taujijb^ - bsee data center · aita. tms plsn includes the sctivities proposed for wells a through...
TRANSCRIPT
In Rsjply tefcr To: Septenber IT. 19S7
Texado USA Attention: ftr. A. Newton Post Office Box 60252 mm Orleans, Louis teas 70160
Gaatl^asn:
Reference fs aade to your Initial Plen of Exploration and Envlromsent*) Reoort received Septesber 3. 1987, for Uase OCS-6 717*. Blocs A-10. Mustang Island Aita. TMs plsn includes the sctivities proposed for Wells A through 0.
In accordance with 30 CPR 250.34. revised Oecerfcer 13. 1979. snd our lette dated January 29. 1979. this plaa 1s hereby dete rained to be cosflete snd 1s now being considered fer approvsi.
Tour plan coat rol nuaber 1s N-2732 and sliould be referenced io your coasnunica tion snd correspondence concerning this plaa*
Sincerely yours.
(Ori*. Sgd.) A. Donald Giroir
fr. Bourgeois 3 * Regions! Supervisor
- Field Opemtions
bcc: tease OCS-G 7175 (OPS-3-2) (FILE ROOM/ ( ^S-3HI,w/Puh11c Iafo. Copy of the plan snd ER (PUBLIC RECORDS)
ADGobert; eck: 9/09/87 :poeco«
taUJiJB^ IS.K1 nil BI«S
muam
Texaco USA PO Box 60252 New Orleans LA 70160
August 17,| 1987
Regional Superv i sor F i e l d Operations Minera l s Management S e r v i c e 1201 Elmwood Park B l v d . New Orleans, L o u i s i a n a 70123-2394
261971 - FEDERAL LEASE OCS-G 7175 MUSTANG ISLAND BLOCK A-10 OFFSHORE TEXAS PLAN OF EXPLORATION AND ENVIRONMENTAL REPORT
Dear S i r :
In accordance with the provisions of Title 30 CFR 250.34-1, and your letters of January 29, 197S, and October 22, 1981, we hereby submit for your approval nine copies each of a Plan of Exploration with Environmental Report for federal lease OCS-G 7175, Mustang Island Area, Bloclc A-10. Should any additional information be required, please contact Mr. D. F. Cramer by telephone at (504) 595-1249.
Your early approval of this plan w i l l be appreciated.
Yours very truly,
TEXACO PRODUCING INC.
DFC tdw POE/2 8/17/87
Attachments
PLAN OF EXPLORATION TEXACO PRODUCING INC.
FEDERAL LEASE OCS-G 7175 MUSTANG ISLAND BLOCK A-10
AUGUST, 1987
TABLE OF CONTENTS I
PAGE
EXPLORATION P
Description of and Schedule
for Exploration A c t i v i t i e s
Description of Rig and Safety Equipment
Geophysical Equipment
Location of Proposed Wells
Current Subsurface Interpretation
O i l Sp i l l Contingency Plan
Onshore Support Bases
D r i l l i n g Mud Components and Mud Additives . . . .
Projected Air Emissions Report
D r i l l i n g Hazarda Assessment
Archaeological Assessment
Lease Stipulation
Environmental Report and Air Quality Reviev
Deacription of the Proposed Action
Deacription of the Affected
Environment and Impacts
Unavoidable Adverse Impacts
References 12
Coaatal Zone Managemant Consistency C e r t i f i c a t i o n 13
Appendix
PLAN OF EXPLORATION
TEXACO PRODUCING INC.
FEDERAL LEASE OCS-G 7175
MUSTANG ISLAND BLOCK A-10
Description of and Schedule for Exploration Activities
Texaco Producing Inc.'s \ploration plan for Mustang Island Block
A-10 includes the dr i l l i n g and completion of up to four (4)
exploratory wells to evaluate federal lease OCS-G 7175 for
development. The f i r sr. well i s scheduled to commence on or about
November 1, 1987. The commencement dates for the remaining wells
have not been scheduled. Operations for the four (4) wells are
expected to last approximately 432 days.
Description of Rig and Safety Equipment
Depending on the availability of rigs, the proposed wells w i l l be
d r i l l e d with a jack-up drilling rig similar to the "Penrod Rig
No. 88." Included in the Appendix are the rig specifications for
the "Penrod Rig No. 88." The specifications for the actual
d r i l l i n g vessel and safety equipment to be used w i l l be submitted
along with the appl. 'ation for permit to d r i l l . The rig used to
d r i l l the exploratory wells under this plan w i l l contain and
maintain a diverter system, blowout-preventers, auxiliary
equipment, and mud testing and monitoring equipment. Drilling
operations will be conducted in a manner so as to maximize
p o l l u t i o n prevention i n accordance with OCS Order No. 7. A l l
o ther safety] and contro l equipment w i l l be used in accordance r
w i t h other applicable OCS Orders.
Should a well indicate the presence of commercial reserves, the
w e l l w i l l be temporarily abandoned in accordance with OCS
Order No. 3.
Geophys,ical Equipment
A l l geophysical work pr ior to the commencement of exploratory
d r i l l i n g operations has been completed. No other geophysical
work i s presently planned for the l ease . I f i t i s subsequently
detennined that addi t ional wor^ i s required, conventional CDP
r e f l e c t i o n methods w i l l be used.
Locat ion of Proposed Wells
Inc luded in the Appendix i s a V i c i n i t y Map and Location P l a t .
The V i c i n i t y Map shows the location of Mustang Is land Block A-10
r e l a t i v e to tho Texas shoreline. The Location Plat provides the
sur face and bottom hole locations, proposed to ta l depth for each
w e l l , and the water depth at each surface location.
