Mr. Daniel J. Bourgeois Regional Supervisor ^ RFnnvED % o 1993 · 2020. 1. 16. · Stb.. - 10th. Principal Zilkha Energy Company 1201 Louisiana, Suite 3200 Houston^ Texas 77.0.02-5223.

Z I L K H A E N E R G Y C O M P A N Y

February 26, 1993

^ RFnnvED %o>

MAR 0 5 1993 * S / O e , OPERATIONS % * .

Reg ion , N ^ 0 -

Mr. Daniel J. Bourgeois Regional Supervisor Office of Field Operations U. S. Department of the Interior Minerals Management Service 1201 Elmwood Park Boulevard New Orleans, Louisiana 70123-2394

Attention: Mr. Mike Connor Pipeline Unit

RE: Notification of Pipeline Abandonment Operations Segment No. 9169, 2-Inch Supply Gas Right-of-Way Pipeline Installed In and/or Through Blocks 107 and 106, South Timbalier Area, OCS Federal Waters, Gulf of Mexico, Offshore, LA

Gentlemen:

By letter dated October 9, 1992, Minerals Management Servie approved Zilkha Energy Company's (Zilkha's) application for abandonment of the 2-Inch supply gas right-of-way pipeline originating at Platform "A" in South Timbalier Block 107 and terminating at Caisson No. 1 in South Timbalier Block 106, Offshore, Louisiana.

Please be advised that Zilkha Energy Company successfully completed the abandonment operations effective January 8, 1993.

Should you have any questions regarding this matter, please contact Zilkha's regulatory agent, Connie J. Goers, J. Connor Consulting, Inc. at (713) 558-0607.

Sincerely,

ZILKHA ENERGY COMPANY

Steve Brunner Operations Manager

SB:CJG

1201 LOUISIANA STREET, SUITE 3 2 0 0 • HOUSTON. TEXAS 7 7 0 0 2 - 5 2 2 3 TELEPHONE- (713) 6 5 5 - 5 9 0 0 • TELECOPIER (7131 6 5 5 - 5 9 6 1

TELEX 7 9 8 - 6 7 9

Shi rnitf

In Reply Refer To: MS 5421 December 1, 1992 OCS-G 12340

ACTION

Zilkha Energy Company Right-of-way

RELINQUISHMENT OF RIGHT-OF-WAY GRANT ABANDONMENT OF PIPELINE

On August 2, 1990, Zilkha Energy Company f i l e d an application f o r a right-of-way two hundred feet (200') i n width f o r the i n s t a l l a t i o n , operation, and maintenance of a 2 3/8-inch gas supply pipeline, 1.01 miles i n length, from Century Offshore Management Corporation's Platform A i n Block 107 to Zilkha Energy Company's Caisson No. 1 i n Block 106, a l l i n the South Timbalier Area. By l e t t e r dated August 31, 1990, the application was approved and the right-of-way granted. Proof of construction was subsequently accepted on 0.96 miles of l i n e pipe on November 20, 1990.

On October 9, 1992, Zilkha Energy Company requested relinquishment of the above-described right-of-way i n i : t s _ e n t i r e i y . A d d i t i o n a l l y , grantee requested permission t o abandon i n place the subject pipeline i n accordance with 30 CFR 250, Subpart J.

Inasmuch as grantee has agreed t o comply with 30 CFR 250, Subpart J, removal of the 0.96 miles of l i n e pipe i s hereby waived. However, i n the future, should i t be determined that t h i s pipeline constitutes a hazard to navigation or commercial f i s h i n g operations or unduly inter f e r e s with other uses of the OCS, Zilkha Energy Company sha l l be required to remove i t .

Therefore, the pipeline right-of-way grant i s relinquished e f f e c t i v e as of October 9, 1992, the date the request f o r relinquishment was f i l e d i n t h i s o f f i c e .

Notify t h i s o f f i c e i n v/riting w i t h i n 30 days a f t e r completion of the pipeline abandonment.

(Orig. Sgd.) J. ROGERS PEARCY

J. Rogers Pearcy Regional Director

cc: Case F i l e

MHHOLMES/

Proof of Construction is accepted 11/20/90 Ftorm 4-1181 (Jul, W51) B I L L I N G I N D E X

Bond „ Fund iymbol (Acq. lands only) Serial No. O C S - G 1 2 3 4 0 B I L L I N G

D A T E No bond

Effective datt l*asf Unit, ittumd. attignmml. (Acrei. milet.

Expiration date

Total rvaal rate

Type . . . P / L . R / W .

Cuunly iittri-but ion oj

total rental rate County dittriha-

tion (County name)

D a u i u u e d J/J.L/i0..l-.035 $15.00 §30.00 Blocks 107, _ &..ipA/...SoutA .1990.. pd^ 6th.

11/20/90 O.MSi . Timbalier..

B I L L S I S S U E D

Y t u o f Yurof

2d 1 2 / 1 / 9 0 p d .

„ Itb.

3d. ^ < V ? f Pd- . 8th...

4th 9th. . .

S t b . . - 10th.

Principal Zilkha Energy Company 1201 Louisiana, Suite 3200 Houston^ Texas 77.0.02-5223.

Amelinaa of undivided intarmt

Operator

1234 0 Zilkha Energy Company

BEST AVAILABLE COPY

United States Department of the Interior MINERALS MANAGEMENT SERVICE

GULF OF MEXICO OCS REGION ™ 1

1201 ELMWOOD PARK BOULEVARD NEW ORLEANS, LOUISIANA 70123-2394

In Reply Refer To: MS 5421 December 1:; 1992 OCS-G 12340

ACTION

Zilkha Energy Company Right-of-way

RELINQUISHMENT OF RIGHT-OF-WAY GRANT ABANDONMENT OF PIPELINE

On August 2, 1990, Zilkha Energy Company fi l e d an application for a right-of-way two hundred feet (200') in width for the installation, operation, and maintenance of a 2 3/8-inch gas supply pipeline, 1.01 miles in length, from Century Offshore Management Corporation's Platform A in Block 107 to Zilkha Energy Company's Caisson No. 1 in Block 106, a l l in the South Timbalier Area.; By letter dated August 31, 1990, the application was approved and the right-of-way granted. Proof of construction was subsequently accepted on 0.96 miles of line pipe on November 20, 1990.

On October 9, 1992, Zilkha Energy Company requested relinquishment of the above-described right-of-way in i t s entirety. Additionally, grantee requested permission to abandon in place the subject pipeline in accordance with 30 CFR 250, Subpart J .

Inasmuch as grantee has agreed to comply with 30 CFR 250, Subpart J, removal of the 0.96 miles of line pipe i s hereby waived. However, in the future, should i t be determined that thi s pipeline constitutes a hazard to navigation or commercial fishing operations or unduly interferes with other uses of the OCS, Zilkha Energy Company shall be required to remove i t . !

Therefore, the pipeline right-of-way grant i s relinquished effective as of October 9, 1992, the date the request for relinquishment was fi l e d in this office.

Notify this office in writing within 30 days after completion of the pipeline abandonment.

J . Rogers Pearcy Regional Director

cc: Case F i l e

/ 0 / / o /<?

To: Adjudication Unit (MS 5421)

From: Pipeline Unit, Field Operations (MS 5232)

Subject: Right-of-Way 'Relinquishment/Abandonment

Company:

Right-of-Way Number: OCS -G - IZ340

OCT 2 2 1992

MINERALS MANAGEMENT SERVICE LEASING & ENVIRONMENT

The subject abandonment has been reviewed and has been found to be in compliance with 30 CFR 250.157(o).

Pipeline abandoned in place

Pipeline abandoned by removal

Pipeline never constructed

Enclosure


October 5, 1992


Attention: Mr. Alex Alvarado

RE: Application to Abandon Pipeline and Relinquish Right-of-Way Grant (OCS-G 12340/Segment No. 9169) 2" Supply Gas Right-of-Way Pipeline Installed In and/or Through Blocks 107 and 106, South Timbalier Area, Offshore, Louisiana

Gentlemen:

Pursuant to regulations contained in Title 30 CFR Part 250.156(a)(1), Zilkha Energy Company hereby requests approval to abandon in-place an existing 2" supply gas right-of-way pipeline (OCS-G 12340/Segment No. 9169) originating at Platform "A" in Block 107 and terminating at Caisson No. 1 in Block 106, a l l being located in the South Timbalier Area, Offshore, Louisiana.

As a result of reservoir depletion, Zilkha has elected to plug and abandon existing Well No. 1, and has submitted an application to remove Caisson No. 1.

Subject to approval of this application, pipeline abandonment operations are scheduled to commence during October, 1992 with an anticipated project duration of fourteen (14) days.

Zilkha will utilize an onshore support base located in Fourchon, Louisiana.

