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bee: Irate OCS-C 6737 (0»S-*-3) (FILE WO*) Gfjh 2*.?. w/Pet>l«e Info. res* n* tht plan end F» (pflrllC !*rnnf>$ rfiftf)

A€oh*rt:<rt1:7/l?/A4 Disk 3b

Tenneco Oil ASA Exploration end Production w r

A Tenneco Company Company

Eastern Gulf Division

PO Box 39200 Latayette. Louwiani 70503 (318)981-7000

JULY 12, 1964

U.S. Department of the) Interior Mlnereis Management Service P.O. Box 7944

Metairie, Louisiana 70010

Attention: Mr. D. U. Solanas Re: Exploration Plan

OCS-6-6737 Ship Shoal Block 97

Sir:

Attached please find nine (9) copies of the Exploration Plan, Environ­mental Report and Consistency Certification relative to Tenneco 011 Company's OCS-6-6737 Lease In Ship Shoal Block 97.

The Summary of Exploratory Wells, the Structure Maps and the 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 respe . proprietary data have been removed from al l but f ive (5) copies of the Exploration Plan.

Yours very truly,

D. R. LeBlanc Sr. Production Analyst

DRL;tmp

kTO0*«eA»ei

PLAN OF EXPLORATION

SHIP SHOAL

BLOCK 97 (OCS-6-6737)

Tenneco 011 Coinpany, the operator of the above referenced lease, pro­poses to conduct exploratory drilling operations on said lease for eval­uating the potential commercial quantities of oil and/or gas.

Plans are to commence drilling operations on or about September 1, 1984 for the 0CS-G-6737 Well No. A utilizing the "6r1ffin-Alexander III" Jack­up rig. This well will require approximate', 60 days to dr i l l . Wells 8 through M are contingent on the results of Well No. A. Each of these wells will require from 20 to 60 days to drill and It Is anticipated that the "Griffin-Alexander III" will also do the drilling. In any event, all exploratory drilling Is expected to be concluded by mid-1989.

Attached are the drilling rig specifications of the "Griffin-Alexander III" Indicating the Important features thereof. Including features pertaining to safety and pollution prevention and control. This rig will be equipped with typical pollution control equipment. Including, but not limited to storage facilities, deck drains, sumps, drip pans, and sewage treatment facil i t ies. Life saving appliances and firefighting equipment of the "Griffin-Alexander I I P be In accordance with U. S. Coast Guard regulation.

Attached Is Tenneco Oil Company's Shallow Hazard Survey for Wells No. A, H, L and M. Submitted under separate cover was "Potential Geologic Hazards and Cultural Resources Survey" conducted by Intersca Research Corporation. A listing of survey equipment utilized 1s Included In this report. Also attached is a location plat of the leased block relative to the shoreline depicting the surface locations. A description of the onshore base 1s In­cluded. Water depth ranges from 18 to 34 feet.

The proposed surface locations of these wells are:

On the summary of Exploratory Wells are the proposed surface location, uor.tom hole location, measured depth and total vertical depth for each well. The structure maps and schematic cross sections reflecting the most current geological/geophysical Interpretation are attached for your review. These attachments are considered proprietary data and should *e exaept from dis­closure under the Freedom of Information Act (5 U.S.C. 552) and implementing regulations (43 CFR Part 2).

Nells ho. PSL

A.I.C.D.E.F.G H.I.J.K L M

4500' 3600' 2250' 3100'

FSL FNL FNL FNL

I 6050' FWL I 3700' FWL I 2000' FNL I 5800' FWL

Page 2 - Plan of Exploration * Skip Shoal Block 97

PI east refer to the A1r Emissions Section to comply with A1r Quality Regulations 30 CFR 250.57.

A brief description of equipment, personnel, and procedures to be em­ployed for preventing, reporting, and cleaning up a pollution sp i l l , In­cluding equipment and deployment and travel time 1s attached.

See the attached l i s t of mud components to be used during the drilling of these wells.

Please refer to the Certificate of Coastal Zone Consistency and the Environmental Report to Comply with 30 CFR Part 250 and 15 CFR Part 930.

QUTTIN-ALTONDER D K I L L D C COMPANY

Rig #3

AMD

1 - Mid Continent U-1220-E8 divided akid electza flow drawworks by two EMD D-79 electric

1 - Elmagco Model 78496 auxiliary brake

1 - Sand reel aaaarnbly with a line capacity of 20,300 f t . of 9/16" line

1 - Sand line guide. Coastal model 54

1 - Crown safety device. Mid Continent

1 - Brake cooling water system with 30 bbl. tank

DERRICK AMD ACCESSORIES

1 - Branham 147 f t . derrick with a dogleg of 98 ft . elevation, 30 f t . x 30 f t . baaa, 10 f t . x 10 f t . top, 1,392,000 lb. gross nominal load with a static hook load capacity of 1,044,000 lb. per API standard 4E with 12 lines strung to the traveling block

1 - Rig-A-Lite explosion proof f lorescent snd mercury vapor lighting system

1 - Dual atandpipe manifold 6" 10,000* test snd dual standpipes

1 - Block Quids for wing only

ICTMBf AND TOWELING BQUIPMsHT

1 - Gardner-Denver independently powered rotary table with two speed transmission, 37-1/2 in. full opening snd powered by ons D-79 EMD electric motor

1 - Hydril upper Kelly guard ball valve 15,000 lb. test 10,000 lb. W.P.

2 - Hydril lower Kelly guard ball valve 15,000 lb. teat 10,000 lb. W.P.