Current Subsurface Geologic and Geophysical Interpretation
Included in the Appendix ar« the subsurface structure map and the
geologic cross sect ion which r e f l e c t the current subsurface
interpretat ion of the geologic and geophysical data in the area.
These data are considered confidential by Texaco Producing Inc .
- 2 -
and ahould be exempt from disclosure under the Freedom of Infor
mat ior Act 5 U.S.C. 552. These data are intended for use by 1
authorized Minerals Management Service personnel only.
Qil S p i l l Contingency Plan
In accordance with OCS Order No. 7, Texaco Producing Inc. has on
f i l e with the Minerals Management Service an Oil S p i l l
Contingency Plan which has been approved by the Minerals
Management Service by letter of August 27, 1986.
Texaco Producing Inc. i s a member of Clean Gulf Assoc 'ates (CGA)
and, as such, hat accesa to a stock-pile of o i l s p i l l containment
and clean-up materials for use in the offshore and estuarine
areas. There are several CGA bcsas which are stratsgically
located along the Texas, Louisiana and Florida coastlines of the
Gulf of Mexico that have the personnel, material and equipment
necessary to control and clean up o i l s p i l l s . The closest CGA
base at Rockport/Fuiton, Texas, i s within 50 miles of the
proposed d r i l l sites. Based on the distance from this CGA
installation to the proposed d r i l l s i t e s , we estimate a travel
and deployment time of approximately seven (7) hours.
Onehore Support Bases
Two onshore bases w i l l be used to support the proposed
operations; one in Corpus Christi, Texas and the Texaco dock at
Morgan City, Louisiana. From these bases personnel, supplies and
- 3 -
mater ia l s w i l l be transported by boat to the proposed d r i l l
s i t e s . Additionally, personnel may be transported to and from
the d r i l l s i tes by hel icopters which are based at Petroleum
Helicopter, I n c . ' s f a c i l i t i e s at Amelia, Louisiana and Morgan
C i t y , Louisiana.
D r i l l i n g Mud Components and Mud Additives
Included in the Appendix are l i s t i n g s of the d r i l l i n g mud com
ponents and mud addit ives which are normally used during d r i l l i n g
operations.
Projected Air Emissions Report
The projected a i r emissions report, which i s included in the
Appendix, re f l ec t s the estimated emissions of t o t a l suspended
p a r t i c l e s (TSP) , s u l f u r dioxide (SO.,) , nitrogen oxides (NO ) ,
carbon monoxide (CO) and vo la t i l e organic compounds (VOC) for a
432 day period of continuous operations. Upon comparison of the
estimated emissions to the emissions calculated using the
exemption formulas, i t was determined that the proposed
exploration a c t i v i t i e s were exempt from further a i r quality
review. Based on these data, i t has been determined that these
planned ac t iv i t i e s w i l l not cause any s ign i f i cant e f f ec t on the
a i r qual i ty of the onshore areas.
- 4 -
Drillinq Hazards and Archaeoloqical Assessment
An archaeological hazards survey was conducted over Mustang
Island Block A-10. The data collected from this survey included
magnetometer,|side scan sonar, sparker and pinger profiles.
These survey data along with avaixable CDP seismic and velocity
profiles were reviewed to evaluate the proposed d r i l l sites for
potential drilling hazards.
The information below relates to data collected irom the
following d r i l l site locations on Block A-10:
"A" % 3900' FSL & 8000' FEL of Blk. A-10;
"B" @ 6600' FSL & 6500' FWL of Blk. A-10;
"C" % 51501 FNL & 3100' FWL of Blk. A-10; and,
"D" 8 47001 FSL & 5000' FEL of Blk. A-10.
At Location "A" the water depth i s 234 feet. The sea-floor i s
f l a t and slopes to the southeast at an approximate rate of 7.5
feet per mile. There were no anomalous bathymetric features,
such as outcrops or scarps, noted. Near surface bedding i s
parallel.
Evidence of near surface faulting i s observed near the well site.
The nearest fault i f 800 feet from the location down to the
northwest. The well bore w i l l not intersect shallow faulting.
- 5 -
Shallow "bright spots" are not observed in the v i c i n i t y of the
proposed location. Another indicat ion of a shallow hazard i s 4 r
ferrous debris anomalies with the closest being 3300 feet
northeas^: and having a signature width of 60 feet. An inactive
gas blow hole i s 950 feet north of the location. CDP velocity
data indicates no shallow gas.
At Location "B" the water depth i s 230 feet. The sea-floor i s
f l a t and slopes to the southeast at an approximate rate of 7.5
feet per mile. There were no anomalous bathymetric features,
such as outcrops or scarps, noted. Near surface bedding i s
parallel.
Evidence of near surface faulting i s observed near the well site.
The nearest fault i f 550 feet from the location down to the
northwest. The well bore w i l l not intersect shallow faulting.
Shallow "bright spots" are not observed in the vicinity of the
proposed location. Another indication of a shallow hazard is 4
ferrous debris anomalies with the closest being 5100 feet
southeast and having a signature width of 60 feet. CDP velocity
data indicates no shallow gas.
At Location "C" the water depth i s 223 feet. The sea-floor i s
f l a t and slopes to the southeast at an approximate rate of 7.5
feet per mile. There were no anomalous bathymetric features.
- 6 -
I
such as outcrops or scarps* noted. Near surface bedding is
parallel. \
Evidence oj near surface faulting i s observed near the well site.
The nearest fault i f 800 feet from the locaticn down to the
southeast. The well bore w i l l not intersect snailow faulting.
Shallow "bright spots" are not observed in the vicinity of the
proposed location. Another indication of a shallow hazard i s 4
ferrous debris anomalies with the closest being 7900 feet
northeast and having a signature width of 40 feet. An inactive
gas blow hole i s 800 feet west of the location. CDP velocity
data indicates no shallow gas.
