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CO 190
Conservation Order 190 Kuparuk River Field Kuparuk River Oil Pool 1. May 2, 1983 Arco's request to revise surface case setting depths (2Z pad) 2. May 6, 1983 Notice of public hearing and affidavit of publication 3. May 22, 1985 Arco's request for AA (CO 190.004) 4. November 9, 1988 Arco's request for AA (CO 190.005) 5. May 15, 1990 Arco's request for AA (CO 190.010) 6. September 9, 1992 Arco's request for AA (CO 190.013) 7. December 2, 1992 Arco's request for AA (CO 190.014) 8. June 23, 1993 Arco's request for AA (CO 190.015) 9. August 27, 2001 Email re: 2K-27 Surface Casing Setting Depth (CO 190.016) Conservation Order 190 Kuparuk River Field Kuparuk River Oil Pool STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION 3001 Porcupine Drive Anchorage, Alaska 99501 Re: THE APPLICATION OF ARCO ) Conservation Order No. 190 ALASKA, INC. for an order ) granting an exception to ) Kuparuk River Field Rule 4(c) of Conservation ) Kuparuk River Oil Pool ORDER No 173 for wells to ) be drilled from three drill ) pads in the Kuparuk River ) Field. ) May 16, 1983 IT APPEARING THAT: 1. ARCO Alaska, Inc., by letter dated May 2, 1983, requested the Alaska Oil and Gas Conservation Commission to issue an order granting an exception to Rule 4(c) of Conserva- tion Order No. 173 to allow the surface casing to be set as deep as 3250 feet true vertical depth in develop- ment wells on Drill Pads 2Z, 2X, and 2C. 2. Notice of public hearing was published in the Anchorage Times on May 6, 1983. 3. There were no protests to the application. FINDINGS: 1. The Ugnu sands and the West Sak sands are hydrocarbon - bearing and potential reservoirs in some areas of the Kuparuk River Field. 2. The West Sak sands are hydrocarbon -bearing in the area of Drill Pads 2Z, 2X, and 2C but the Ugnu sands are not. 3. The oil in the West Sak sands has a low solution GOR, no known gas oil contact and, on production tests, has never flowed to the surface except with an artificially heated wellbore. 4. In the areas of the three referenced drill pads, the Ugnu and West Sak sands are structually located so as to be at or near the maximum surface casing -setting depth of 2700 feet true vertical depth prescribed in Rule 4(c) of Conservation Order No. 173. Conservation Order*. 190 Page 2 May 16, 1983 5. To set surface casing in this area prior to penetrating the Ugnu and/or West Sak sands, may not provide the required 500 feet of cement between the base of the permafrost and the bottom of the casing as required by Rule 4(c). 6. The West Sak reservoir in the area of the three refer- enced drill pads will be better protected if it is cemented above the shoe of the surface casing rather than several thousand feet above the shoe of the produc- tion casing. 7. The first two wells on Drill Pad 2Z were drilled in compliance with Rule 4(c) of Conservation Order No. 173. Analyses of well operations disclose that West Sak sands may be penetrated and safely controlled with drilling fluid densities of 10.0 pounds per gallon. CONCLUSIONS: 1. If the first well on each of the referenced drill sites is drilled and cased in accordance with existing pool rules and the data from the well does not indicate any gas sands between the base of the permafrost and the base of the West Sak Sand and the West Sak Reservoir has the same characteristics as now attributed to it, there does not appear to be a safety problem in drilling through the sands with only a conductor casing and a diverter stack as long as a drilling fluid with a density of 10.0 pounds per gallon is used. 2. The surface casing requirements of Conservation Order No. 173 are necessary but modifications of the setting depth at the areas of the referenced pads will not be a safety hazard and will protect the permafrost. 3. A specific maximum depth for the setting of surface casing should be established for each individual drill pad. NOW, THEREFORE, IT IS ORDERED THAT: Rule 1. Drill Pad 2Z. Remaining Drill Pad 2Z Kuparuk River Pool wells may be drilled to a maximum depth of 3250 feet true vertical depth before surface casing is set so long as drilling fluid densities are monitored and mantained at 10.0 pounds per gallon. Conservation Ordeo. 