1 - McKiaaick typa RP Pig. 684 traveling block

1 - B .J . 500 ton hook

1 - Oilwell 500 ton swivel

2 - Rotary hoses 3-1/2" x 65\ 10,000 pel

1 - Tri kelly bushing Bsueh Foes

1 - 5-1/4" x 43' t r i kelly

1 - King Circ. head for drill pips

A-l

POWER EQUIPMENT

3 - Diesel engine osnsrstor tats SR12EW EMD power units consisting of t i l t fol lowing t

Model 12-645EI EMD engine 2 D-79GB EMD generators with gear box 1 D-79EB EMD generator equipped with thru shaft to drive

600 KM AC Colustols generator esch skid for s total of 3 - 600 KN AC gsnsxslors

1 - AC switchboard

1 - D353 caterpillar engine with 300 KM AC generator Columbia as emergency stand by generator

MUD PIMPS AHD ACCESSORIES

2 - Gardner-Denver Model PZ-11 Triplex single acting mud pumps 1600 HP driven by 2 - D-79 EMD electric motors psr pump

Piston Diasaster Capacity Discharge Pressure SPM

2 - 6 x 8 x 13 Harrisburg hard iron charging pumps complete with 75 HP, 1200 RPM motors

2 - Hydril K-20-5000 pulsation dampeners

2 - Suction pui sst ion dampeners, larkin

2 - Safety valves 3" type "B" reset safety relief valves

MOD SY.3TEM EQUIPMENT

1 - Brandt Duel rennets high speed shale shaker

1 - Flo-Trend 16 cons mud cleaner ou t f i t t ed eo i t can bs ueed aa s desilter when not needed! as mud cleaner

1 — Sweco Mud Degasser

6 - 10 HP Brandt mud agitators

1-30 barrel tr ip tank 1

5- 1/2 in. 6- 1/2 in. 7 in.

407 gpm 568 gps 659 gpm

6059 psi 4339 psi 3741 psi

120 120 120

KMOJMC TOOLS

1 - Foster Air Power kelly spinner Type 77-02

1 - BJ Hughes Spinning Wrench

2 - BJ Type DB rotary tongs 3-1/2 in. through 17 in.

2 - BJ Type GS center latch elevators

2 - Varco Typa 8DXL rotary slips

2 - Sets dr i l l col lar slips

1 - Varco safety clamp

2 - BJ 350 Ton - 2-3/4" x 132" welders elevators

2 - Gray inside blowout preventers with release tool

DRUX STRUC

500 - Joints 5 in . 19.5 lb . / f t . Grade B with 5 in. X-Hole 6-3/8 in. x 3-3/4 in . 18" taper tool joints. Range 2

150 - Joints 5 in . 19.5 lb . / f t . Grade G 105 with 5 i l . X-Hole 6-1/2 in. x 3-1/2 i n . tool joints. Range 2

12 - 8" x 2-13/16" x 30' long d r i l l collars with sip lock connections with 6-5/8" API rag. connections

12 - 6-1/2" x 2-13/16" x 30' long d r i l l collars with sip lock connectione with 4-1/2" X-Hole connections

6 - 7-1/4" x 2-13/16" x 30' long d r i l l collars with sip look connections with 5 in. H-90 connections

1 - Set of fishing tools for contractor-furnished down hole equipment

Subs necessary such aa • i l ly sub, bit sub and cross over subs for contractor- fumi shed pips

BLCVPLTT PREVENTERS

1 - 13-5/8 in . 5000 lb. w.p. Shaffer spherical blowout preventer with 13-5/8 in . 10,000 lb. w.p. BX-159 flange bottom snd 13-5/9 in. 5,000 lb. w.p. flange top

2 - Double Cameron Type "0" blowout preventer 13-5/8 in. vertical bore 10,000 lb . w.p. with 13-5/8 in. 10,000 lb. flange top and bottom. All outlets 4-1/16 in. flanged H2S trlsa

A-3

•UJNCPT vtmmrnas, continued 1 - Choke manifold 10,000 lb. w.p. 1*28 trim, two positive chokes and one

Swaco Super Choke (Operator Furnished)

1 - Cmesiisi 240 gallon 3,000 pei w.p. a ir and electric motor driven automatic pump accumulator unit with so wen station issmjls control panel

1 - Regan KFL-3 30" 2,000 psi w.p. annular diverter

INSTRLrPfTATION AND TEST EQUIPMENT

1 - Geolograph dr i l l ers control panel with weight indicator, pressure guage, rotary RPM, tong torque gusgs, pump strokers, rotary torque 9US0S

1 - Geolograph-Medaris mud sentry to .record nud volume on three tanks, nod flow and pump stroke, pump rate complete with 12 in . gain and loss guage, both audio and visual alarm full hols automatic shut off with 2 pen circular recorders

1 - Geolograph-Medaris bit sentry automatic driller

1 - Air purge system

1 - Geolograph-Medaris 7 pan d r i l l sentry recorder

1 - Patso hydraulic operated wire line survey unit with capacity of 20,000 ft . of .092 line

1 - No. 821 Baroid mud testing lab

2 - Marine Equipment Ses King 1400 50 ton crane*, with 100' booms '

DfOf MOD AND CEMENT PACKAGE;

4 - 750 cu. f t . , 13 f t . 10 in. high x 10 ft . diameter bulk tanks

3 - 1200 ou. f t . 19 f t . 4 in. high x 10 f t . diameter bulk tanks

1 - 70 cu. f t . surge tanks

HflBHflBg RIO EQUIPMENT

2 - I in. deep well pumps, 1200 gpm st 180' TTU pumps

3 - Harrisburg 3 x 4 x 7-3/4, esch with 50 HP, 460 volt, 3600 RPM, TEPCsctor

A-4

Ml9aiAMma]& MC BTJUTPMEHT, Oaritinued

2 - Harrisburg pumps 2 x 3 x 12 each with 30 HP, 460 volt, AC 1800 RM TEFC motor for drilling water

1 - Sm saner treatment unit for 50 persons

1 - Air compressor unit with 2 a ir compressors driven by 125 HP electric motors - 984 C.F.M. I 125 psi

1 - Diesel cold start up compressor

2 - Hud mixing pumps, Harrisburg 6 x 8 x 3 with 75 HP, 460 volt AC,

1200 RPM TEFC motor

2 - Hud charging pumps, Harrisburg 6 x 8 x 3 with 75 HP motor

2 - Pumps for de sand ing, desilting and nud cleaning

2 - Pressure sets, ons for sanitary water and ona for potable water

2 - Welding nachines

1 - Fuel o i l transfer system

2 - Beebe Bros, air hoists 7,000 lb. line pull at 100 psi with 24 in. drum un r ig floor

1 - Meco Model PEE 300 M3B vapor compressor distillation plant

QUARTERS Air conditioned quarters for personnel plus s hospital room with three bunk capacity. The galley i s equipped with modern electric appliances. A large recreation room i s equipped with color television, card table and confortable chairs for off duty personnel.

The laundry i s equipped with s commercial type washer and dryer for conveniences of the crews.