At Location "D" the water depth i s 237 feet. The sea-floor i s
f l a t and slopes to the southeast at an approximate rate of 7.5
feet per mile. There were no anomalous bathymetric features,
s . as outcrops or scarps, noted. Near surface bedding i s
par a l l e l .
Evidence of near surface faulting i s observed near the well site.
The nearest fault i f 700 feet from the location down to the
southeast. The well bore w i l l not intersect shallow faulting.
Shallow "bright spots" are not observed in the vicinity of the
proposed location. Another indication of a shallow hazard i s 4
ferrous debris anomalies with the closest being 350 feet
- 7 -
northeast anc hav ing a s ianature < i d t h o f 60 f e e t . An i n a c t i v e
gas b lov hole i s 27C0 f ee t west o f the l o c a t i o n . CDP v e l o c i t y t
data indica tes no shallow gas.
Archaeologica l Assessment
There are no known archaeologica l o r c u l t u r a l resources l o o t e d
on Mustang I s l a n d Block A-10. *»*;e probabi] I t y o f occurence a/.*
recovery of an a rchaeo log ica l resource a t the proposed d r i l l
s i t e s i s minuscule . Lease S t i p u l a t i o n
Texaco Producing I n c . w i l l comply w i t h the p r o v i s i o n s o f Lease
S t i p u l a t i o n No. 2 - B i o l o g i c a l and No. 3 - M i l i t a r y Warning Area.
DFC: tdw TOE/2 8/13/87
r
I ENVIRONMENTAL REPORT
AND
AIR QUALITY REVIEW
FOR COASTAL MANAGEMENT CONSISTENCY DETERMINATION
BY THE STATE OF LOUISIANA ON OPERATIONS
PROPOSED IN THE
PLAN OF EXPLORATION FOR
GULF OF MEXICO LEASE OCS-G 7175
MUSTANG ISLAiiD BLOCK A-10
AUGUST 1987
Prepared by?
Vincent F. Cottone, P .E .
Texaco Producing Inc.
Post Office Box 60252
Now Qrltans, LA 7C160
(504} '195- .»71
DESCRIPTION OF PROPOSED ACTION
T h i s report addresses the act ,v i t i e s prcposed by Texaco Producing
I n c . (Tpjl) for Mufctaag Island Block A-10 (O^s-G 7175). The ap
proximate location of the proposed a c t i v i t y i s presented in
F igure 1, a general v i c i n i t y map of the Outer Continental Shelf
(OCS) lease areas.
Tt i s anticipatel tacit, a jack-up d r i l l i n g r i g w i l l be moved on
the lease and four (4) explore:ory wel l s w i l l h * d r i l l e d . The
sur face location of the wells aid addit ional information regard
ing speci f ic a c t i v i t i e s proposed by TPI for th is block are i n
cluded in the Plan of Exploration (POE) to which t h i s report i s
attached.
The proposed a c t i v i t i e s w i l l be carr i ed out by TPI with a guaran
tee of the following:
1. fhe y*et a / a i l a b l e and safest technologies w i l l be u t i l i z e d
throighout tiie p r o j e c t . This includes meeting a l l applicable
rftqui remoii'-a for equipment types, general project layout,
p.af aty syswO»as, equipment and monitoring systems.
2. A l l operations w i l l be covered by a Minerals Management
Service (MMS) approved O i l S p i l l Contingency Flan.
DRAWING NOT TO SCALE
3. All applicable Federal, State, and local requirements regard
ing air emissions, water quality, and discharge for tha pro
posed activities, as well as any othr- permit conditions.
lr addition to the c r i l l i n g rig, service boats and helicopters
w i l l be used to transport equipment, material, personnel, and
su*=- ;S to the d r i l l s i t * . TPI w i l l operate the service boat:*
SUs cC support base f a c i l i t i e s in Morgan City, Louisiana and
corpus Christi, Texas. I t i s estimate that the service boats
w i l l make three (3) to four (4) trips each week from the Texas
shorebase r.ad one (1) trip each week from the Louisiana shore-
base, helicopter flights to the area wil l average one (1) trip
per week and wiT.l originate from and return to Petroleum
Helicopt.ars, Inc. ! s f a c i l i t i e s at Amelia, Louisiana.
I t i s anticipated that the transportation vessels w i l l utilize
the most direct routes from their po.\nts of rrigln. However,
because a vessel supporting the proposed exploration activities
ir^y be scheduled fo* other scops in the area, the exact route for
each vessel on each particular trio cannot be pr--determined.
A. Travel Vadas. Routes, and Frequencies
2
B. Support Facilities and New Personnel
\
The proposed a c t i v i t i e s w i l l use two (2) ex is t ing support bases,
one | n Corpus C h r i s t i . Texas and the TPI dock at Morgan Ci ty ,
Louisiana. The proposed a c t i v i t i e s w i l l not require any expan
sion to these f a c i l i t i e s . The proposed a c t i v i t i e s w i l l be accom
plished using existing employees and contract personnel. No new
employment i s expected to be generated as a resu l t of these
a c t i v i t i e s .
C. New Support Facilities
No new support f a c i l i t i e s w i l l be required.
D. New or Unusual Technology
No new techniques or unusual technology w i l l be used.
E. Location of the Proposed Activit ies
The Mustang I s l a n d area exploration a c t i v i t y i s located approxi
mately thirty-seven (37) miles o f f of the Texas coast. Figure 1
shows the location of Block A-10 i n re la t ion to the Gulf coast,
as well as the geographic re lat ionship between Mustang Is land
Block A-10 arc the other OCS leases areas.
3
DESCRIPTION OF THE AFFECTED ENVIRONMENT ANO IMPACTS
A. Physical and Environmental i
r
Commercial Fishing
Mustang Island Block A-10 i s located approximately 37 miles
from shore where the water depth i s approximately 230 feet.