In support of this request, enclosed please find the following information:

1. Detailed abandonment procedure

2. As-Built Pipeline Route Map

ACCEP

Effective Date 0 C T 9 1992

1201 LOUISIANA STREET, SUITE 3 2 0 0 • HOUSTON, TEXAS 7 7 0 0 2 - 5 2 2 3 TELEPHONE. (713) 6 5 5 - 5 9 0 0 • TELECOPIER. (7131 6 5 5 - 5 9 6 1

TELEX. 7 9 8 - 6 7 9

Minerals Management Service Pipeline Abandonment Procedure

Page Two

Furthermore, Zilkha hereby advises of i t s intent to relinquish the right-of-way grant for the subject pipeline.

Should you have any questions or requests for additional information, please contact our regulatory agent, Connie J. Goers, J. Connor Consulting at (713) 558-0607 at your earliest convenience.

Sincerely,

ZILKHA?ENERGY COMPANY

0fl /John B. June&u Vice President, Exploration

JBJtCJG Enclosures

ZILKHA ENERGY COMPANY SOUTH TIMBALIER BLOCK 106

2" PIPELINE ABANDONMENT PROCEDURE

1. Bleed off and disconnect the pipeline at the top of the risers at South Timbalier Block 106, Caisson No. 1 and South Timbalier Block 107, Platform "A".

2. Connect the 2" pipeline, through a temporary pig receiver, to a flexible line which routes to a slop tank on a standby boat at South Timbalier Block 107, Platform "A".

3. Launch a poly pig into the 2" pipeline at South Timbalier Block 106, Caisson No. 1 and push it with salt water to South Timbalier Block 107, Platform "A". Pump salt water through the line till it is evident there are no hydrocarbons being flushed out.

4. Remove the flexible hose and temporary pig receiver.

5. Cold cut the 2" pipeline at the base of the riser, and 10' from the base of the riser at both ends of the pipeline and install pipeline plugs.

6. Remove the two 10' sections of pipe.

7. Sand bag the ends of the abandoned line to maintain 3' of cover.

8. Cut the riser at the (+) 15' and remove from the clamps.

NOTE: All related production equipment at South Timbalier Block 107, Platform "A" will be isolated and blown down prior to starting this abandonment procedure.

{st106pr.sn}cag

Y» 14.000'

OCS-G-9643

9 / L X«2 .30S .096 . I0 '

Y i 10,969.36'

BOTTOM OP RISER ZILKHA ENERGY BLK 1 0 6 - U X-2,304,355.86' Y - 10,664.08' IAT. 2 8 ° 4 1 ' 3 3 . 0 8 7 ' LONG. 9 0 ° 2 3 ' 0 3 . 2 9 8 '

co o

+

BOTTOM OF RISER CENTURY OFFSHORE BLK 107-A X-2,307,354.24' Y- 14,424.97• LAT. 28°42•10.068" LONG. 90"22*29.287"

o

o

3 00

COOROINATES ARE BASED ON THE LOUISIANA (Lambert:) PLANE COORDINATE SYSTEM, SOOTH ZONE fGrid Units in Feet) G£O DATUM: NAD 1927, CLARKE 1866 SPHEROID

CERTIFIED CORRECT AS TO HORIZONTAL POSITION OF AS-BUILT PIPELINES

REGISTERED LAND SURVEYOR STATE OF LOUISIANA JOHN E. CHANCE & ASSOCIATES,

BEST AVAILABLE COPY

TOTAL LENGTH • S.06O.I6' • 0.96 M.

) AS-BUILT 2* ft 3* PIPELINES (2") MMS SEQ. Na 9169 (3*) MMS SCO. ML 9168

OCS-G-5601

T I E Y X &OJ*.

106*1 10,664* 2 ,304 ,355 ' 1 10,667* 2 ,304 ,374 ' 2 10,667* 2,304,394* 3 10,664* 2,304,458* 4 10,823* 2,304,806* 5 11,048* 2 ,305,253* 6 11,349* 2,305,604* 7 11,988* 2 , 3 0 6 , 2 1 9 ' 3 12,451* 2 ,306 ,599 ' 9 12,866* 2 ,306 ,817 ' 10 13,271* 2,307,025* 11 13,723* 2 ,307 ,166 ' 12 14,146* 2,307,284* 13 14,252* 2 ,307 ,306 ' 14 14,367* 2 ,307 ,350 '

107-A 14,424* 2 ,307 ,354 ' 9AJt

INC. For Subsea Int.


AS-BUILT 2" 8 3" PIPEUNES

SOUTH TIMBAUER AREA

GULF OF MEXICO

SCALE' \ ' - IOOO' 9/26/90

$*at^ tl' fb- HO -In Reply Refer To: VL 5232

V Zilkha Energy Company 2 0 1990 Attention: Mr. J. Bradley Juneau 1201 Louisiana Street, Suite 3200 Houston, Texas 77002-5223

Gentlemen:

In accordance with 30 CFR 250.158(b), your lette r dated November 6, 1990, transmitted a pipeline construction report for the following right-of-way pipeline:

Pipeline Right-of-way Size Length Humber (inches) (feet) Service Status From To

5,060 Supply Act Platform A Caisson No. 1 Gas South Timbalier South Timbalier

Block 107 Block 106

\ The data which you provided indicates the following test information and establishes the assigned maximum allowable operating pressure (MAOP) for this pipeline:

Pipeline Right-of-way Test Pressure Duration MAOP MAOP Number (psi^) (hours) (psip;) Determination

OCS-G 12340 1,883 8 1,480 Valves and Flanges

Because grantee has deviated from the approved right-of-way i n South Timbalier Block 107, Zilkha Energy Company shall notify Century Offshore Management Corporation, operator of Lease OCS-G 5601, to that effect. A return-receipt card or lette r from Century Offshore Management Corporation evidencing proof of notice must be submitted to this office within 60 days of receipt hereof.

The t o t a l length of the "as-built" pipeline right-of-way i s 0.96 mile.

In future correspondence, please refer to the above pipeline by i t s assigned right-of-way number.

Sincerely,

(Orlg. Sgd.) A. Donald Giroir

D. J. Bourgeois Regional Supervisor Field Operations

bcc: 11502-01 12340 w/orig report (MS 5232) 1502-01 12340 w/cy of report (C. Williams) (MS 5033) MS 5421 r^Ji. MS 5232 Carto (w/cy of location plat) V ^0

ABritton:ds:11/15/90 :WP (JK ^


November 6, 1990


Attention: Ms. Carol Williams

RE: OCS-G 12340 Supply Gas Right-of-Way Pipeline Installed In and/or Through Blocks 107 and 106, South Timbalier Area, Gulf of Mexico, Federal Waters, Offshore, Louisiana

Gentlemen:

By letter dated August 31, 1990 your office approved Zilkha Energy Company's (Zilkha) application for installation of a 2-3/8" supply gas right-of-way pipeline originating at Century Offshore Management Corporation's Platform "A" in Block 107 and terminating at Zilkha's Caisson No. 1 in Block 106, all being located in the South Timbalier Area, Offshore, Louisiana.

In accordance with regulations contained in Title 30 CFR 250.158(a), your office was notified prior to commencement of installation and hydrostatic testing of the subject pipeline.

In accordance with regulations contained in Title 30 CFR 250.158(b), enclosed in triplicate is the "as-built" pipeline route map and hydrostatic test pressure data.

Should you have any questions regarding this data, please contact our regulatory agent, Connie J. Goers, J. Connor Consulting at (713) 558-0607.

Sincerely,


(. Bradley Juneau Vice President

JBJ:CJG Enclosures

1201 LOUISIANA STREET. SUITE 3 2 0 0 • HOUSTON. TEXAS 7 7 0 0 2 - 5 2 2 3 TELEPHONE 17131 6 5 5 - 5 9 0 0 • TELECOPIER; 1713) 6 5 5 - 5 9 6 1

TELEX: 7 9 8 - 6 7 9

s IO

eS

V« 14,000'

OCS-G-9643

B/L X° 2.305,096.10'

Y= 10,969.36'

BOTTOM OP RISER ZILKHA ENERGY BLK 106-#1 X-2,304,355.86' Y= 10,664.08' LAT. 28 o41•33.087 ,' LONG, g o ^ ' o s ^ s "

BOTTOM OP RISER CENTURY OFFSHORE BLK 107-A X-2,307,354.24' Y- 14,424.97' LAT. 28o42'10.068" LONG. 90o22'29.287"

(0 1-g O

o o 3 3 CQ m

BEST AVAIUBLE COPY

TOTAL LENGTH = 5,060.16' = 0 .96 Ml.

AS-BUILT 2" 8 3" PIPELINES (2") MMS SEG. NO. 9169 (3*) MMS SEG. NO. 9168

OCS-G-560/

TIE Y X B.O.R.