CXMtJaCATION

A gaitronic telephone system is installed to provide conrnunication throughout the platfora.

1 - Ship-to-shore radio

1 - Single side band radio

SAFETY EQUIPMENT

2 - Watercraft 58 passenger enclosed l i fe boats

A-5

3 - 10 Han l i f e floats

67 - Ufe preservers

1 - General Alarm System

14 - 151 C0 2 Typs B-C portable f ire extinguishers

12 - 51 Chemical Type A-B-C portable f ire extinguishers

4 - 50t Dry chemical type fire extinguishers on heliporc

1 - Fixed gas type fire extinguishing system in main AC generator room

1 - Fog signal

1 - Set obstruction lights

2 - First aid kits

1 - Utter

2 - Steel escape ladders

2 - Fireman outfits

8 - Ring buck's

12 - Hand held, rocket propelled parachutes, red flare distress signals

1 - Shoulder type line throwing gun

RENTAL EQUIPMENT

1 - Centntinc, uni t

1 - Electric logging unit

A-6

TENNECO OIL EXPLORATION I PROOUCTION (CdUPAtiVI

INTEROFFICE COMMUNICATION

TO EASTERN GULF DIVISION DATE JULY 5, 1984

FOR 0. G. MCWILLIAMS

FROM J . C SHANK

RE SHALLOW HAZARD SURVEY - SHIP 3HCAL BLOCK 97 SURFACE LOCATIONS FOR WILDCAT WELLS

Surface Locations:

The surface locat ions l i s ted below are ones which are separate; a l l other locations come from one of these:

#A Location: 4,500* FSL and 6,050' FWL of Ship Shoal Block 97 #H Location: 3,000' FNL and 3,700' FWL of Ship Shoal Block 97 #L Location: 2,250' FNL and 2,000' FWL of Ship Shoal Block 97 #M Location: 3 100' FNL and 5,800' FWL of Shi? Shoal Block 97

Geophysical Data:

Multi-sensor high resolution geophysical survey by Intersea Research Corporation fo r Tenneco Oil Company.

1. Seafloor Hazards. There are no seafloor hazards noted near the surface locatlors o f wells #A, #H, #1 and #M. Al l magnetic anomalies are to the north and east of the »A locat ion. Wells #H, #L and *M are 1n the n o r t h * * * ' quarter of the block and do not have any magnetic anomalies w i th in 1,500' of any of the locations.

2. Shallow Sediment Hazards. Tlie surface locations He in an area clear of obvious amplitude anomalies. The closest one 1s to locat ion #M which 1s 200' west from an anomaly. Although shallow gas 1s noted on sub-bottom pro f i le r and sparker records, 1t 1s Hkely biogenic and low 1n pressure.

3. Archaeological Features:

The Cultural Resource Service's report Included wi th the shallow hazard survey s tates that no archaeological si tes or features are present on bloclc 97. There are numerous scattered magnetic anomalies located on the block to the no'th and east of the #A well locat ion. These are also scattered around the #H, #L and #M well locat ions.

Conclusion

The proposed surface locations are acceptable and considered safe to d r i l l .

JCS:JCF:kmd cc: Shallow Hazard Distr ibut ion

1

•VL* 0* mtneo

Y IC IW I TY MP f 86

Y ' M . T Q T St '

Oil

OCS-G-S7 37

BLK. 97

YtT I , T 4 S . i t '

no

VICINITY SHEET

• CALC

PROPOSED MINERAL DEVELOPMENT SHIP SHOAL AREA BLOCK 97

OULF OF M E X I C O

APPLICATION BY TENNECO OIL COMPANY LAFAYETTS, LA,

Tht Summary of Exploratory Wells, tht Structure Naps and tht Schtmstlr Cross Sections art considered proprietary dau to be axaUt f £ ? 5 t

AIR QUALITY CALCULATI0W8 TPfWECO OIL COHPAJfT

EXPLORATION

SHIP SHOAL. BLOCK 97

WILLS A-M

Emission calculations srs baaed upon ths dril l ing of thirtsen exploratory

wal ls . Operationa ara scheduled to begin during tha second half of 1944

aad extend Into 1986. Approximately 370 daya of trouble free dri l l ing wi l l

be reouired. During thla period tha dri l l ing rig is expected to consume

an average of 1.300 gallons of fuel dally. Details of tha calculations ara

shown in Tsblee 1-3. A l l projected emissions are belov tha ssMtlssmmi and

thla operation i s therefore exempt.

1

TABLE 1

PROJECTED AIR EMISSION WELLS A-M BLOCK Ship Shoal 97

TAKEOFF PDBL OGN-RUNNING 4 LAND- SUMPTION EMISSION FACTORS EMISSION FACTORS PROJECTED EMISSION

EMISSION SOURCE TIME/SAY INGS/DAY GALS/DAY POUND/1,000 CALS. AIRCRAFT TAKEOFF 4 LANDINGS 1 - p A * PROJECTION IN » S02 NOx CO TSP VOC S 0 2 N0X CO TSP VOC S C 2 N0K CO TSP VOC

DRILLING RIG 24 hra 1500 31.2 469 102 33.5 37.5 46.fi 704 153 30.3 56.3

CARGO BOAT 2 h r 8 4 3 l ' 2 4 6 9 1 0 2 3 3 5 3 7 , 5 ° - 1 1 , 9 0 , 4 0 , 1 0 , 2

(Dl BERTH)

CREW BOAT 2 "re 4 3 1 - 2 4 6 9 1 0 2 3 3 5 3 7 ' 5 0 A 1 ' 9 ° ' 4 ° * 1 0 2

(IN BERTH)

HEUOLFTER TAKE- 4 * 1 8 5 7 5 ' 7 * 2 5 5 2 0 , 7 2 ( 3 2 3 1 , 0 2 , 0

47.7 710 177 51.5 58.7 1-DAY TOTAL

ABOVE NHaBHBS IN FOUNDS

Projected emissions ara bssed oa date from "Compilation of A i r Pollutant Emission Factors", 3rd Edit ion AP-42, EPA, 1977. Table 3 .3 .3 . -1 aaa Table J.I.1.-3.