This location i s within the limits of the major finfish
harvest area and inside the brown shrimp harvest area
(U.S.D. I. , FEIS, Gulf of Mexico, 1986, Visual No. 2). The
placement of a drilling rig on Block A-10 w i l l remove a
portion of the waters from use by commercial fisheries and
provide the possibility of fishing gear conflicts. Addition
ally, the waters adjacent to the d r i l l sites may become
temporarily turbid due to d r i l l i - v operations. These oper
ations should have no significant impact on commercial
fisheries.
Shipping
Mustang Is land Block A-10 i s f ree of any designated shipping
fairway or anchorage area. The nearest shipping fairway i s
approximately 3 miles to the northeast ( U . S . D . I . , F E I S , Gulf
of Mexico, 1986, Visual No. 3 ) . I t i s l i k e l y that marine
vesse l s supporting the proposed a c t i v i t i e s w i l l u t i l i z e t h i s
fairway to gain access to the support bases. However, i t i s
un l ike ly that the marine vesse l s w i l l have a s ign i f i cant
e f f e c t on fairway t r a f f i c . A l l marine vessel operations w i l l
be -in accordance with the U.S. Coast Guard's regulations re
garding navigation standards and the drilling rigs and each >
matfine vessel w i l l be equipped with a l l U.S. Coast Guard
reojuired navigational safety aids.
Small Craft Pleasure Boating, Sport Fishing and Recreation
The activities propose" in the accompanying POE are primarily
confined to Mustang Island Block A-10, which i s about 37
miles from the Texas coast and has a water depth of approxi
mately 230 feet. Many fishermen charter boats to deep-sea
f i s h and sport dive in the northern Gulf. Petroleum plat
forms in the northern Gulf provide recreation for fishermen
and scuba divers because they act as a r t i f i c i a l reefs
attracting and establishing aquatic communities including
highly sought after food and sport fishes. The reef effect
created by petroleum platforms i s well known and i s evidenced
by the numerous private boat owners who regularly v i s i t off
shore f a c i l i t i e s to harvest food and sport fishes.
Frequently, offshore rigs and platforms serve as navigation
points for small commercial and recreational marine craft.
Manned drilling rigs and platforms can also provide a haven
for small craft operators forced to abandon their vessels
during storms or following boat accidents. The installation
and use of navigational aids, lifesaving equipment, and other
safety requirements pursuant to Coast Guard regulations are
standard procedure for drilling rigs, production platforms,
and marine v e s s e l s u t i l i z e d by TPI . No adverse impacts on
pleasure boating, sport f i s h i n g , or recreation are a n t i c i -i
pated as a result of these proponed activities.
4. Cultural Resources
There are no known cultural resources located in Block A-10.
Visual No. 4 frora the Final Environmental Impact Statement
(FEIS) (U.S.D.I., 1986) indicates Mustang Island Block A-10
i s located outside the U.S.D.I. designated historic and
prehistoric cultural resources high probability lines. The
geohazards survey conducted on Block A-10 indicates four
undentified magnetic anomalies were detected. Attempts to
identify the point source proved inconclusive. The contacts
are presumed to represent a minor amount of ferrous debris
buried below the mudline or too small to be acoustically
detected. Therefore, no impact on cultural resources i s
expected.
5. Ecologically Sensitive Features
There are no known ecologically sensitive features located on
Mustang Island Block A-10 (U.S.D.I., FEIS, Gulf of Mexico,
1986, Visual No. 3). The nearest sensitive feature i s the
Southern Bank located approximately one and one half (1.5)
miles to the southeast of Block A-10. The proposed
operations should have no impact on this feature.
- 6 -
\
The onshore support bases w i l l necessitate the passage of
marine vessels, and helicopter t r a f f i c . These operations w i l l i f
have only minimal impact on the Louisiana shoreline.
I 6. Existing Pipelines and Cables
There is no evidence of any cables or pipelines being located
on Mustang Island Block A-10.
7. Other Mineral Uses
The a c t i v i t i e s proposed for Mustang Island Block A-10 w i l l
have no impact on other mineral uses.
8. Ocean Dumping
The major sources of ocean dumping related to OCS hydrocarbon
exploration a c t i v i t i e s are d r i l l i n g muds and d r i l l cuttings.
D r i l l cuttings are brought to the surface by the d r i l l i n g
mud. These cuttings are separated and disposed of overboard.
After the exploratory d r i l l i n g i n Mustang Island Block A-10
i s completed, TPI anticipates dumping i t s excess water-based
d r i l l i n g f l u i d (estimate 1000 bbls.). I f any oil-based mud
i s used, i t w i l l be transported to shore f o r proper disposal.
Treated domestic waste, d r i l l water, kitchen, and other
wastes w i l l also be disposed of at the proposed d r i l l s i t es.
There w i l l be no intentional discharge of any o i l y or hazard
ous materials i n v i o l a t i o n of MMS or EPA regulations.
- 7 -
Endangered or Threatened Species
Federally l i s t e d endangered or threatened species which might i
occur i r i the Mustang Isiand Area are the f i n whale, humpback
whale, j-ight whale, sei whale, sperm whale, Kemp's ri d l e y
t u r t l e , green t u r t l e , hawksbill t u r t l e , leatherback t u r t l e ,
and loggerhead t u r t l e (U.S.D.I., FEIS, Gulf of Mexico, 1986,
p 111-32). Of the whale species, the sperm whale i s perhaps
the most common i n the Gulf of Mexico. Generally, these
whales inhabit the waters of the continental slope and the
deep oceanic waters. The other species of whales may be con
sidered uncommon i n the Gulf. The leatherback t u r t l e i s
believed to prefer the deeper oceanic waters while th*% other
species may be considered more coastal i n nature. However,
i t i s possible t h a t any of these t u r t l e species may occur i n
the project area at one time or another. L i t t l e or no impact
i s expected to any of these threatened or endangered species
by the proposed a c t i v i t i e s .