106#1 10,664' 2,304,355' 1 10,667' 2,304,374' 2 10,667' 2,304,394' 3 10,664' 2,304,458' 4 10,823' 2,304,806* 5 11,048' 2,305,253' 6 11,349' 2,305,604' 7 11,988» 2,306,219' 8 12,451' 2,306,599* 9 12,866' 2,306,817' 10 13,271' 2,307,025' 11 13,725' 2,307,166' 12 14,146' 2,307,284' 13 14,252' 2,307,306' 14 14,367' 2,307,350'

107-A 14,424* 2,307,354' B.O.R.

COORDINATES ARE BASED ON THE LOUISIANA (Lambert) PLANE COORDINATE SYSTEM, ; SOUTH ZONE (Grid Units in Feet) GEODETj DATUM: NAD 1927, CLARKE 1866 SPHEROID

CERTIFIED CORRECT AS TO HORIZONTAL POSITION OF AS-BUILT PIPELINES

REGISTERED LAND SURVEYOR NO. 4335 STATE OF LOUISIANA JOHN E. CHANCE & ASSOCIATES, INC.

* - • - * :8NUBLE J. TENNEV, JR.

RCQ. Na 4936 RCaiSTCI ICO

i l l

Prepored For Subsea Int.


AS-BUILT 2" a 3" PIPELINES

SOUTH TIMBALIER AREA

GULF OF MEXICO

SCALE: l"= IOOO' 9 / 2 6 / 9 0

^ =ST AVAILABLE COPY Report No. Project No.f/£/$0

Company ZZ/L&fo Date ^ V / ~ ? #

Pipeline Description Sti fitly ^tivf •

Testing Contractor l5tt£ J^M/

Construction Contractor 5*4 SZA 7Z4

Section Tested From: MP/Sta. ^ST/Cl A- To: MP/Sta. ST/*6 */

Pump Location: MP/Sta. ST/t-? A Press. Recorder Loc: MP/Sta. $t/<r?4

Length of Section /frzflc &3Lfa.ik- Volume of Section ^ ^ t C 5" ^ pl.

Test Pressure /&St>/*tlu / fco ><4/y

Pipe Tested (size, wt., grade, type and manufacturer)

Type and Source of Test Medium^^ O-kfet

Additive AJo/Jt^ Quantity of Additive AJ/A (Quantity per Unit Vol.)

Elevation Difference of Section feet 9-'% psi

Ime and Date Test Started J-VST a.m. J-M'fD

Time and Date Test Ended //AfS* a.m. <7~/6~'?c>

Section Accepted Section Leaking Section Ruptured

ocation and Type of Failure

emarks

ompany Representative ; . Date

Contractor Representative /Q* £^jCua^ Date f^-M'^D

BEST AVAILABLE COPY

»-

HYDROTEST REPORT

SHEET 2

COMPANY 2JIÂ *

BEST AVAILABLE COPY

REPORT NO. JL

PROJECT NO ?0?tW

TIME PRESS. PSIG

WATER TEMP T

AIR TEMP "F TIME

PRESS. PSIG

WATER TEMP T

AIR TEMP T

1 /TSS" / f t 7 ft0 21

2 22 3 ft* 23 4 f j * 24 5 ?/* 25 6 fc0 26

7 go' 27 8 ?$* 7?° 28 9 /m 79° 29 10 7?° 30 11 31 12 ®0 fo 32 13 mi %7e 33 14 /MB 34 15 /m -^0° 35 16 /fS3 36 17 IP 37 18 38 19 39 20 40

THIS IS TO CERTIFY THAT THE ABOVE IS A TRUE AND ACCURATE RECORDING OF THIS HYDROSTATIC TEST AS INDICATED BY THE FOLLOWING CERTIFIED DEAD WEIGHT TESTER.

MAttF /U£.MU*f ^ a l y SERIAL NO. ^ 3 -LAST CALIBRATION DATE: A- ty - fy . :

INSPECTOR'S SIGNATURE „ . >, : DATE. CONTRACTOR'S SIGNATURE /CW/ 7<<**\£«^ •DATE W O

HYDRO

^yg^V^ Oil Sf Gas Specialties Company Ove' 35 Years , i iJ21 Todd St • Boi-Sj3Cd • Houston. Texas 772f.S • (713) 686-344« • Telex 29-3366

, CALIBRATION CERTIFICATE tfcnufacturer REFINERY SUPPLY Type of Instrument DEAD WEIGHT

Model Number Serial Number 202 Range 0-10, 000#

âte of Calibration 6/14/90 Inspector DAVID ROGERS

CALIBRATION BEST AVAILABLE COPY

INCREASING PRESSURE/TEMPERATURE DECREASING PRESSURE /TEMPERATURE

APPLIED INDICATED APPLIED INDICATED

0 0 10,000# 1 0 , 0 0 3 *

2500# 2501# 7500# 7499#

5000# 5002# 5000# 5002#

7«;nn* 7 4 Q q « •?<;nn# ?^01#

10,000# io,oon 0 0

^his is to ce r t i fy that the above described device has been inspected and tested arrainst the following standard:

Pressure VTX 802-0084 SN:2790 NBS Reference P-7819

Temuerature 19240-2 SN:152904048 NBS Reference U.S. TESTING 83-0492

Testing was conducted with the device i n the ( ) Vertical position ( ) Horizontal position

OGASCO BRANCH OFFICES Bo» 5142-1 O C S Ldlrtyeite Louisiana 7050b

(318, 23S 4444 (318) 235 5823

Box 9:-Harvty Louisia.id HM'jLt

COii 167 7914

PO Bo< 6157 Tuisa Oklahoma 74 148

(9181 832 8975

OGASCO Oil Gf Gas Specialties Company

11321 Todd St • Box 55306 • Houston. Texas 77255 • (713)686-3444 • Telex 29-3368

CALIBRATION CERTIFICATE Type of Instrument RECORDER Manufacturer BARTON

Model Number Serial Number 08547 Range 0-150 oF

Date of Calibration

4.

5/30/90 Inspector

CALIBRATION BEST AVAILABLE COPY

INCREASING PRESSURE/TEMPERATURE DECREASING PRESSURE/TEMPERATURE


3 4 0 F 3 4 0 F 150 O F 150 O F

B0 O F 50 O F 1 2 5 0 F 125 0 F •

. 7 5 0 F 7 5 0 F 100 O F 101 O F •»

100 O F 101 O F 7 S 0 F 7 5 0 F

1 2 5 0 F 125 0 F 5 0 O F 50 O F

150 O F 150 O F 3 4 0 F 3 4 0 F

This is to ce r t i fy that the above described device has been inspected and tested apainst the following standard:

Pressure v r x 802-0084 SN;2790 N B S Reference P-7819

Temperature 19240-2 SN; 152904048NBS Reference U.S. TESTING 83-0492


OGASCO BRANCH OFFl ids Box 51424 O C S Lalayelle. Louisiana 70505

(318) 235-4444 (318) 235 5823

Bo« 93 Hafvey Louisiana 70059

(504) 367 7914

PO Bo» 6157 Tulsa Oklahoma 74148

(918) 832 8975

/

Ovei 35 Years

Oil & Gas Specialties Company 11321 Todd SI • Box 55306 • Houslon. Texas 77255 • (713)686 3444 • Telex 29-3368

CALIBRATION CERTIFICATE Type of InstrumentRECORDER 1 f/anufacturer BARTON

Model Number Serial Number 32688 Range 0-10,000*

Date of Calibration 5/30/90 Inspector (DaJS Qcng^— DAVIDROGKRS

BEST AVAILABLE COPY CALIBRATION

INCREASING PRESSURE/TEMPERATURE DECREASING PRESSURE/TEMPERATURE


0 0 1 0 , 0 0 0 * 1 0 , 0 0 0 *

25001 2500* 7500* 7500*

5000# 5000* 5000* 5000*

7500* 7500#

10,000* 10 ,000* 0 0

This is to cer t i fy that the above described device has been inspected and tested against the following standard:

Pressure y r x 802-0084 SN;2790 N B S Reference p-7919

Teniperaturei9240-2 SN; 1 5 NBS Reference 0 > s > TESTING 83-0492


OGASCO BRANCH oVflCES Box 51424 O C S Ldlayelle. Louisiana 70505

(318) 235-4444 (318) 235 5823

Bo> 93 Harvey Louisiana 70059

(504) 367 7914

PO Box 6157 Tulsa Oklahoma 74148

(918) 832 8975

• m .v.-/'.:: ,

.V. :•:

BEST AVAILABLE COPY

!6 AM

BEST AVAILABLE COPY

: . - • . , - • •

BEST AVAILABLE COPY P H T U H E INSPCCTIUH CHECK LIST

I : Coinuany Contact: ~ \ h i A f ^ W ^ / AA4:-|D Uate of Inspection

Lessee/Operator: Cfititrac lor : Uarge ID

MS Inspector: S<Ud&gT Hartjo or i'i a Iforji!:. Location

DOI/I/TM: Segiuciit Ho.: — ^"

From: <&S7~ /SM- j^ ' yr-z jiAVAf s rr

Size:

Grade:

Seamless:,

Coating:

' 1 PEL 1HK CUNS i HUCi i ON/SPEC IFICAIIONS

Wall llilckncss:.