* TABU 2

AREA ship shoal BLOCK 97 WILLS A-M

PROJECTED EMISSIONS FROM EACH SOURCE

BY AIR roiLuTAHT FOR l l ^ T 9 6

YeoT DRILLING OPERATIONS - WELLS

SOURCE AIR POU JfTART (T/YR) SOURCE SU2 "Ox VOC

Dri11 in* Rig Projected Emissions lb/day 46.8 704 153 30.3 56.3

Transportation-Cargo Boat, Crew Boat, A Hellcooter lb/day

0.9 6.1 23.8 1.2 2.4

SUB-TOTAL lb/day 47.7 710 •177 31.5 58.7

Miscellaneous

Sub-Total 11.9 178 44.3 12.9 14.7

TOTAL in lb/day 39.6 888 221 64.4 73.4

TOTAL ln Tons/year 10.9 162 40.3 118 13>4

TABLE 3

ABBA Ship Shoal BLOCK 97 WILLS A-M

BXBMFTIOW CALCULATIONS

B - 3400 (D2 /3) for carbon monoxide

B • 33.3 D for aulfur dioxide, nitrogen oxides, total suspended particulates, and volatile organic compounds

D • 20 Statute Miles

I • 23,044 CO

• • 666 SO], NOx, TSP, and VOC

1985 HIGHEST YEAR

POLLUTANTS "B" ( T / Y R . )

PROJECTED EMISSIONS ( T / Y r . )

EXEMPT

80s 666 iC 9 yes

NOx 666 162 yes

CO 25044 40.3 yes

TSP 6<-6 11.8 yes

VOC 666 13.4 yes

B • alia emission exemption amount exprested ta tone per veer.

D • The distance of the facility from the closest onahore area of a state expressed in statute miles.

REPORTING OF OIL bPILLS OR SPILLS OF HAZARDOUS MATFRIALS

OCS LEASES

The following governmental agencies will be notified depending on the amount s p i l l e d : (ALL SPILLS UILL BE REPORTED)

LESS THAN 6.3 BARRELS: U. S. Coast Guard immediately, M.M.S. orally w1th<n twelve (12) hours and orally the Louisiana Department of Conservation I f sp i l l endangers the coast Une. Confirm oral reports 1n writing on sp i l l report form.

OVER 6.3 BARRELS: U. S. Coast Guard, M.M.S. 011 and Gas Supervisor, M. M. S. District Supervisor Immediately and orally. Orally to the EPA Regional Administrator, Louisiana Department of Conservation, and Louisiana Stream Control Commission. Confirm a l l oral reports In writing on sp i l l report form.

A l l s p i l l s shall be reported to the U.S. Coast Guard immediately. Spi l l ; less than 6.3 barrels shall be reported to the appropriate M.M.S. District Ofilce in the following mcnner:

If the spill occurs during the daylight hours of 7:00 A.M. through 5:00 P.M. Monday through Sunday, call their office and report sp i l l to the radio operator. I f the sp i l l occurs at night, report spi l l the following day.

I f the spill 1s 6.3 or more barrels, notify the appropriate Distr ict Supervisor Immediately. Their answering service wil l give you their number.

The Infomation required by the governmental agencies 1s:

Location of s p i l l , date and time spi l l occurred, amount and type material lost, cause of Incident and corrective action taken, size of s l i ck , coloration, direction of movement, and weather conditions.

I f sp i l l 1s direct result of a load-out Incident, the additional Information w i l l be required:

Name of Captain, his home address and telephone number, Z Carj Name, call sign and agent.

Chemical dlspersents wi l l not be used on s p i l l s prior to obtaining approval from the appropriate governmental agencies.

EQUIPMENT

Tennecc 011 Coinpany 1s 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 companies' equipment that 1s available fo r use by other members.

Clean 6u1f Associates has a major base at Grand I s l e , Louisiana and a sub-base at Houma, Louisiana.

A l l procedures and equipment are designed to be in compliance with OCS Order #7 (Pol lut ion and Waste Control) . Equipment to be used would mainly Include the fo l lowing:

I . FAST RESPONSE, D-MOUNTED SKIMMER SYSTEM

A. Nearest Location - Houma, Louisiana B. Response Time - Two (2) hours load-out, six (6) hours

t ravel • 8 hours C. Personnel Required - Four (4) men per s h i f t

I I . BARGE-MOUNTED. HIGH VOLUME. OPEN SEA SKIMMER SYSTEM

A. Nearest Location - Grand I s l e , Louisiana B. Response Time - Two (2) hours load-out, e ight (8)

hours travel • 10 hours C. Personnel Required - Thirteen (13) men per s h i f t

I I I . HELICOPTER SPRAY SYSTEM

A. Nearest Location - Grand I s l e , Louisiana B. Response Time - One (1) hour load-out, two (2) hour travel

• 3 hours C. Personnel Required - Two (2) men per s h i f t

oowtu "una mmmem COMPARATIVE PRODUCTS

DMC 1

Deecr ip tkx Dowe* Fkud Ssnsoss

wtco^ Baroid Magcobar MSchem piHiiary Application

DAJLIJNO. FiiMb kbbmvti Barite DOW Bar IMCO Bar Baroid Magcobar Mil-Bar For increasing mud weight

Ber t ->nite DOW Gel IMCO Gel Aquagei Magcogei Mil-Gel Viscosi ty and f i l trat ion control m wate: base muds

A t tapu lg i te DOWCeGel IMCO Bnnegei

Zeogai Salt Gel Salt Water Gel

Salt water viscosifier

DISPERSANTS

S o d i u m A c i d Pyrophosphate DOWSapp Sapp Sapp Sapp Sapp Thinner for low pH

fresh-water

S o d i u m Tet faphosphate DOW Phos IMCO Phos Barofos Magco

Phos Oil Fos Thinner for low pH

fresh-water

M o d i f i e d Tannm Desco Desco Desco Desco Desco Thinner for fresh-water snd salt water muds alkalized for pH control

P rocessed L ign i te DOW Lig IMCO-L ig Carbonox Tannathm Ligco Dispersant. emulsifier and

supplementary additive for fluid loss control

Caus t i c tzed L ign i te DOWCebg IMCO Thin CC-16 Caustihg Ugcon Caustic lignite dispersant.