The only fe d e r a l l y l i s t e d endangered or threatened species
expected to occur i n the v i c i n i t y of the Louisiana onshore*
base i s the bald eagle (U.S.D.I., FEIS, Gulf of Mexico, 1986,
Visual No. 2). AAso, the American a l l i g a t o r , which occurs
generally through the Gulf coast, i s l i s t e d i n Louisiana as
"threatened by s i m i l a r i t y of appearance". The bald eagle
inhabits the area from Morgan City, Louisiana east and north
t o the Mississippi River. No federally l i s t e d endangered
I
plant -species are known t o occur i n the Louis iana coas ta l
area.
I
The FE S f o r lease sales 110 and 112 (U.S.D.I., 1986) d i s
cusses the occurrence and impact on endangered or threatened
species. The impacts discussed are p r i m a r i l y based on the
occurrence o f o i l s p i l l s . The impacts on various endangered
and threatened species w i l l depend on the nature of the
s p i l l , weather conditions, p r o x i m i t y o f the s p i l l t o the
species, tolerance of the species f o r o i l , and the response
time and eff e c t i v e n e s s of the s p i l l cleanup and containment
servi- *hese v a r i a b l e s , the impact on the various
enda.^c^^ cnreatened species w i l l vary from no e f f e c t t o
serious.
The experience of o i l and gas ex p l o r a t i o n i n the Gulf of
Mexico i n d i c a t e s t h a t there i s a small p r o b a b i l i t y of occur
rence of an o i l s p i l l . The p r o b a b i l i t y remains low because
o f the l e v e l o f technology used by the i n d u s t r y t o insure
safe and responsible operations. TPI, as a prudent operator,
w i l l take the necessary measures tc reduce the p r o b a b i l i t y of
o i l s p i l l s . Towards t h i s , TPI w i x l comply w i t h OCS Order No.
7 on p o l l u t i o n n and c o n t r o l , and has an approved
O i l S p i l l Cont on f i l e w i t h the MMS. I t i s un
l i k e l y that the v .JU.: :r onshore a c t i v i t i e s r e l a t e d t o the
Mustang Island Area e x p l o r a t i o n d r i l l i n g a c t i v i t i e s w i l l have
- 9 -
any e f f e c t oc the federa l ' . j l i s t e d e. ac.agei sd or threatened
specji.es. r
I B. Socio-Economic Data
I n accordance w i t h MMS guidelines, the i n i t i a l OCS Socio-Economic
Data Base Report f o r the suppcrt base f a c i l i t i e s u t i l i z e d T r i
w i l l be prepared f o r submission pursuant t o the s p e c i f i c parame
t e r s t o be established by the MMS a t a l a t e r date.
UNAVOIDABLE ADVERSE IMPACTS
The greatest t h r e a t t o the environment would be caused by an o i l
s p i l l or v e i l blowout. These occurrences can oe reduced i n
number by u t i l i z i n g t r a i n e d personnel, adequate operational safe
guards, and employing avai l a b l e safety and p o l l u t i o n c o n t r o l
systems. These measures are standard operating procedure f o r
TPI.
The unavoidable adverse impacts t h a t w i l l occur as a r e s u l t of
the proposed e x p l o r a t i o n d r i l l i n g w i l l be few i n number and tem
p o r a r y i n nature. The primary adverse impacts are a l o c a l i z e d
degradation of water and a i r q u a l i t y i n the v i c i n i t y of the
d r i l l i n g s i t e , the p o t e n t i a l o b s t r u c t i o n t o commercial and re
c r e a t i o n a l f i s h i n g vessels, and the d i s r u p t i o n and/or k i l l i n g of
b e n t h i c and/or p e l a g i c organisms during the l o c a t i o n o i the
- 10 -
d r i l l i n g r i g and during the disposal of muds, cuttings, domestic
wastes, and treated sewage. i
r
The discharge) of d r i l l cuttings and water-based muds w i l l result
i n an increase i n water t u r b i d i t y , b u r i a l of benthic organisms,
and possible toxic e f f e c t on marine organisms i n the immediate
v i c i n i t y of the d r i l l i n g r i g . A reduction i n photosynthetic
a c t i v i t y and plankton population can also be expe-*- as a result
of discharging. However, i t i s expected that the pelagic and
b'*;ithic organisms w i l l repopulate the area rapidly after dis
charges end.
The proposed a c t i v i t i e s w i l l generate a small amount of a i r pol
lutants due to the emissions from the diesel engines; therefore,
some deterioration i n air quality of the CKJS oper.?" ion area i s
expected. These emissions affect only the :*n.T«diate a c t i v i t y
-•:te and are rapidly dissipated by the atmosphere. A Projected
A i r Emissions Report has been prepared for the propcsed a c t i v i
t i e s and i s included i n the Appendix to the POE to which t h i s
Environmental Report i s a part.
Commercial and recreational fish i n g could be affected by the pro
posed a c t i v i t i e s , mainly i n terms of interference. Although the
unavoidable adverse impacts could include some smothering of
s h e l l f i s h , reduction of the area presently available for unre
s t r i c t e d Wishing, and minimal f i n f i s h k i l l i n g , f i s h i n g a c t i v i t i e s
would not be s i g n i f i c a n t l y affected.
11
R E F E R E N C F S
1. United States Department of the I n t e r i o r , Minerals Management
Service, F i n a l Environmental Impact Statement, Gulf of
Mexico, December 1983.