Anodes:

Type:

Ho.:

Weight:

Spaclny:

Pipe!Ine Crossing & Clearance:.

Lxlstlny PipelInQ(s) Bouyed:

Length:

Burial Ucpth:

Valves/Taps Cover:

HIP UAIA

(l!edlu:ii) Water or iVoduct

Dura tion Tir.ie

Pressure (PSI)

Ral I m j :

MINIMUM RATING (JF VALVCS. FLANGES. Fl THUGS AfiU 1'KESSUHE DAIA

Approved MAUI': '

Seryice:.

Source:

IF Well (si. Sli;':

Pipeline Flowing Pressure:

liant/p dUl.Wjl'J

l l lyh Sensor(s):

Low Sensor(s):

PSV:

Is low sensor installed where it could not be isolated?.

(USER PROTECTION

Coating: Qumper Guard: Splash Guard:

Water Depth:

Remarks:

O P t i O * : OCU OCS «IOICN

SM

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BEST AVAILABLE COPY

Q p r i C * . GU) OCS ft£CtCM UNITCO S I A U S of PAR i t r Mt or ruF iwr ts ioa

UI I I ;RAI .S u«H*r.iurNr SEKVITE outf w U K K O IA.S PJUII^M

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MINIRAIS MANACLUENT SfRVK.E GUIF Of HEX MO OCS REGION

P1PEUUE INSPECTION FORM

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• • • INSPECTIOM SUM1ARY • • •

TVPE INSPECTION LASI fcu^^

DATt LAST INSP

INSPECIOnS COOE LASI (.UHRENI

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I OST OIL

LOST GAS

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••• REMARKS •••

LINE NO

dEST AVAILABLE COPY OCT 0 3 1990

In Reply Refer Tot MS 5232

Zilkha Energy Company Attention: Mr, John B. Juneau 1201 Louisiana, Suite 3200 Houston, Texas 77002-5223

Gentleaen:

Your l e t t e r dated August 17, 1990, requests approval te eliminate the flow safety valve (FSV) and the shutdown valve (SDV) on the following pipeline boarding the South Timbalier Blook 106, Well Ko. 1 caisson:

Pipeline Segment Ho.

Size Length (Inohes) (feet) Servioe

9 l 6 j U - 2 3/8

)

5,465 Supply Gas

From

Platform A South Timbalier Blook 107 Lease OCS-G 5601

To

Well No. 1 South Timbalier Blook 106 Lease OCS-G 9643

Pursuant to 30 CFR 250.3(a), approval to eliminate the FSV and the SDV on the aforementioned pipeline boarding the South Timbalier Block 106, Well No. 1 caisson is hereby granted.

Sincerely,

(Grig. Sgd.) A Donald Giroir D. J. Bourgeois Regional Supervisor Field Operations

bcc: [l5fl2-01 P/L OCS-G 12340 w/orig. appln (K.Faust) (MS 5232) 1502-01 P/L OCS-O 12340 w/oy of appln CWilliams (MS 5033) MS 5250

ABrittomdss 10/2/90:WP

/

ID

tele 017

1 <

TELEPHONE

17131 6 5 5 - 5 9 0 0

August 17, 1990


1201 LOUISIANA STREET, SUITE 3 2 0 0

HOUSTON, TEXAS 7 7 0 0 2 - 5 2 2 3

BEST AVAILABLE COPY

TELECOPIER

(713) 6 5 5 - 5 9 6 1

Mr. Daniel J. Bourgeois Regional Director U. S. Department of the Interior Minerals Management Service Gulf of Mexico OCS Region 1201 Elmwood Park Boulevard New Orleans, Louisiana 70123-2394

Attention: Ms. Carol Williams FO-2-2

RE: Application for a 2-3/8" O.D. Dehydrated Natural Gas Right-of-Way Pipeline to be Installed In and/or Through Blocks 106 and 107, South Timbalier Area, Gulf of Mexico, Federal Waters, Offshore, Louisiana

Gentlemen:

Zilkha Energy Company hereby requests a departure from 30 CFR 250.154 (b)(1) and (b)(2) whereby incoming pipelines must be equipped with a flow safety valve (FSV) and and automatic shutdown valve (SDV).

This departure is requested due to the fact that the flow to the caisson is effectively limited by the SDV on the South Timbalier 107 Platform "A", and the amount of gas contained in the pipeline is negligible.

If you should have any questions or need additional information, please call Mrs. Streati Hathcock, J. Connor Consulting at 713/558-0607.

Sincerely,

John B. Juneau Vice President

JBJ:SH:me

ST106.PL

RISER 100' 3 1/2" x 0.438' W.T. API 5L(42 ksi)

|

z •

1. ZILXHA ENERGY CO. FAOUTIES COMPLY WITH 30 OF 250, SUBPART J. ' A SHUTDOWN VALVE TIED INTO "mE PRODUCTION ES: SYSTEM iS USED ON THE PROOUCTICN FACILITIES.

3. 3 1/2* PIPELINE SHALL TRANSPORT GAS, CONDENSATE AND WATER.

4. ALL VALVES ANO FITTINGS ON 3 1/2' PIPELINE ARE API 5000. 2 3/8' PIPELINE SHALL TRANSPORT DEHYDRATED NATURAL GAS FOR WELLHEAD VALVE CONTROL ANC OPERATION OF THE WELLHEAD PANEL HYDRAUUC PUMP.

6. ALL FiTTlNGS CN 2 3/8 ' PIPELINE ARE ANSI 600#,

RISER 100' 3 1/2' x 0.438' W.T. API 5L(42 ksi)

V*\?* 44909 ^ - w

BEST AVAILABLE COPY REVISION BYjOAlEjCHt P A R A G O N

ENGINEERING S E R V I C E S HOUSTON.TEXAS

ZILKHA ENERGY COMPANY 1

P A R A G O N ENGINEERING S E R V I C E S

HOUSTON.TEXAS

SAhEir SCHEMATIC THREE PHASE PIPELINE

& INSTRUMENT GAS UNE


HOUSTON.TEXAS


& INSTRUMENT GAS UNE


HOUSTON.TEXAS


& INSTRUMENT GAS UNE 1 i CRAWN 1 CHECKED 1 APo90V^D JOB NO. 1 CRAMMC NUMBER • WT'

1 9Y | KAH 90293 90233-13-005 C 9 ISSUED FOR PERMIT IKHT-ÎBE 90293 90233-13-005 C

BEST AVAILABLE COPY UHITBD ST4TBS QOVBBHMENT MKIORAMDUI-J

August 29, 1990

To: Distriot Supsrvisor, Field Operations, GOK OCS R^lon (MS 5250)

Prom: Supervisor, Pipeline Unit, Plans and Pipeline Section, Field Operations, GOM OCS Region (MS 5232)

Subject: Elimination of FSV and SDV on the Incoming Pipeline

Transmitted herewith, for your review is a copy of Zilkha Energy Company's lett e r dated August 17, 1990, requesting approval to eliminate the FSV and the SDV on the following incoming pipeline on the South Tirabalier Block 106, Well No. 1 Caisson:

Pipeline Size Length Segment He. (inohes) (feet) Servioe From To

9169 2 3/8 5,465 Supply Platform A Well Ho, 1 (BOW OCS-G 12340) Gas Block 107 Block 106

South Timbalier South Timbalier Lease OCS-G 5601 Lease OCS-G 9643

(orlg. sgd.) K P. Alvarado

Alex Alvarado

cc: !1502-01 Zilkha Energy Company (MS 5232)

ABritton:lr:8/29/90

i

UNITED STATES GOVERNMENT MEMORANDUM

' i see mnd 3

FIELD ''%.OPERAinOWSi Sy. September 17, 1990

To: Supervisor, Pipeline Unit, Plans and Pipeline Section, Field Operations, GOM OCS Region (MS 5232)

From: District Supervisor, New Orleans District, GOM OCS Region (MS 5250)

Subject: Elimination of FSV and SDV on the Incoming Pipeline

We have received your memorandum dated August TT, 1990, with a copy of Zllka&s letter of August 17, 1990, requesting approval to eliminate the FSV and the SDV on the following incoming pipeline on the South Timbalier Block 106, Well No. 1 Caisson:

P1 pel Ine Segment No.