emulsifier. and suppiemen-t »ry fluid-loss additive

M o d i f i e d L ignosu l fonate DOW Experse IMCO VC-10 Q-Broxin Spersene Uni-Cal Dispersant and fluid-loss

control additive for water-base muds

FLUID LOSS CONTROL AGENTS

Pregelatunnad S ta r ch DOWCeloid IMCO Loid Impermex My-Lo

Je l Miistarch Controls fluid loss in

saturated salt water, l ime and SCR muds

S o d i u m Carboxy M e t h y l Ce l l u l ose

DOW CMC

(Regular)

IMCO CMC

(Regular)

Cel lex

(Regular;

Magco CMC (Regular)

Miichem C M ° (M is)

For fluid-loss control and barite suspension in water-base muds

S o d i u m Carboxy M e t h y l Ce l l u l ose

DOW CMC

(Hi-Vis)

IMCOCMC

(Hi-Vis)

Cel lex

(H.-Vis)

Magco C»«C (Hi-Vis)

Miichem CMC (Hi-Vis)

ro t [ i U r M M control snd viscosity building in low soiids muds

Po lyan ion ic Ce i lu toe ic P o l y m e r

Onapac Drispac Drispac Drispac Drispac Fluid-loss control additive and visrosif ief in salt muds

OOWILLFLUIO COMPARATIVE PRODUCTS

DMC-2

Ooemljtukl « i O O ^ iiggefloar Mftctwn rrtiiuu. rn.an.gu,,

L> i i ? : I>>::II.:»;»/? '

Polyantonfc CeSutoeac Potjenyr

5 Drispac SupsrLo

Drispac Drispac Drispac SupsrLo SupsrLo SuparLo

Oriapec SuparLo

Mi 1 -* ' • i l i M l h ^

rnmery nmo-toss auonn^, sscondary viscosifier In asst muds

LUBRICANTS, DrTOWENTt, O a W a * » M , tURPACTANTm, DfTOAetCAS

Hydrocart> MS Softs* Softax Sottas Sottas • ~

Used In wati lower downh sno mwwnm

ir bast muds to oie fluid loss i heaving shale ft DOW

WaHKots IMCO StabilHoie Holacoat

m-wD Lubricant and Jluid-toss reducer for mater b u s muds that contain no diesel or crude oil

CMISoMibU DOW 1 WallFree

IMCO Skot-Free Pipe Lax rreepipe

Petrocote NonweKjnte* spotting to fr stuck pipe

flUjf£*.ituiiy

Blend of fl BMBBj eus •ndasphe

my

Sic* 1** DOW Sack Sd IMCO Spot SF 100

Invert emulsion that may be weighted to de-- 1 » -4 I A - . a — — — , —

sirrc aansiiy ror spontng f • • • r l l f l e i e n t l e i l s i i

I D TTWQ aiTTWrBnil*sl iy

etuokpsse

DOW DMD IMCO MD Con Del DD 1 j l l nil • ••!

MO Used in waa to drop sand

ir-bsse muds

•no Misasff iien on-owing

An Organic Entity Neutralized with DOW Amines BloLube

IMCO LubrtKieen

TorqTrtm 0084 Mil-Plaie 2

Supplies move lubricating r u n L I I » r t l — • | k u « ^ i l — i J l h i i t

propenies man wis wimoui environmental pollution

Liquid Surface Active Agent DOW

Defoamer IMCO Defoam-L

Defoamer for water-base muds

LOST CIRCULATION MATERIALS Fibrous Material DOW Fiber IMCO Fiber Fibertex Mud Fiber Mil-Fiber FMler as well as matting

material Nutshells:

Fine DOWPLG-F IMCO Plug Wall-Nut Nut-Plug Mil-Plug Most often used to prevent lost circulstlon

Medium DOW PLG-M IMCO Plug Wall-Nut Nut-Plug Mil-Plug Ueed to regem lost circulation

0OW1LL FIWO COMPARATIVE PRODUCTS

DMC-3

Dowe* Fluid IMCO Description services senecee Baroid Msgootosr Maohem Prtmary Application L06T CIRCULATION laATEPttALa front) fmAShsAe: DOWPIOC IMCO Plug Wel Nut Nut-Plug Mil-Rug Used where large crevices

or fractures are encountered Ground Mica:

Rne DOW Mica IMCO Myca Ike aliii Msgoo- Milmica Used for prevention of lost circulation

Coarse DOW Mica IMCOMyc. Micatex Magco-Mtaa

M i i m i c a Used to regain lost clfcuksaon

Combination of Kwikssel Kwlkseal Kwix-Seai Kwik-Seai Kwik-Seal Used to regain lost circulation

and fibrous

venous sizes In one seek

CORROSION INHIBITORS

aaammHHemm s m m m H H Riming Amine DOW FilmKoto

A Catalyzed Sodium Bisulfite DOW Oxben S-10 Oxygen Scavenger

SPECIALTY PROOOCTS

Bentonite Extender Benax . lex

inc issues view of bentonite 1 • j ' • • * * m e ^ « e e v w e e ' S A & A M M i i a i n i aeaaea-aawsaaaeaBi IO lOfTTl VfjTfy IUW M e l drilling fluid

OIL-MUD AOOfTTVES r r i i t M B f y

Emu*s*nec D O W E M A snd DOW EMS

IMCO Kenol-S<L) and IMCO Ken-X Conc.HU

Invermul VeftoN Carbo-TeotO) end Carbo-TeoW

Prtmary additives to form

Viscosif ier Gelling Agent DOW PreGel IMCO Ken

Gei and IMCO Ken-X ConeJ2

Gel-Tone VG-09 and Petro-Tone

Carbo-Gei

f ^ , r , . t u r n -* — -

eiuviTes vTscoeny weight suspension and rut rat ton control

Stabilizes Borehole Conditions 00W

Premulx IMCO VR

otaoiiues running anew. Improves emulsion, weight suspension, and fluid loss tjnder high temperature conditions

This mud f t a non-oil base mud and 5TTI be treated prior to disposal Into the Bul l .

COASTAL ZONE BiMBBg

(WiSISTCIICY CERTIFICATION

EXPLORATION PLAN Typ* of PUn

SHIP SHOAL BLOCK 97 Area and Block

OCS-6-6737 Lease Matter

The proposed activities described In detail In this Plan comply with

Louisiana's approved Coastal Management Program and will be conducted

1n a manner consistent with such Program.

Arrangements have been made with the Stote-Times in Baton Rouge,

Louisiana to publish a public notice of the proposed activities no

later than July 26, 1964.