2. United States Department of the I n t e r i o r , Minerals Management
Service, F i n a l Environmental Impact Statement, Gulf of
Mexico, December 1984.
3. United States Depar tme i t of the I n t e r i o r , Minerals Management
Service, F i n a l Envi ro omental Impact Statement, Gulf of
Mexico, November 1985.
4. United States Department of the I n t e r i o r , Minerals Management
Service, Final Environmental Impact Statement, Gulf of
Mexico, November 1986.
VFC pdm ORC/E3E 081287
12
COASTAL ZONE MANAGEMENT CONSISTENCY CERTIFICATION
Exploration Type of Pian
Mustang Island Block A-10 Area and Block
OCS-o 7175 Lease Number
The proposed a c t i v i t i e s described i n d e t a i l i n t h i s Plan comply wit h Louisiana's approved Coastal Zone Management Program and w i l l be conducted i n a manner consistent with such Program.
Arrangements have been made witii the State-Times in Eaton Rouge, Louisiana to publish a public notice of the proposed activities no later than A <*•—•> J> *s
Texaco Producing Inc Lessee or Operator
f - I f - T l Date
APPENDIX
Rig Specifications for "Penrod Rig No. 88"
Vicinity Map
Location Plat
Subsurface Structure Map
Geologic Cross Sections
Drilling Mud Components
Mud Additives
Projected Air Emissions Report
f RIG SPECIFICATIONS POR
i PENROD RIG NO.-88
EQUIPMENT INVENTORY
DRXLT:?:G JNIT - PENROD 88
Thm Ksjra-ho^ ?eTourneau Cantilevered Substructure Jack-Cp i s a trianTviar shaped hull witii three legs and cylindrical poir.ted spud cans. The hull i s raised and lowered by elesTrically driven rack and pinion gears. The platfora ifj .a^ed by the American Bureau of Shipping as a Self-KUr.-.ti«g Dri l l ing Unit.
gHBtfcSI VESSEL DIMENSIONS;
f Huil Length — —•• • — 20? f t . Hull 3r»sadth —— • • — • • • 176 f t . Depth o;f Bull • • — • — • ••• 20 f t . Gear Rac* Height •••••••• ——»— »«—~—— •- 24 f t . Overall Liingth of Spud Lags •—• 360 f t . Aft Spud Centers •• • • 122 f t . Centerline of Aft Spuds to Centerline of Bow Spud ——- 120 f t . Design Water Depth (Non-Hurricane with 25' penetration) 250 f t . Rated DrilX&ar Depth • • • — • 000 f t . See Attached Orid for Cantilever Capacities
feXOOXP 6 DRV SrORAGS C&PACITISS;
Drir . Watfir • ••• • ••• • < • • 3,120 bbla. Fresh Watar ————,~ 982 bbls. Fuel Oil • • • • - 1,953 b b l s . Bulk Mad/Cement •• ••• — (4)—1,925 cu. f t . tanks Liquid Mud — • • •••• " - 1,200 bbis. CRAN2S4
Three Marathon LeTourneau Series PCM-120 AS, 45 Tons at 25 feet, boos length IJO feet.
QUARTERS t •
Kir conditioned accommodations for 72 men; two galleys mess halls; f ive bed hospital.
Page .1
c
f
DRILLING OHZT - PENROD 88
HELIPORT: '
Sikorsky S-61 capacity or equal
DRAWWORKS:
National I320-OE Drawworks with 20,500 feet capacity of 9/16 inch sandline, emergency rotary drive and a Baylor Model 6032 Eddy Current Brake, Drawworks driven by two D-79 electric motors rated at 2000 hoisting *HP.
POWER;
Three EMD MD 12SS diese l engines. Each engine i s rated at 16S0 continuous HP and drives a 1050 KW 600 v o l t AC generator.
F ive Baylor b a s i c •Thyrig I I " units are uaed to Supply DC power for d r i l l i n g equipment.
MUD PUMPS;
Two National Model -12P-160 Triplex Mud Pumps.. Each independently dr iven by two EMD D-79 e l e c t r i c motors rated at 1600 HP and supercharged by e l e c t r i c driven 5* r"6" centr i fugal pumps.
DgRRXC*, SUBSTRUCTURE AND ACCESSORIES;
Derricks Service 147' high x 30' wide derrick with a s t a t i c hook load capacity of 1,044,000 lbs . with 12"
- l i n e s strung. One hundred (100) MPH wind load capaci t y with 180 stands of Ah' O.D. d r i l l pipe. National "type 760-F, 538 ton capacity Crown Block with seven •60" diameter sheaves grooved for 1-3/3" wire l i n e .
Adjustable casing stabbing platform.
Two 2G ton hoists ins ta l l ed below the substructure f e r handling the B.O.P. equipment.
TRAVELING BLOCK;
National Tupe 660-H-500, 500 tone traveling biock with e - « 0 " diameter sheaves grooved for 1-3/8" wire l i n e .
HOOK:
National Type H-500, SOO ton capacity.
Page 2
•
i
f
DRILLIN j; UNIT - PENROD 38
National Typa P-650, 650 ton capaci ty .
ROTARY EQUIPMENT;
National Type C-375 rotary with 37%" table opening independently dr iven by an EMD 0-79 e l e c t r i c motor through a National two speed transmission. Baash-Ross drive bushing. Baash-Ross Kelly bushing with wiper assembly.
MUD MIXING;
Two 6" x 5 c e n t r i f u g a l mud mixing pumps. Each pump driven by a 100 BP AC e l ec tr i c motor.
MOD STSTEM:
Three 400 bbl . capaci ty l iquid mud tanks and one : 00 b b l . capacity s lug tank. A i l ac t ive mud tanks equipped v i t h Brandt Model MA-20 mud ag i ta tors . One P10C03 Swaco Desander Unit with three 10" cones. One PQ4C16 Swaco Desilter Unit with sixteen 5* cones. One . Brandt high speed Dual Shaker.