9169 (ROW 0CS~G 12340)

SIze Length (Inches) (feet) Service From To

2 3/8 5,465 Supply Platfonn A Well No. 1 Gas Block 107 Block 106

South Timbalier South Timbalier Lease OCS-G 5601 Lease XS~G 9643

We recommend approval.

Donald C. Howard

cc: Well No.l, OCS-G 9643 w/ltr & atch (MS 5250)

RP Kirk: ssw

BEST AVAILABLE COPY

AUG 3 1 1990

I n Reply Refer To: MS 5232 {OC?-G 12340)

Zilkha Energy Qxpany Attenticn: Mr. Jdm B. Juneau 1201 Louisiana, suite 3200 Houston, Texas 77002-5223

CcaitlafiGn:

Pursuant to the auttority granted by 43 U.S.C. 1334(0) and 30 CFR 250.150(b) and (a), your application dated August 1, sutplaiented August 14 and 31, 1990, for a pipeline right-of-way grant to-JcHhurxired feet (200*) i n width for the installation, operation, and naintenance of a 2 3/P-inch pipeline, 1.01 miles i n length, i s hereby approved, as proposed.

Tiie proposed pipeline w i l l transport supply gas froa Century Offshorc "'femagaiiGait Corporation's Platfonn A i n Biodc 107 to Zilkha Energy Ccrpany's Caisson NO. 1 i n Block 106, a l l i n the South Tirbalier Area.

Tlie right-of-'way grant and pipeline approval are subject to the followinn cenditienst

1. Our analyses iixlicate the follcwing- as potential hazards to tho propoeed a c t i v i t i e s . Therefore, precautions as outlined i n Notice to Lessees and operators No, 83-3, Secticn IV»B, shall be taken prior bo conducting operations:

a. Pipelino

:']ar.-e

Century Offsliore ranagenent Con oration

Dianeter (inches)

10

Block Area

106 South Ti-balier

V

b . VagnstLa Ancmalies

Plock Line ITo.

106 106

2 1

SliQt Po in t

6.5 6.2

\T7jlitude (; ultras)

930 1,350

31

2. Zilkha Jaiorgy Ccxpany's roquect to operate the supply gas pipeline without a boarding siûtdewn and flcvv safety valve i s being considered under a separate cover.

3. Zilkha Energy Ccxpany's regional Oi l Sp i l l Contingency Plan approved on August G, 1990, shall cover t l i i s pipeline operation.

BEST AVAILABLE COPY

Based on our analysis of your application, the naadnun allowable operating pressure fo r this pipeline w i l l be 1,480 psig.

Sincerely,

(Orig. Sgd.) William H. Martin

D, j . Bourgeois Recrional Supervisor Field Operations

bcc: |l5D2-01 (P/L OCS-G 12340) w/enclosures (K.Faust) (TIS 5232) 1502-01 (P/L OCS-G 12340) {C.WUlianB) 5033) m 5250 JC 5440

5421, w/receipt m 5232 Carto, w/plat

ABrittcmds: 8/31/90:^


August 1, 1990


CD

' R E C E I V E D '

AU60 2 199Q FIELD

OPERATIONS^ ^ 0 C S Regio"- ^



Gentlemen:

Pursuant to the authority granted in Section 5 (e) of the Outer Continental Shelf Lands Act (67 Stat. 462) (43 U.S.C. 1331), as amended (92 Sta. 629), and in compliance with the regulations contained in Title 30 CFR, Part 250, Subpart J, Zilkha Energy Company (Zilkha) is filing this application in quadruplicate (original and three copies) for a right-of-way two hundred feet (200') in width for the construction, maintenance and operation of a 2-3/8" O.D. dehydrated natural gas pipeline in the South Timbalier Area, Gulf of Mexico. Zilkha agrees that said right-of-way, if approved, will be subject to the terms and conditions of said regulations.

This 2-3/8 inch pipeline will be used to transport dehydrated natural gas from Century Offshore Management Corporation's (Century's) Platform "A", OCS-G 5601, in South Timbalier Area Block 107 to Zilkha's Caisson No. 1 in OCS-G 9643, South Timbalier Area Block 106. The pipeline will depart Century's Platform "A" in a southwesterly direction and traverse approximately 5,464.88 feet (1.035 miles) to Zilkha' Caisson No. 1., all being in the Gulf of Mexico, Federal Waters, Offshore Louisiana. The proposed construction commencement date is September 1, 1990, with the time required to lay the pipe being estimated at 7 days with an overall of project time being estimated at 10 days.

I20I LOUISIANA STREET. SUITE 3 2 0 0 • HOUSTON. TEXAS 7 7 0 0 2 - 5 2 2 3 TELEPHONE 17131 6 5 5 - 5 9 0 0 • TELECOPIER (713) 6 5 5 - 5 9 6 1

TELEX 7 9 8 - 6 7 9

Minerals Management Service Zilkha Energy Company's 2-3/8-Inch O.D. R-O-W Application

Page Two

This application (and any amendments made hereto) is made with our full knowledge and concurrence with the OCS Lands Act (43 U.S.C. 1331, et. seq.), as amended (P.L. 95-372), including the following: Sec. 5(e) addressing pipeline rights-of-way, requirements of the Federal Energy Regulatory Commission relating to notice of hearing, transportation and purchase of oil and gas without discrimination; Sec. 5(f)(1) addressing operation of pipelines in accordance with competitive principles, including open and nondiscriminatory access to both owner and non-owner shippers; Sec. 5(f)(2) which may allow exemption of the requirements in Sec. 5(f)(1); Sec. 5(e) addressing the assuring of maximum environmental protection, including the safest practices for pipeline installation; and Sec. 5(f)(1)(B) which may require expansion of throughput capacity of any pipeline except for the Gulf of Mexico or the Santa Barbara Channel.

Additionally, we expressly agree that i f any site, structure, or object of historical or archaeological significance should be discovered during the conduct of any operations within the permitted right-of-way, we shall report immediately such findings to the Director, Gulf of Mexico OCS Region, and make every reasonable effort to preserve and protect the cultural resource from damage until said Director has given directions as to its preservation.

In accordance with applicable regulations, we have forwarded information regarding the proposed project by certified mail, return receipt requested, to each lessee, right-of-way or easement holder whose lease, right-of-way or easement is so affected. A li s t of such lessees, right-of-way or easement holders is included as Attachment "A" and copies of the return receipts showing date and signature as evidence of service upon such lessees, right-of-way or easement holders will be forwarded to your office when received. In order to expedite the permit process, we have requested a letter from the lessee, right-of-way or easement holder expressing no objection to the proposed project. When obtained, these letters will be forwarded to your office. The proposed right-of-way does not adjoin or subsequently cross state submerged lands.

Applicant agrees to be bound by the foregoing regulations, and further agrees to comply with the applicable stipulations as set forth in the OCS Pipeline Procedures Guidebook dated March, 1984, revised September, 1984.

Minerals Management Service Zilkha Energy Company's 2-3/8" Inch O.D. R-O-W Application

Page Three

In support of our application and for your review and use, the following maps, drawings and documents have been enclosed herewith and made a part hereof:

1. Lessees and Right-of-Way Holders (Attachment "A")

2. General Pipeline Information and Calculations (Attachment "B")

3. Vicinity Map (Drawing No. 90293-13-002)

4. Route Map (Drawing No. 90293-13-004)

5. Safety Schematic (Drawing No. 90293-13-005)

6. Riser Guard/Boat Landing Plan (Drawing No. 90293-13-006)

7. Oceanonics, Inc. Engineering and Pipeline Pre-Lay Survey Report (2 copies)

8. Originally signed copy of Nondiscrimination in Employment Stipulation is attached to each copy of the application.

9. Check Nos. 03490 and 7769 dated July 31 and August 1, 1990, respectively in the amounts of $ 1,415.00 and $15.00, respectively, of which, $1400.00 covers the application fee and $30.00 covers the first years rental on 1.035 miles of right-of-way.

Contact on technical points or other information:

Susan Hathcock J. Connor Consulting P. 0. Box 218753 Houston, Texas 77218 Telephone: 713/558-0607

"Zilkha, hereby agrees to keep open at all reasonable times for inspection by the Minerals Management Service, the area covered by this right-of-way and all improvements, structures, and fixtures thereon and all records relative to the design, construction, operation, maintenance, and repairs, or investigations on or with regard to such area."

Minerals Management Service Zilkha Energy Company's 2-3/8-Inch O.D. R-O-W Application

Page Four

Please refer to your New Orleans Miscellaneous File No. 1138 for a copy of a resolution approved by the Board of Directors authorizing the undersigned to sign for and on behalf of Zilkha.

If the above information .meets with your approval, we would appreciate your issuing the necessary decision for the right-of-way at your earliest convenience. Inquiries concerning this application should be directed to our regulatory agent at J. Connor Consulting, P. 0. Box 218753, Houston, Texas, Attention: Ms. Susan Hathcock (713) 558-0607.