Tenneco 011 Company Lessee or operator

J .L . 6regory r \ j U Vice President J I JX*

••Official Certifying W A c ^ l 7 * ) BSWSAU SMMOKNT Ksncc

July 12, 1984 JUL 12 1984 D i t f

mm ANP rfooucnoN

ENVIRONMENTAL REPORT

EXPLORATION

SHIP SHOAL AREA, BLOCK 97

TENNECO OIL COMPANY

Exploration & Production

Lafayette, Louisiana

contact parson

Don LeBlanc P. 0. Box 39200

Lafayette* Louisiana 70503 (318) 269-7781

July 9, 1984

prepared by

MERIDIAN RESEARCH CORPORATION Box 3804

Lafayatta, Louiaiana 70302-3804

(2) D18CKIPTI0II OF PROPOSED ACTIOII

(A) TRAVEL MODES AHD BOOTES

Tenneco Oil Coapany plana to conduce exploratory dri l l ing oa Ship

Shoal Block 97. Aa aany aa 13 walla aay ba raquirad to fully evaluate tha

potential of thia Block. Operations ara expected to begin during tha laat

hal f of 1984 and cc extend into 1986 if a l l walla ara dri l led. Onahore

support will be provided froa Fourchon, Louiaiana.

I t is estlaatad that a craw boat wi l l make a dally round trip eo tha

Block and a supply boat a round trip evei r othar day. Two round trips daily

ara l ikely for helicopters. Boat traff ic w i l l ba directly to tha Oulf and

the projert Block froa Fourchon. Helicopter t r a f f i c ia noraally by tha aost

direct route froa tha baaa to tha Block, weather and traff ic condlcions

paratttiag.

(B) SUPPORT BASE

Tha support base w i l l be the Tenneco fac i l i ty at Fourchon. Louisiana.

Thla baaa occuplea a 7.5 acre sice with 624 feat of water frontage. Fac i l i t i es

include water, dieael fuel , gasoline, lubricants, marine and industrial

cleaners, and a 65 ton crane and warehouse. These fac l l l t l ee ara considered

adequate to support the operations planned with no additional personnel or

expansion of physical f a c i l i t i e s .

(C) M1W RJFFOtT FACILITIES

Mo nev onshore support faci l i t ies such aa new land bases, ref ina r la a,

atorage facll lt lee, puaplng stations, boat docks, helicopter pads, or

fuel ing facllltlee are expected to be raquirad. Tha present onahore fac l l l t l ee

are considered adequate to handle any new hydrocarbons that aay be found

without substantial alteration or expansion.

1

(D) WW TKCWIQUES OK OTCUSUAL TECHMOLOCT

No M V techniques or unusual technology ia expected to ba required

for tha exploration act iv i t ies planned for llock 97.

(K) Haft Of PK0P0SKD ACTIVITY

Loulalana la tha only affected atate. Ko pipelines or other oU/gas

related facil it ies have been Identified ln Block 97.

( ? ) TKAKSrOKTATIQM OF OIL OK CAS

Aay hydrocarbons found on Block 97 ara likely to be transported to

shore through connectiona vith tha offshore pipeline network In the immediate

v ic in i ty .

(3) DESCRIPTION OF THE AFFECTED EIIVIKOawfJrT

(A) PKTilCAL AMD PTVIRflaMCTTAL

(1) Coaaerclal Flah ing

Coaeerclal f lahir. w off tha coaat of Loulalana la cantered oa the harvest

of menhaden, shrimp, unclassified Industrial bottomfish, and reef type fishes

much as snapper and grouper. Loulalana normally laada tha nation in tha

tonnage landed end rank a near the top In tha value of tha catch. Tha

fisheries extend froa tha shallow baya and inlets to tha edge of the continental

shelf at a depth of approxiastely 600 faat.

Menhaden are a achoollng apeclas found near tha coaat and generally

taken ln waters of 30 feet or lees ln depth and within 12 to 13 miles of shore.

Block 97 has water depths lr the 18-34 foot range aad l ias about 20 a l ias

froa the naaraet land. Thus lt Ilea Juat seaward of tha menhaden fishery.

Consequently, nc lapacts are axpectad.

shrimp are taken in large quant l t lea f~oa the coaetal end ialand water a

to approximately the 100 foot depth contour, beyond thie point to the edge of

2

the continental ahelf at about 600 faat, tha catch la much smaller. Water

depths over llock 97 placa l t within tha prime shrimping grounda. Tha Loulalana

shrimp catch usually averages between 35,000,000 and 100,000,000 pounds

annually (head. on). Tha 1982 catch totaled 90,530,000 pounds ("The Fish

Boat", August, 1983). The total catch during any given year la related to

water temperatures and salinity conditiona during the spring ln the Inland

veters. At this tiee the harvest Is considered to be at i ts maximum sustainable

level . The dr i l l ing act ivi t ies planned for Block 97 v i l l result in the temporary

renoval of up to f ive acres of seabottom froa that currently available during

tha drilling of each wel l . This area removed la ao amall ln relation to tha

area remaining available that no detectable impacts ara forseen to tha shrimp

harvest.

Unclassified industrial bottomfish ara harvested by bottom trawls

ard sre used aa pet food, f er t i l i s er , and in some caaaa for human consumption.

Block 97 l ias v e i l within thia fishery. Again, up to five acraa of seabottom

wi l l be teat, id froa that available to these fishermen on a temporary baala

during the dr i l l ing of each wall. However, this fishery la an under util ised

fishery and combined with tha small area of seabottom removed, should not

be measurably impacted by the exploratory dri l l ing.

There is an Important hook and line fishery ln thia area for many spec lea

that frequent hard bottom environments or the underwater portions of production

platforms. Neither set of conditiona ara fou.J in llock 97. Consequently,

fishing actlvltlee are considered to ba minimal ln thla l lock. Should a

discovery occur, and ona or more platforms ba set here, the environment could

ba enhanced for apeclea such aa tha seatrouts, redflah, sheepshead, flounder,

aaa catfish and mackerel. Tha water depths ara marginal for snapper and grouper.

3

Vo impacts to this fishery sre anticipated unless a discovery i s eada and

platfora(s) sat in Block 97. Should that occur* tha a r t i f i c i a l reef function

of these structures should enhance the Block for hook and line fishermen.

(2) Shipping

There are no shipping fairways, anchorage, araaa. or transit zones

on or in the immediate vicinity of Block 97.