PRILL 'PIPS AND DRILL COLLARS:
9,765 f t . o £ ' 4 V O.D. 16.60#/ft. Grade E , Range 2 O r i l l Pipe with 6%" O.D. x 4%" XS T . J .
4*,960 f t . of 4k" O.D. 2;o.00#/£fc. Grade C, Range 2 D r i i l Pipe with « V 3.0 . x 4h* XH T . J .
24 - 7" O.U. d r i l l c e l l a r s 30' long.
12 - 8"-0.D. d r i l l c o l l a r s 30 • long.
1 - Kelly 5*" HEX by 2-3/16" bore by 40' long with 4%* I . P . RB pin .
1 (pair) Baash-Ross ST-60 rotary tongs 3%- to 11-3/4" range.
2 - Byron-Jackson Type GG d r i i l ^ipe elevators for 4Jj" 0.0. d r i l l p ipe.
1 - Baash-Ross 6-3/4" - 8%" d r i l l c o l l a r s l i p .
Page 3
ORXLLINfS ONIT - PENROD 88
BLOWOUT/ PREVENTERS;
One Hydril 21%" - 2000 psi W.P. type MSP; One Hydril 13-5/8" - 10000 psi W.P. typa GL; Two Cameron 13-5/8" 10000 psi W.P. type "a" doubles;. One 10QOO-psi W.P-choke manifold with two hand adjustable chokes; and One Swaco automatic choke with remote controls. (Note rental on Swaco automatic choke to be paid by Texaco.) Blowout preventers and choke manifold treated for B3S service. Blowout preventers and choke manifold to be installed to Texaco's specifications in accordance with the attached drawing or other mutually approved plans.
Blowout preventer control unit i s a Koomey Mode'. ET25160-3BTM, .2,000 psi W.P. accumulator system.
COMMUNICATIONS EQUIPMENT t
S5: Channel 25 watt VHF/FM Marine Transceiver 1 350 watt FM Transceiver 6 -2 Channel VHF portable radios 1-100 watt FM Transceiver 1 - Inner Communication Systea with stations strategically located.
SPECIAL EQUIPMENT; *
1. Baash-Ross Pover S l ips with BH" s l i p bodies and 4Jj" s l i p i n s e r t s .
c •
2. ' Automatic D r i l l e r .
3. Mud-Gas Separator.
4. Dr i l l ing Recorder. * . 5. Dual mud l i n e s complete with dual sandpipes and
3" x 60" - 10000 p s i test rotary
6. Halliburton HT-400 cement unit with rec irculat ing * mixer driven by two EMD .0-75 e l e c t r i c motor.
. 7 . Varco Model 6500 Power Sub.
8. Totco P i t Leve l and Flowline indicator .
9. Two Maxim TCP - 7.5 water d i s t i l l a t i o n units -15,000 gallons per'day t o t a l .
Page 4
c
ORILLING oilIT - PENROD 88
10. Two 400 amps, welding machines and oxygen-acetylene equipment.
11. Halliburton heavy duty electric powered wireline unit with 14^00.' of .092" line.
12. OMSCO 6-5/8" 15,000 psi test upper Kelly vaive.
13. TIW 10,000 psi test lower Kelly vale.
14. Gray inside B.O..P.
15. Drilco E-3 torque hydraulic cathead.
16. Fork l i f t truck for sack mud storage room.
17. Totco straight hole instrument 0 degrees - 8".
18. Overrhota and Taper Taps for contractor furnished * • d r i l l string.
19. One 15,000 psi test d r i l l pipe, safety valve.
20. Totco type "£• WLA-75 weight indicator, OCT 20-25 tong torque gauge, MGS0 Pump pressure gauge, •379-35 Rotary RPM indicator, and 379-31 pump stroke indicators.
21. Baroid 821 Mud test kit.
22 i Air tuggers in various si2es for use on rig floor aad cellar deck area.
.23. One central a i r systea with two 490 CFM air ccmpressors, one cold start compressor and one water cooled after cooler.
24. Diesel engine driven 250 KW emergency AC generator.
25. Baylor Filteron sewerage treatment plant.
26. Drilco degasser.
27. Spinner Hawk Spinning Wrench.
28. 2 - 44 man Watercraft - Shats covered l i f e boats.
f o
Page 5
HOUSTON PORT ° ARTHUR
TEXAS GALVESTON
CORFJS CHRISTI
MATAGORDA
<§V- I S L A N D <£>^ A R E A
APPROX. 42 UIUZS A-10 GULF OF MEXICO
TEXACO PRODUCING INC. N B W O R L E A N S , L A . ©
D R A W I N Q N O X T O S C A L I
kVSrm ISLAND BLK. A-10 OCS-G-7/75
APPROX. 57 MIIES SOUTHEAST OF CORPUS CHRISTI. TEXAS
ceai/siutAceanpOE CREKJ 6-23-87
Y - 666J89.75
3I0CT
Co
WELL 'C SURF. & PBHL 0CS-G-7I75 MUSTANG ISLAND BLOCK A-10
cv
5
i 65017
MUSTANG ISLAND BLK. A-10 OCS-G-7176
TEXACO PRODUCING INC. LS (5760 ACRES)
W5EU 'D* SWF. & PBHL 0CS-G-7I75 MUSTANG ISLAND BLOCK MO
WELL 'A' SURF. & PBHL 0CS-G-7I75 MUSTANG ISLAND BLOCK A-10
WEU 'L7 SURF. & PBHl 0CS-G-7I75 MUSTANG ISLAND BLOCK A-10
500CT
Y - 650349.75
NOTE* AIL COORDINATES ARE BASED ON TEXAS LAMBERT PLANE COORDINATE SYSTEIi. (SOUTH ZONE NAD 27).