Sincerely,

lohn B. Juneau Vice President

JBJ:SH:bna Attachments and Enclosures

ATTACHMENT "A"

The following Lessees and Right-of-Way Holders have been furnished information regarding the proposed pipeline installation by Certified Mail, Return Receipt Requested.

Century Offshore Management Corporation 3900 N. Causeway Boulevard Suite 500 Mezzanine Metairie, LA 70002


Application to install and operate a 2 3/8" O.D. pipeline in South Timbalier Area, Blocks 106 and 107, Offshore Louisiana.

GENERAL INFORMATION

A. Location See Attached vicinity Map

From: Century Offshore Management Corp. South Timbalier Block 107 OCS-G 5601 - Platform A

To: Zilkha Energy Company South Timbalier Block 106 OCS-G 9643 - Well #1

B. Product Transported Dehydrated Natural Gas Gas - Density = .60 (air = 1.0)

C. Pipeline Length 5,465 feet (1.035 miles)

D. Pipe Data

Diameter (outside) Wall Thickness Weight Type and Grade Minimum Yield Strength Specific Gravity

E. Hydrostatic Test Pressure

Test Pressure (HTP) Hold Time Testing Medium

Line

2 3/8n

0.218" 5.02 #/ft. API 5L smls 35,000 psi 2.55

Risers

2 3/8" 0.218" 5.02 #/ft. API 5L smls 35,000 psi 2.55

1,850 psig 8 hours

Inhibited Seawater

F. Cathodic Protection The 2 3/8" line will be laid with the 3 1/2" line. Aluminum anodes from the 3 1/2" line will be electrically linked to the 2 3/8" line to provide cathodic protection for both lines. Anode design l i f e exceeds 20 years.

G. Protective Coating Fusion Bonded Epoxy - 12/14 mils

H. Water Depth 65 f t . - 80 ft.

I . Internal Corrosion Protection

No internal coating w i l l be used. Corrosion inhibitor w i l l be injected as required.

J . Flow Rate Minimal amount of instrument gas for wellhead control.

K. Line Pressures Anticipated Operating Design Pressure Maximum Source (MSP) Receiving F a c i l i t y MAOP

= 125 psi = 1,480 psi

285 psi = 285 psi

L. Valves and Fittings ANSI 600 lb.

M. Construction Schedule Start Duration

September 1, 1990 Approx. 7 - 1 0 days

N. Riser Protection - Riser w i l l be installed inside the boat landing at the caisson and the riser protector at the platform.

0. Pipeline Burial - Buried with 5' cover within 300' of platform and with 3' of cover for the remainder of route.

P. MAOP = 285 psi (Set by Receiving F a c i l i t y MAOP)

(1) Line Pipe

MAOP 2-S-t-F 2-(35.QQQ)-f ,218WPt72) (2.375)

(2) Riser Pipe

MAOP = 2 . s t F = 2.f35.00<n.r.218W0.5(n «p (2.375)

(3) Valves and Fittings

MAOP - ANSI Class 600 - 1,480 psi (100 oF)

= 4,626 psi

3,213 psi

(4) Hydrostatic Test Pressure Limits

Minimum = 1.25-(Design Pressure) = 1.25 x 1,480 = 1,850 psi

Maximum - 0.95-(SMYS) - 2-f35.000^ (.218)•ro.95^ = 6,104 psi (2.375)

/PROPOSED 3" a 2 ^PIPELINES

BEST AVAILABLE COPY

VICINITY MAP GULF OF MEXICO

SOUTH TIMBALIER AREA

REV. NO. REVISION BY OAIE CHX P A R A G O N

ENGINEERING SERVICES HOUSTON.TEXAS


VICINITY MAP

SOUTH TIMBAUER 106 & 107

P A R A G O N ENGINEERING SERVICES

HOUSTON.TEXAS


VICINITY MAP



HOUSTON.TEXAS


VICINITY MAP



HOUSTON.TEXAS


VICINITY MAP

SOUTH TIMBAUER 106 & 107 ••I!I3S!!IE5>^!lllK2k3353H JOB NO. ORAMNG NUMBER REV.

av 1 KAH 1 90293 90293-13-002 0 _2_ ISSUFO FOR PERMIT 90293 90293-13-002 0


August 13, 1990




Gentlemen:

Enclosed are four (4) copies of a revised route map for the 2-3/8" O.D. dehydrated natural gas right-of-way pipeline to be installed in and/or through South Timbalier Blocks 106 and 107. Please note the only change is that the pipeline will cross Century's 10" pipeline in South Timbalier Block 107 near Platform "A". This change was required by Century.

Also enclosed are four (4) copies of a a typical pipeline crossing schematic. Please include this information with the application submitted on August 1, 1990.

If you have any questions or need additional information, please call Mrs. Susan Hathcock, J. Connor Consulting at 713/558-0607.

Sincerely,

John B. Juneau Vice President

JBJ:SH:me

Enclosures

1201 LOUISIANA STREET, SUITE 3 2 0 0 • HOUSTON. TEXAS 7 7 0 0 2 - 5 2 2 3 TELEPHONE (7131 6 5 5 - 5 9 0 0 • TELECOPIER (7131 6 5 5 - 5 9 6 1

TELEX 7 9 8 - 6 7 9

i N

i

BEST AVAILABLE COPY GU,-.-" OF MEXICO

_R/W UMIT

PROPOSED ZILKHA P/L

R/W UMTT

ZILKHA ST 106 WELL No. 1 CAISSON X=2,304,355.86 Y= 10,664.08 LAT.=28,41 '33.11^

LONG.=90,23,03.40nW

OCS-G 5601

NOTE:

SOU MBALIER AREA

CENTURY OFFSHORE

ZILKHA ENERGY OCS-G 9643

-CENTURY PLATFORM WELL No. 2 X=2,307,392.68 Y= 14,461.51 LAT.=28,42,10.42,,N

LONG.=90,22,28.85"W

CENTURY P/L CROSSING X=2,307,323.40 Y= 14,348.03

PROPOSED ZILKHA 2" PIPELINE

2" PIPELINE IS TO BE BANDED WITH 3" PIPELINE Sc LAID ON THE SAME RIGHT OF WAY.

BLOCK CROSSINGS i - ^ X = 2,305,09&.fO ^ *:

Y = 1 0 , 6 6 4 ^ ^ 0 P E R ^ N S

LAN r=2ooo'

ZILKHA ST 106 WELL #1 CAISSON

M.LW. EL 0*-O"

CENTURY ST 10? PLATFORM WELL #2

BOAT LANDING

MUDLINE | Bj-jg-tt' I

Tn 8

RISER GUARD

PROFILE EXISTING 10 CENTURY P/L

REV. NO. REVISION BY DATE CHK P A R A G O N


ZILKHA ENERGY COMPANY PLAN AND PROFILE

PROPOSED 2" PIPELINE P A R A G O N ENGINEERING SERVICES

HOUSTON.TEXAS



HOUSTON.TEXAS



HOUSTON.TEXAS S.TIMBAUE R AREA BLKS. 106 fc 107 2 SHOW PA CROSSING KH 8-30 LD DRAWN CHECKED APPROVED JOB NO. DRAWING NUMBER REV.

1 NEW ROUTE KH 8-90 LD BY KAH 90293 90293-13-004 2 JL. ISSUED m PERMIT m OATE 7-26-90 90293 90293-13-004 2

9M

ucST AVAILABLE COPY

NOTES:

EXISTING PIPELINE (5* COVER, WILL NOT BE LOWERED)

1. CEMENT AND SAND MIXTURE SHALL BE 1 TO 3 PARTS BY WEIGHT. 2. BAGS SHALL BE MADE OF CLOSELY WOVEN MATERIAL WITH A WICKING ACTION. 3. BAGS SHALL BE CLOSED BY SEWING OR THE EQUIVALENT, BUT NOT BY BUNCHING AND TYING THE ENDS. 4. SANDBAGS SHALL WEIGH APPROXIMATELY 80#/BAG WITH .91 CU. FT. OF VOLUME PER BAG.

REV. NO. REVISION BY DATE CHK P A R A G O


ZILKHA ENERGY COMPANY 10" PIPELINE CROSSING

PROPOSED 3" k 2" PIPELINES SOUTH TIMBAUER AREA BLOCK 107

BY KAH DRAWN CHECKED APPROVED JOB NO. DRAWING NUMBER REV.

INITIAL ISSUE 90293 90293-13-007

CENTURY OFFSHORE MANAGEMENT CORP.