(3) Recreation

The primary recreational activity off Louiaiana la sport fishing sad

acme diving. This act iv i ty is usually concentrated around hard bottoms

(snapper banks) or production platforao. Neither of these conditions ara

found on Block 97. Consequently, recreational usage is considered to be

l ight . Should a discovery occur. -\» noted above, thla Block could be enhanced

for certain species nought by both crvwearclal and recreational fishermen

ualng hook and line methods

(4) Cultural B> ources

A cultural re source a analyala of tha data gathered for Block °7 ••»<

made by Roy B. Pettua, Marine Archeologist. Thie Block Ilea in the aree of

sery highest probability for archeological eltes tnd nearby Blocks ara known

to have aites of one type or ar othar. A vary careful analyala oi tha data

was made both for surface (modern) anu subsurface (prehlatorlcel) sites but

none could be found and subbottom conditiona did not appear favorable for

tha existence of such eltaa. Consequently, no limitations vara suggaatad

for tha actlvltiaa planned for Block 97.

(5) Ecologically Sensitive Pastures

No ecologically sensitive featuraa have bean identified on or ln tha

Immediate vicinity of Block 97.

4

(6) Pipelines and Cables

No pipelines or cables vera identified on Block 97 during the analysis

of the shallow hazard data.

(7) Othar Minerala

There are no known plans at this time for tha development of minerals

other than hydrocarbons for Block 97.

(6) Endangered or Threatened Species

The coastal watera off Louisiana are uti l ised to some degree by five

endangered specie a of whales* three endangered species of sea turtles* and

two threatened spec lea of sea turtles. The endangered species are the blue

vhal«, sal wtala, sperm whal . finback whale, humpback whale. Atlantic

ridley turtle, hawksbill turtle, and leatherback turtle. Threatened epecles

Include the loggerhead and green sea turtlee. Of the whale species, the sperm

is perhaps the moss common ln the Gulf of Mexico and the blue whale tha

least common, with only two sightings of the latter having been reported.

The other three species of whales aay be considered uncommon in the Gulf*

although the humpback waa once hunted commercially in the central Gulf during

the 19th century (Schaldly, 1981). The leatherback ia believed to prefer the

deeper oceanic watara while the other uncles of turtles are considered to

be more coaatal in nature. Thus the leatherback la unlikely to appear ln

Block 97 dua to the shallowness of the water whereas the otner epecles of

turtles may be present here at one time or another. Whales are found moat

frequently ln tha deep watara ln tlie v ic ini ty of the continental lope and

are thus unlikely vlal tors to Block 97.

General over exploitation of both turtles and whales for food and other

produces has been the major cause of their decline. A few nations s t i l l harvest

5

whales and turtles are s t i l l taken in aany parta of tha world. Additionally,

turt laa are often k i l l ed when they become trapped in fishing nets and a»e

unable co surface for a i r . Their nesting grounds are often disturbed and

the eggs are sometimes harvested for food. New evidence indicates that turtlaa

• r e being killed by the Ingestion of plastic trash, that whan floating ln tha

water, appeara to resemble Jellyfish (a favorite turtle food).

Support vessel movements and dri l l ing activit ies may cause a limited

disturbance to any turtlaa or perhaps whales that might venture Into the

v i c in i ty . To date, no sc ient i f ic evidence haa been found that would Indicate

that this type of disturbance has been significant in the decline of turtle

and whale populations. No significant or permanent impacts are foremen to

endangered or threatened species aa a reault of the exploratory dri l l ing

planned for Block 97.

(4) UNAVOIDABLE ADVERSE IMPACTS

Gallaway (1981) completed an extensive review of petroleum related

ac t iv i t i e s in the Texas-Louisiana continental shelf region. Potential negative

impacts addressed by him ware discharge of d r i l l cuttings, dr i l l ing f luids,

o i l sp i l l s , and produced formation watera.

Dri l l cuttfe&e are small fragments of the formation cut by the d r i l l

b i t and discharged Into the water on a continuous basis during the dri l l ing

of each wall. The larger cuttings tend to move directly towards tha bottom,

and in shallow waters ara l ikely to accumulate on the aeafloor ln mounds

or piles. In greater water depths, or where wave and/or current action are

vigorous, the materials may be spread to tha extent that no mounds develop.

When a pile accumulates, any immobile benthic organisms trapped beneath lt

w i l l another. Over time, plants and animals w i l l colonize the mound and the

6

"

seafloor will return to a condition similar to that in exlatence before

d r i l l i n g began.

Large-scale discharge of dri l l ing mud occure on an average of 8-10

times during the dr i l l ing of each v a i l . Also, as the cuttings ara discharged,

soma mud v i l l be entrained on them and v i l l wash free as tha cuttinga dri f t

towards the bottom. The clay particles in tha dri l l ing fluid tend to flocculate

on contact vith salt water, and along with the finer d r i l l cuttings, form a

turbid plums downetrsaa from the d r i l l r i g . When a large-scale release

of mud occurs, thla plume may reach down-current for a distance of up to

3,200 feet before l t i s completely diluted. The toxicity of the cuttings

and the drilling mud components la very alight and there la l i t t l e Impact

on water quality. The primary effect ie a reduction of light penetration

which may reduce primary production by phytoplankton.

The briny water from the formation being exploited Is tha primary

affluent discharged from production platforms. Since the act ivi t ies planned

for Block 97 are for exploration, there is unlikely to be any discharge of

• a l t vater except during tha testing of each well. Any amounts released

at thla tine would ba amall in qi< ntlty and of limited duration in terms

of time. These watara have been shown to be slightly toxic within a few

yards of the point of discharge. No adverse impacts have been shown to

occur to the marine l i f e beyond thia zone in the open Gulf. Theee waters

• r e usually high in tha concentration of inorganic salta and have very low

concentrations of hydrocarbons and other organic compounds.

An area of seabottom of up to five acres wi l l be temporarily removed

from that available to fishermen using bottom travls during the dri l l ing of

each vei l . The aree removed ia ao amall in relation to the areas remaining

7

open, that no detectable Impacts to the shrimp or bottomfish catch is foraeen.