P L A N O R E X P L O R A T I O N PUBUC IHFQPMAJIOH PLAI
TEXACO PRODUCINQ INC. N E W O R L E A N S , L . A .
MUST AMS /SLAV'S BLK. A-H) OCS-^7(7S
APPROX. 57 UILES SOUTHEAST OF CORPUS CHRIST/. TEXAS
SCALE
>000* 0* IOOD-
l2aU&]j/lAJ0A2DP0E iREHJ
20DD-
B-Z7-B7
DRILLING MUD COMPONENTS
Common Chemical 01 Chemical Trfrde Na^
j
Aluminum Stearate
" AKTAFLO-S" j
B a r i t e
Calcium Carbonate
Calcium Chlor ide
Calcium Oxide
Calcium Su l fa te
Carboxymethyl C e l l u l o s e
Caus t ic Potash
Caus t ic Soda
Chrome L i g n i t e
Chrome Lignosu l fona te
D r i l l i n g Detergent
"E-Pal"
Ferrochrome L ignosu l fona te
Gel
Gypsum
L i g n i t e
L i g n o s u l fonate
"Mud Sweep"
"MOR-REX"
"Sha le -Tro l "
Sapp
Soda Ash
Sodium Bicarbonate
Sodium Carboxymethyl Cel lu lose
Sodium Chloride
Sodium Chromate
Starch
"TX-9010"
"TORQ-Trim"
Description of Material
Aluminum Stearate
Nonionic Surfactant
Barium Sulfate (BaSO.) 4
Aragonite (CaCO )
Hydrophilite (CaCL2)
Lime (Quick)
Anhydrite (CaSO )
Carboxymethyl Cellulose
Potassium Hydrate
Sodium Hydroxi le (NaOH)
Chrome L i g n i t
Chrome Lignosulfonate
Soap
Non-toxic, biodegradable defoamer
Derived from woo*' pulp
Sodium montmorillonite, bentonite,
attapulgite
CaS04.2H20
Lignite
Lignosulfonate
Cement Pre-flush
Hydrolyzed Cereal Solid
Organo-aluminum complex
Sodium Acid Pyrophosphate
Sodium Carbonate
NaHCO3
Sodium Carboxymethyl Cellulose
NaCL
NaCrn4.10H2O
Corn Starch
Biodegradable d r i l l i n g lubricant
Biodegradable d r i l l i n g lubricant
DFC:taw POE/2
•I j r
J Common Chemical or Chemical Trade Name
"Black Magic"
"Black Magic Supermix"
Diesel
" J e l f l a k e "
MICA
"P ipe -Lax"
" W a l l - N u t "
Wood F i b e r s
MUD ADDITIVES
Description of Ma t e r i a l
O i l base mud concentrate
Sacked concentrated o i l base mud
Used t c mix c e r t a i n l o s s -c i r c u l a t i o n p i l l s
P l a s t i c f o i l , shredded cellophane
L o s s - c i r c u l a t i o n m a t e r i a l
Surfactant mixed w i t h d i e s e l
Ground w a l l n u t s h e l l s
L o s s - c i r c u l a t i o n m a t e r i a l
DFC tdw POE/2 8/13/87
PROJECTED AIR EMISSIONS REPORT
MUSTANG ISLAND BLOCK A-10
FEDERAL LEASE OCS-G 7175
LOCATIONS "A", "B", "C" AND "D"
EMISSIONS IN POUNDS PER DAY
TEMPORARY SOURCES 2
D r i l l i n g Equipment.
N O x 257
CO
56
VOC
21
TSl
18
SO 2
17
Other Sources 19 15 11 _2 _2
TOTAL 276 71 32 20 19
EMISSIONS IN TONS PER YEAR
TEMPORARY SOURCES1
2 D r i l l i n g Equipment
N0 x
47.0
CO
10.2
VOC
3.8
TSP
3.8
SO?
3.1
Other Sources 3 3.5 2.7 2.0 2.0 0.4
TOTAL 50.5 12.9 5.8 5.8 3.5
Emission Exemptions f o r NO , CO, VOC, TSP and S0 2 are calculated
using the following formulas with a distance from shore of 37
miles.
E =
CO Exemption (E) i n Tons Per Year.
3400 x (distance f rom shore) 2 / 3 *= 3400 (37) 2 / 3 « 37,753
NO , VOC, TSP, SO„ Exemption (E) i n Tons Per Year.
33.3 x distance f rom shore = 33.3 (37) • ^ 3 2
(1) A i r emissions f rom temporary a c t i v i t i e s t h a t occur i n one l o c a t i o n f o r l e ss than three years are exempt f rom f u r t h e r a i r q u a l i t y r ev iew. Temporary a c t i v i t i e s f o r t h i s proposal w i l l l a s t approximately 432 days, t h e r e f o r e , being w i t h i n the l i m i t s o f the d e f i n i t i o n o f temporary a c t i v i t i e s .
(2) Based on 60 h p h r / f t . from study, "Atmospheric Emissions From Offshore O i l and Gas Development and Produc t ion , " EPA 450/3-77-026, June, 1977.
(3) Based on emission f a c t o r s f rom "Compilat ion o f A i r P o l l u t a n t Emission Fac to r s , " T h i r d E d i t i o n EPA Report AP-42, August,
1977 (Tables >3.2.1-3, 3.2.3-4, and 9.1-2). Included are helicopter landing and take o f f , two trips/week; supply and/or crew boats, at dockside, 12 hrs./day, two days/week? fuel storage land transfer; loading and unloading operations; and incineration of waste paper (average of 800 lb/mo) for duration of project.
DFC tdw POE/2 8/13/87