OCS-G 5601 . SOUTH TIMBAUER BLK 107 1

msmiuon GAS SCRUBBER

RISER 100' 3 1/2" x 0.438' W.T. API 51(42 ksi)

FROM ntooucnoN SEPARATORS

RISER 100* 3 1/2" x 0.438' W.T. API 5L(42 ksi)

GENERAL NOTES: 1. ZILKHA ENERGY CO. FACHJTIES COMPLY WITH 30 CFR

250, SUBPART J. A SHUTDOWN VALVE TIED INTO THE PRODUCTION ESO SYSTEM IS USED ON THE PRODUCTION FACIUTIES. 3 1/2" PIPEUNE SHALL TRANSPORT GAS, CONDENSATE AND WATER.

4. ALL VALVES AND FITTINGS ON 3 1/2" PIPEUNE ARE API 5000. 2 3/8" PIPEUNE SHALL TRANSPORT DEHYDRATED NATURAL GAS FOR WELLHEAD VALVE CONTROL AND OPERATION OF THE WELLHEAD PANEL HYDRAUUC PUMP.

6. ALL FITTINGS ON 2 3/8" PIPEUNE ARE ANSI 600#.

. , ZILKHA ENERGY CO. BEST AVAILABLE COPY OCS-G 9643

LEE OAVIO OANNER 44909

REV. NO. REVISION BY OATE OK P A R A G O N


ZILKHA ENERGY COMPANY SAFETY SCHEMATIC

THREE PHASE PIPEUNE k INSTRUMENT GAS UNE


HOUSTON.TEXAS




HOUSTON.TEXAS




HOUSTON.TEXAS



DRAWN CHECKED APPROVED JOB NO. ORAMNG NUMBER 1 REV. BY KAH

90293 90293-13-005 0 JL. ISSUED FQR PERMIL. 90293 90293-13-005 0

07/24 /90 17: SO PP882H0USTJ-CU 713/462_S5S4INC. 013

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SECTION A-A

REVISION •ESS

IHHTl3.Mi.l;«J3:JTlk«JTRn3iH3El»

P A R A G O N ENCINCCRINC SERVICES

HOUSTON.TEXAS

ZILKHA ENERGY COMPANY RISER GUARO/BOAT LANCMC

PLAN AND SECTION SOUTH TIMBALIER BLOCK 106

90293 90293-1 VOQg T 0 I

BEST AVAIUBLE COPY

UNITED STATES DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT SERVICE

NONDISCRIMINATION IN EMPLOYMENT

As a condition precedent to the approval of the granting of the subject pipeline right-of-way, the grantee, Zilkha Energy Company hereby agrees and consents to the following stipulation which is to be incorporated into the application for said right-of-way.

During the performance of this grant, the grantee agrees as follows:

During the performance under this grant, the grantee shall fully comply with paragraphs (1) through (7) of section 202 of Executive Order 11246, as amended (reprinted in 41 CFR 60-1.4(a)), which are for the purpose of preventing discrimination against persons on the basis of race, color, religion, sex or national origin. Paragraphs (1) through (7) of section 202 of Executive Order 11246, as amended, are incorporated in this grant by reference.

John B. Juneau. Vice President

July 31. 1990 Date

BEST AVAILABLE COPY

jWELINE RIGHT-OF-WAY AffUCATlON "ENGINEEIUNG CBEOUBT*

J / Sy?l . Sort of-Ptce

A. Deicrfption of pipefine and loetdon of propoad twite (U, *e of pipt. prodncl to be ^ ^ % trtiuporttd, from what to where, pUtfonn aunbcr. Mmt, Mock auabcr. area, ad dk- , ^ •, ^ tenet in feet aad adkt): 2 5 / f e - ^ c K A ^ A I W QAA^ ^ ^ ^ ^ h ^ ^ T T ' ^ ^

B. Sifety Flow Schematic - Verify that the infonnation AOWB en ttt nfety flow KiMsutk diairam cralains the foOowta|:

^ ^ 1 1 . fmBiit WBice ii dnwa into thc Khonatk wift Ae foBowte: « » ^ O ^ C I A A ^ L J (DOX

V dedgn wofkini presaire

c. high-tow presure tensor aettfaifi.

2. "ANSr ntinp of aD vahet, flaafes, and fittinp betwtea ttt aooiee aad the connectinft pipeline m ttow.. •

3. Preewre relief vaKes, where applicable, are ttown witt the wttfaf att ao Ughcr than the maxhnum working pitaaun (MWP) of ttt eaaiil

If the maxknum input louret pmaitt ii greater than the maximmn aDowaMe openting pmaitt (MAOP) of the pipeUne, redundant aafety equipment b required.

MAOP of proposed pipelint dots aot cuatd MAOP of eoaatcting pipeline.

Hit pipelint leaving ttt platform iictMng production ftom the platform ii equipped with high ow pmaiit aaaaon to directly or indirectly ttuHn the

or welli oa the platform.

7. Tbe pipeUne delivering production to the production facflitin oa the platfonn ii equipped with an automatic fafrcloat tahe tied into the automatic and remote ahuHn lyitem.

I. Hie pipeline crosfaig the pbtfonn whkh doea not delKer produciion to the platfonn. but which may or may aot mccKe productioa ftom ttt pbtfoim. ii equipped with high-low preouit aenson connected to an automatic faO-close valve located in the upstnam portion of the pipeline at the pbtfonn. In addition, the senson are tied into either the platform li automatic and itmote ihut-in lyitem or an independent remote ihut-fo lyttem.

BEST AVAILABLE COPY

— t. Tb* pfrdbe boBdini tt* pbtfoiafeipcfiM fe mpipftd a cfacfc frin.

JO. Tb«pJp«flntl«Tta| tht platfoia liaqalpp^wltt a cêinht.

l i l ^ L l l . ThehliMow pftmt maon ea ttt 4tp«ttol pIpcBnt fe loottd tttehtektaht.

y _ I - l l Where appBcable. hfclriow aeaaon an located dovwtieaa of tte hack: itfulator.

hJ/A \ 13. If thm ii Bquld iiv)ection into the Hue. an pumps anocfcted wilh the Mcctioa?

(Yea or No)

Direction of flow iadkalad.

.15. Kpc edfkationi (Le dze, gnde, weight, and wall ttkkaen).

.16. Total length of propoeed pipeBae (feet and ales).

MAOP of connecting pipdine.

.18. Statement that design meets or tx coeds DOT Regulations 193 or 195, aa applicable, and/or appUcable OCS orden, registered engineer's aeal, ngistntion number, date, and signa tun.

.19. Area and block number of proposed pipeline latfom.

.20. Cathodk protection spedfkations.

C Design Information • Verify that tte pipeUne design infonnation ghta bi ttt appUcation and/or ontj>»4fta ihtct is complete and comet:

_ 1. Product to bt tnnsported:,

^-ÎPipeUnc. rfcer. and aibsea vahe asaembly mctf^tions: ^ ^ ^

( 1 ) ^ WaO Thkkneas i

(2) Size WaB Ibkkncss Gnde Weight Ibs/ft

(3) Silt WaB Tbkkness Grade Weight Ibs/ft.

b. Rim: f ^ l E (DSbe WaB Thkkncss Grade Weight Ibs/ft.

(2) Size WaB Thkknea Gnde Weight Ibs/ft.

(3) Size WaB HUckness Gnde Weight fts/ft.

c. Subsea vaKe aaembly:

(1) Size WaB Thkkness Gnde Weight lbs/ft.

121 Size - WaB Thkknea Gnde Weight lbs/ft.

BESTAVMLABUCO?*-

4. Type of eorroriofl prottetfan:

_ _ _ _ _ a. impicnad curtaf fjrttan

b.SacrifiriaJanodei

(1) Typo of anode

(2) Spaeint tolmal .ft. ^ 3 ^

(3) Wefcht of anh anode gKaa by applicant ta. oa.

c. If platform anodes ait aaed, ait they conaideied adequate?

d. If pipeline anodes are i

Formula: U p / ! • 3J2xIO 4*W«/D1R-

Where: W« - Weifht of Anode anh (Ibi) D "Dia. of pipe (inches) 1 • Separation between anodes (ft.) R • the foOowini Ibs/ampfrtar (Rate of Conauaption) Aluminum or CaKahim » 7^ Zinc •26 Magnesium -17 J

Docs the calculated life expectancy equal or exceed 20 years?

