp A.C. motors.

10. Three (3) Pairbanks-Morse 10 cy l inder Model 38DS-1/8

opposed p i s t o n engines, each ra ted 1,600 hp § 720

rpm d r i v i n g s i x (6) 1,600 RW D.C. generators and three

(3) 1,000 KW a l t e r n a t o r s (one engine i s a u x i l i a r y

engine).

11. One (1) Aqua-Chem 300 gallon per hour fresh water

maker.

12 . Two (2) Le Tourneau Ser ies PCM-120 AS cranes with

100' booms - rated 25 tons at 50' and 40 tons at 26' .

13. 10,000' of 5" C u . 19.5# Grade E Range 3 D r i l l pipe

with 6-3/8" O.D. 18° taper tool jo ints with 5" X-hole

jo ints .

14. 5,000' of 5" O.D. 19.54 Grade X-105 Range 3 d r i l l

pipe with 6-3/8" O.D. !»8° taper tool joints with 5"

X-hole jo in t s .

15. Twenty-one (21) 7-3/4" d r i l l co l lars wi** : r/3

regular connections.

16. One (1) 5-1/4" Hex kel iy .

17. One (1) Varco Model 6500 keliy spinn-w .

18. Halliburton Onit Model HT-400 with recirculating mixer

provided Halliburton does service vork.

19. Schlumberger unit.

20. Pit-O-Graph onit and one (1) rlo-ctiu.

2 1 . Swaco-Degasser

22. One (1) Pioneer Model T10-4 Desi l ter , One (1) Pioneer

Model T16- Desi l ter.

23. One (1) Pioneer Model S3-12 Desander.

24. One (1) adjustable stabbinc board.

25. One (1) w ire l ine measuring device with mini^u* of

14,000' of 0.092 l i n e .

26. One (1) mud gas separator.

27. One (1) 13-5/8" 5,000 psi w.P. LWS Shaffer single

blowout preventer. Cn* (l) 13-5/8" 5,000 pai W.P.

LWS Shaffer double bl«' out preventer. One (1) 13-5/8"

5,000 psi w.P. GK nydrill , with extra element.

One (1) 20" 3,000 psi w. P. MSP 2,000 Hydrii with

21-1/4" I.D.

Pipe Rams for Contractor's d r i l l pine.

28. Accumulator unit (150 gallon c&pac'.ty. 3,000 pai W.P.)

capable of closing a l l blowout prev<i;cera and having

a pump which automatically keeps accumulator up to

rated working pressure, with electric master and remote

panel.

29. Regular Baroid mud .̂ alawce, v ter loas machine, titration

•qui^sent and r.and cont -.. equipment.

30. Crew complement on rig at a l l times.

(a) Cne (1) toolpusher

(b) Tvo (2) f ive (5) men d r i l l i n g crews (12 hours

per day)

(c) Seven (7) roustabouts (12 hours per day)

(d) Two (2) mctormen (12 hours per day)

(e) One (1) welder (12 hours per day)

(f) One (1) rig mechanic (12 hours per day)

(g) One (1) electrician (12 hours per day)

(h) Two (2) crane operator/roustabout pusher

combination (12 horrs per day)

(i) Commissary crew

31. Marine telephone and PM radio

32. contractor shal l furnish r i g 1 nor «t the scheduled

overtime rates fo r work done f o r Operator's benef i t

when they are not working the i r tormal weeing hours

of 6 a.m. to 6 p.m.

33. Caaing protectors i n surface pipe satisfactory

to 0 ^ r M .,r when cou-.r*r.cor-fur..; shed pipe i s i n uae.

U : new ru i r t e - . and e m i s s a r y ( including quartering

and f e e d i n j not i n excess ot three (3) Operator

personnel). A l l Operator personnel i n exceaa of

tr.ree 15) an a l l t h i rd party personnel w i l l be charged

b/ ca rer f o i meals or lodging ao f uxr»l« ed.

35. One C) c i rculat ing fcead with 3,000 pai vorkin capacity

witb a 5" X-hole pin an* a connection for hose.

36. One (1) inside b̂ >wo < to f i t 5- t V i U pipe

furnished with i i g . 77. s u f f i c e n t Coas,. Guard approved l i f e jackets for aU

persons aboard r i g .

-,8. Peraonnel transfer net to be used i n conjunction v i th

cranes.

39. F a c i l i t i e s to load casing materials and supplies-

onto cr of f r i g .

40. B i t subs f o i d r i l l c o l l a r * furnished «ith r i g with

6-5/8* regular connections. 41. Saver subs for 5-1/4" Hex k e l i y . 42. One (1) 13-3/8" 350 tor c .aing eleva'.oi v i t h 13-3/8",

1

5

9-5/8", 7-5/8", 7", 5-1/2", anc* 5" inaerta.

43. One (1) 13-3/8" 350 ton casing spicier with 13-3/8"

9-5/8", 7-5/8", 7", 5-1/2" and 5" inaerta.

44. Planing toola aa follows*

One (1) taper tap with 6-3/8" O.D. box 4-1/2 IP >nnec-

tio;% taper from 2-1/2" to 4-1/2".

OUC 8-7/8" O.D. Overshot with 4-1/2 IF connection,

dastcet grapples: 5" and 6-3/8"

Spiral grappl as i 7-3/4" and 7-5/8"

Coi.WrOla i 5" and 6-3/8"

4Fi, Lubricants for r i g and machinery.

46. Normal r i g operating supplies.

47. Twc i i i 28-man whittaker corporation Bruker Survival

systems complets v i t h launch and recovery system and

platform.

48. Capaci t i t

Fuel 3,000 bbls .

Potable *SL«C l,ooo bbla.

D r i l l llatw* 7,200 bbla.

Bulk mutf 3,120 cu. - t .

Bulk ceaent 4,160 cu. f t .

Liquid mu.i 1,200 bbls

Sack atorage 130 tone ;npprox'.r.*te)

Living quartera with f a c i l i t i e e 59 men

49. *wo (2) - 330 amp r e c t i f i e r voiding machines.

50. M l Tr in i ty NPT-1250 sewage treatment plant.

51. One (1) fork l i f t truck.

52. Three (3) Philadelpax.> Model PTBRO mud mixers.

53. Choke manifold (5,000 pai) with remote controlled

choke.

54. Handling tool, for contractor', d r i l l pipe and d r i l l

collara.

55. compressed air ay.tem (125 pai) with twc (2) lngei*ol

Rani Model 75 air compressor.. 56. Onboard .anitation treatment t a c i l i t i e . tor dcm..tic

wastes.

57. Drip pan. under a l l equipment which could be e^urm

of pollution.

58. Blowout preventer, and ao.ociated equipment of an

adequate p ^ a . u r e rating to contain antic ipated pressure..

50. Mud monitoring equipn»rr.w.

60. Adequate capacity ,or mud, weight material and cement

to meet any need, that may arise.