O i l sp i l l s are always a poaaibility, however, good industry safety practices

combined vith a strict adherence to applicable rules and regulations has

greetly reduced the chance a of a damaging a p i l l . In fact, dri l l ing and

production activities are now considered a minor source of the total

hydrocarbons found in the Culf waters. More o i l Is added to the Gulf from

the flow of the Mlaalsaippl River than from OCS o i l and gas operationa.

In summary, unavoidable adverse impacts are considered to be minor

and temporary. They w i l l be confined to the lame' I La dri l l ing area. Nc

major or permanent damage to the marine environment or to nan's use of lt

ln anticipated froa the exploratory dr i l l ing p] nned for Block 97.

3

(5) REFERENCES

•right, T . J . , emd 1. toss* 197* "Fishing Banks of ths Texas Continental Shelf", In: Bul l i s .

I . t . . J r . , and A.C. ISMS, ads. Froeaadinsa: ColloqulM on Snappar-Crovar Fishery ta source a of Tha Western Central Atlantic Ocean. Texas A 4 M University Sea Grant College, Miaeiaalppl-Alabama Baa Grant Consortlua, aad Florida Saa Grant College Prograa. College Station, Texas; B l lux l , Mississippi; and Gainesville, Florida.

Christmas, J . T. and D.J . Btaold 1977 "Tha Menhaden Fishery of Tha Gulf of Mexico, United States:

A Regional Management Plan". Culf Coaat Re search Lab. . Ocean Springs, Miss.

Conant, R. 1973 A Fleld Guide to Reptilea and Aaphiblana of Eastern and Central

Worth America. Houghton Miff l in Company, Boston.

F r i t t s , T.H. and R.P. Reynolda 1981 "Pilot Study of The Marine Mammals, Blrda, and Turtlee in OCS

Areaa of tha Gulf of Mexico", US Flah 4 wildlife Ser. , Office of Biological Services, Washington, DC. FWS /OBS-81/36.

Gallaway, Benny J . 1981 An Ecosystem Analyala of Oi l and Gaa Development on Tha Tsxae-

Louiaiana Continental Shelf. US Flah & W.ldllfe Ser. , Office of Biological Services, Vsshington, DC, FWS/OBS-81/27.

Gallavay, Benny J . , and G.S. Isabel 1982 The Ecology of Petroleum Platforms ln the Worthveaterr, Gulf of

Mexico: A Community Profile. Bureau of Land Management and US Fish 4 Wildlife Ser. , Biological Services Program, Washington DC, FWS/OBS-82/27.

LGL Ecological Research Aesociatae, Ine. 1983 Ecological Effects of Energy Development on Reef Flah of The

Flower Garden Banka. Prepared for National Marine Fiaheriea Service, Galveston, Texaa.

Lovery, G.H., J r . 1974 The Mammala of Loulalana and ite Adjacent Watara. Loulalana

Stata University Preaa, Baton Rouge.

Mumphrey, A . J . , J r . , aad C D . Carluccl, J r . 1978 'Environmental Planning for Offshore Oil and Gaa". Volume

Ft Regional Status Reporte. Fart 3: Gulf Coaat Region. The Conservation Foundation, Washington, DC. US Flah 4 Wildlife Service. Biological Services Program, FWS/OBS-77/61.3.

Schmidly, David J . 1981 "Marine Mammals of the Southeastern US Coaat and The Gulf of

Mexico". US Flah 4 Wildlife Service, Office of Biological Services. Washington. DC, FWS/OBS-80/41.

(6) B iaBg

TM proposed ac t iv i ty w i l l ba carried out and completed with the

guar an tat ef the following i t east

(a) Tha Met and safest techniques wi l l he u t i l i s e 4 throughout the pro­

j e c t . This includes meeting e l l applicable requirements fer equlpMnt

types, general project layout, safety systems end equipment aad monitor­

ing systems.

(b) a l l operations w i l l he covered by a Minerals Management Service

approved oil s p i l l contingency plan.

(c) A l l applicable Federal , atate, and local requirements regarding air

emission snd water quality and discharge for the propoeed act iv i t ies , aa

well as any other permit condition, wi l l be complied vleh.

Sme Grant Collega 1980 Draft Environmental lapact Statement and Fishery Management

Plan and Regulatory Analyala and Proposed Regulations, Reef Flah Resources of The Gulf of Mexico. Gainesville, Florida.

tooth Atlantic Fishery Managenent Council 1979 Fishery Manaaeaent Plan for The Atlantic B11lfIshest White

Merlin. Blue Marlin. Sa i l f i sh . and Spear f i sh . Miami. Florida.

Southeast Fisheries Center 1978 Fishery Manageme.it Plan for Ground fish (Culf of Msxlco).

Prelim. Draft , Mat. Marine Fisheries Bar. . Miami, Florida. • US Department of Commerce

1980 Final Environmental Impact Statement for The loulalana Coastal Resources Program. Office of Coastal Zone Mgt., Washington. DC.

US Department of Commerce 1980 Fishery Stat le t lca of Tha united Statee 1976. NOAA, Statiatical

Digest no. 70, Washington, DC.

US Dapartmant of Commerce 1980 Marina Recreational Fishery Statiatica Survey. Atlantic and

Gulf Coaate. 1979. NOAA. Currant Fishery Statletlca. Mo. 8063. Washington, DC.

US Department of The Interior 1982 Draft Regional Environmental Impact Statement. Gulf of Mexico.

Minerals Management Service, Metairie, La.

US Department of The Interior 1982 Final Supplement to Final E I S , 3 Tear OU and Gee Uase Bale

Schedule, Jan 82 - Dec. 86. Minerals Management Ser. , Metairie, La.

US Department of Tha Interior 1963 Draft E I S . Culf of Mexico. (Uaae offerings! Central Gulf A

Western Gulf, 1984) Minerals Management Bar., Metairie, U .

van Loplk, J . R . , K.H. Druxeaond, snd t . E . Condrey 1979 Draft Environmental Impact Ititemont 4 Fishery Management Flan

or the Snrlmp Fishery of the Gulf of Mexico. US Waters. Center or Wetlands Resources, Loulalana Stata Univ., Baton Rouge, La.

Ward, C.H., M.E. Bender, aod D.J. Ralah, ade. 1979 The Offshore Ecology Investigation. Effects of Oi l Dri l l ing and

Production in A Coastal Environment. Rice Univ Studies, Vol 65, Vo. 4 4 5, Houston, Taxaa.