Yes No

S. Description of protective coatfaig:

b. Riser

c. Subtta vaKe attfinbty

Description of weighted coating:

a. Preconcrete coating _ _ _

b. Density of concrete _ _ _ _ PCF

c. Thkknes

d. Thkknes of asphalt _ _ _ _ _

7. CalcuUte the êciTic gnvity (one of the foOowing formulae may be uied)

BEST AVWLABL COPY

LFortpoxycoalfair IC-IMSW/D2 /

b. Dcadty coapsfcoa wfth fhUd aatnU: tC« Wjf A

c. Una with • cdfk thk|iMief i

SG-RC^JC, Q^P-ttf

d. Lia« hivtaf two ooittap of a n d ad • fth wnp, or oaly aphatautk eoatinf:

3

Whtrt: SG • ipcdflc gnrity RC • dtndty of coneittt (Ib/ca. fi) K j . Kj. K3 • eotffkitatt T • thKknta of concntt coadng (inchtf) W • weight of ban pipt (lb/ft) ? • weight of coating R • density of fluid material (Ib/ai. ft); I A , aee wattr • 64 Ihc/cu. ft. D • diameter of pipe (inches) A • CTOSMecdond ana

gravity

b. c

9. Gnvity or density of producKs).

.10. Design capacity of pipeline —

1 Hold Tine .11. Given Hydrostatic Tttt Pnssun: lint Pipe _ Hold Tbne hn.

PninsuDation Test _ Riser Hold Time _bn.

Recommended maximum hydrostatic body last for ANSI eaKes, flanges, and flttingi an as follows:

ANSI 300-1.100 psig ANSI 400 • 1,450 psig ANSI 600 • 2,175 psig ANSI 900 • 3.250 psig ANSI 1400-5.400 pdg

BEST AVAILABLE COPY Not*: MiafamuB hold

Umftpt-thn. Gu • Riser • 4 hn. (pntctt)

or DOT 193.507(e)

4hn.€l2S*aflfOF liquid- Phis 4 his. €110* If leak

HM b aot tfabk tfuiioj

42. UaxinofflAIovabk Opcntini Pnaun (MAOP) of UM pipe: .

MAOP-2 tlx Fx Ex T Note: F*.72:E« 1;T« 1

—

1 ^

Note: F • .50 for risen on natural ps franamlaioa Unes. Note: F«.«0 for risen on liquid pipelines.

a. MAOP*

b. MAOP-

14. MAOP of fltnies, Aninis. and valves

2.4 x ANSI ntini

15. MAOP of proposed pipeline a detenniiMlin accordance with Title 49 CFR Part 195 or 192, as appUcable. b ( >4KU ^

.16. Items 12.13. and 14 above an equal to or mon Aan the maximom allowable workini pnssun (MAWP) of source.

.17. Verify: 1:25 maximum source pnssun (MSP) < hydrostatic lest pnsnn (HTPi < .95 (smafler IP # SMYS of items 12 or 13 above)

Note: The ncommended ttmit of test a a pcrccntafe of internal pressun t specifked minimum ykld stnnfth b equal to 9S'A:

IPf SMYS-2xix f

.18. Verify MAOP does not exceed the lowest of the foDowin|:

a. Suomerted component*: HTP/1J5-

b. Riier: HTP/1.5-4&9

j r f • y * « ^ Y - N o BEST AVAILABLE COPY D. bftillatio

AS plpc!ln« wffl bc bntalM or hid to • mWrawa of Am fed below Ac 1ml of tjve modline out to and Inchidini Ae 300 foot water depth, except at pipcliM

ip. Any deviatfoe moat be Jmdfled at th* Ane of applkstfon.

All vaKee and tape moit be provided with a minfanum of three feel of actnal cover either with eofl or ondbap or Jetted to a odnfanam of Am feet below Ae mudline If approved vahc protection coven an ued, the vaha and taps an NOT required to have a minimum of thm feet of actnal cover or Jetted Am feet below Ae mudline. However, Ae top of the vahc protection com AaO not protrude above Ae level ef Ae modliae. Aay deviatioa mast be Justified at Ae Anc of application.

E Pipeline Craasinp:

1. Afl pipeline crossinp fat water depths vp A and tacfedlng 300 fact AaO be cemcntbaited with a minfanum of 18 inches between Ae Unes with Ac appcr* most Knc havfaig a minfanum of 3 feet of cover hi Ae form of cement bap Installed so as A provide a Am foot horizontal to a one foot verdcal (3 :1) slope with a crown width Aat Is one and one-half (IH) Anas Ae pipe diameter. Any deviation must bejuitifkd at the tfanc ef application.

3. Afl pfpcBne crossinp fat water depAs peater Aan 300 fm AaS be cement baited with a minimum of 18 inches between Ae lines and fautafled so as to provide a Am foot horixontal to a one foot verdcal (3:1) slope. Any deviation must be Justified at Ae tfanc of applicatioa.

F. Construction Information

J r - ^ ^ Proposed coastiucdoa commencement date o^-p^ /

3. Me tf»od of constmction

3. Method of bwial

1. Time required toby pipe T- ^ C X ^ j O ^

5. Tfanc required to compkte project ^(3 C S C U L A Q ^

C. AppUcint complies wiA current OCS pipeline pridclines: '- '

CCR.)

BEST AVAILABLE COPY

r - r j

"0 0 <

/I G O !>r 0 .SWI av>f< X 7,6,

2 ^ Bi^ -f/:c-


1201 Louisiana, Suite 3200 Houston, TX 77002

713/655-5900

August 31, 1990 SEPO 41990

v IFlEUBi \ . OPERATOONS J>


Attention: Mr. Autry Britton FO-2-2

RE: Application for a 2-3/8" O.D. Dehydrated Natural Gas Right-of-Way Pipeline and a 3-1/2" O.D. Natural Gas Pipeline Right-of-Way to be Installed In and/or Through Blocks 106 and 107, South Timbalier Area, Gulf of Mexico, Federal Waters, Offshore, Louisiana

Gentlemen:

Zilkha Energy Company submitted the referenced pipeline applications on August 2, 1990. The applications stated the pipeline lengths were 5,464.88' (1.035 miles). On August 14, 1990, revised route maps were submitted due to the fact that Century Offshore Management Corporation (operator of South Timbalier 107 "A") required the pipelines to come up a different leg of the structure. The correct pipeline lengths are 5,352.7' (1.01 miles) as indicated on the revised route maps submitted August 14, 1990.

If you have any questions, please call Mrs. Susan Hathock of J. Connor Consulting at 713/558-0607.

Sincerely,

9-J. Bradley Juneau Vice President, Exploration

JBJ:SH:me

UNITED STATES GOVERNMENT MEMORANDUM

August 31, 1990

To: Regional Supervisor, Field Operations, GOM OCS Region (MS 5200)

From: Regional Supervisor, Leasing and Environment, GOM OCS Region (MS 5400)

Subject: National Environmental Policy Act Review for Pipeline Right-of-Way Application OCS-G 12339, 12340

Our National Environmental Policy Act (NEPA) review of the

subject action i s complete. Environmental protective measure(s),

i f any, identified to avoid or mitigate potential impacts

associated with the action were included as part of the NEPA

analysis and are shown on the Categorical Exclusion Review (CER).

,iJ. Kenneth Adams

Attachment

cc: Pipeline F i l e OCS-G 9643 and 5601 (MS 5440)

Action No. OCS-G 12339 and OCS-G 12340

United States Department of the Interior Minerals Management Service Gulf of Mexico OCS Region

NEPA CATEGORICAL EXCLUSION REVIEW

The Categorical Exclusion Review (CER) evaluated the proposed action(s) and determined that i t meets the categorical exclusion c r i t e r i a as defined by 516 DM 2.3A(1) which states "(a) The action or group of actions would have no significant effect on the quality of the human environment, and (b) The action or group of actions would not involve unresolved conflicts concerning alternative uses of available resources." The exclusion of this activity from future environmental analysis i s conditioned on the imposition of the following mitigative measure(s). These measures are to ensure environmental protection, consistent environmental policy, and safety as required by the NEPA.

Environpiental Protective Measures

The following measure was identified in the plan/application by the lessee/operator submitting the proposal: None.

The measures identified by MMS during the plan/application review or in the lease stipulation were:

1. Our analyses indicate the following as potential hazards to the proposed a c t i v i t i e s . Therefore, precautions in accordance with NTL No. 83-3, Section IV.B, w i l l be taken prior to conducting operations.

Pipelines

Name

Century

Diameter (inches)

10 inches

Block

106

Area

South Timbalier

Blocks Line No. Shot Point Remarks or Amplitude (gammas)

106 106

2 1

6.6 6.2

930 1350

I;yc ^ ion peteppi tion The proposed action was evaluated and reviewed against the CER exception criteria defined by 516 DM 2.3.A(3). With inclusion of the above mitigation, i t does not represent an exception to the categorical exclusions. Therefore, preparation of an EA i s not required.

Date PreppXer [/ Date' ^^ytiLat ,/Environmenta^^, perations Section

I concur.

Date \ Rational Supervisor, sasing and Environment

Mr. Daniel J. Bourgeois Regional Supervisor ^ RFnnvED % o 1993 · 2020. 1. 16. · Stb.. - 10th. Principal Zilkha Energy Company 1201 Louisiana, Suite 3200 Houston^ Texas 77.0.02-5223.

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