190 Page 3 May 16, 1983 Rule 2. Drill Pads 2X and 2C. The first well on each of these pads will be drilled in compliance with Conservation Order No. 173. If the data from each well shows that (1) there are no shallow gas sands, (2) drilling fluid density provides well control and (3) the West Sak reservoir is not a potential drilling hazard; then the remaining wells on each pad may be drilled to a maximum depth of 2975 feet true vertical depth before surface casing is set. Rule 3. In the event that geologic conditions are not as anticipated, the Alaska Oil and Gas Conservation Commission may change the maximum depth for setting the surface casing by Administrative action, provided a request, in writing, is timely submitted. DONE at Anchorage, Alaska and dated May 16, 1983. 0JL '!ON co��� C. V. C atterton „ Alaska Oil and Gas rian-rman Conservation Commission Harry W,/ Kugler, Vommissioner Alaska Oil and Gas Conservation Commission N k1briinie G. 5iitti, uommissioner Alaska Oil and Gas Conservation Commission September 28, 1933 .A D -1-1 -1 to' I S T I V F A P P R 0 V A L NO. 190.1 Re: The application of ARCO Alaska, Inc. to drill to 3350 feet true vertical depth before setting the surface casing in the Kuparuk River Unit !To. 1F-16 well. Mr J. B. Kewin Area Drilling Enginer ARCO Alaska, Inc. P. 0. Box 100360 Anchorage, Alaska 99510 Dear Mr. Kewin: The referenced application was received on September 213, 1983 and stated that a deeper surface casing depth in the referenced well would alloy q cased bole drill stem test of the .test Sak Sands while not affecting the Kuparuk River production casing. The application further stated that the Vest Sak reservoir could be safely drilled using a 9.5 ppg mud and that no pressure anomalies exist as evidenced in the drilling of 11 previous wells from. the IF pad. The Alaska Oil and Cas Conservation Comnission hereby authorizes the drilling of the referenced well to a depth of 31150 feet true vertical depth before setting surface casing pursuant to Rule 3 of Conservation Order Vo. 190. , Yours very truly, Harry W. Kugler Comm ssioner BY ORDFR OF THE COMMISSION be October 13, 1983 A D M I N I S T R A T I V E A P P F 0 V A .190.27 he: The application of ARCO Alaska, Inc. to drill to 3481 feet true vertical depth before setting the surface casing in the Kuparuk Piver Unit No. IF-16 well. I mr. J. B. Kewin Area Drilling Engineer ARCO h1aska, Inc. P. 0. Box 100360 Anchorage, Alaska 99510 Dear Mr. Kewin: The referenced application was received on October 12, 1983 as part of the drilling permit for the referenced well and stated that a deeper surface casing depth than that granted by Adminis- trative Approval No. 190.1 was necessary because of a depth correction on the base of the Vest Sak, Sands and to Provide room for fill during a planned drill aterr, test of the tVest Sak Sands. The safety of drillin.q to this dept'� using only a diverter system has been considered in the granting of Adminis- trative Approval No. 190.1 and the purpose for the deeper casing setting depth is to conduct a cased hole drill stem test of the West Sak Sands. "b I.e Alaska oil and Gas Conservation Corimission hereby autilorizes the drilling of the referenced well to a true vertical depth of 3481 feet before setting 9-5/8 inch surface casing pursuant to Rule 3 of Conservation Order No. 190. Yours very truly, Harry W. Kugler Coininissioner BY ORDER OF THE COMMISSION be November 1, 1983 A D M I TV I S T R A '1' 1 V E A P P R 0 V A 1, 70. 1010.3 Re: The application of ARCO Alaska, Inc. to drill to 3200 feet true vertical depth before setting tbe surface casing in the Kuparuk River Unit No. 2V-1 and No. 2F-5 wells. Mr. J. B. Kewin Area Drilling fngineer ARCO Alaska, Inc. P. 0. Box 100360 Anchorarie, Alaska 019510 L_ Dear Vr. Yewin: The referenced application was received on October 31, 1933 and stated a deeper surface casing depth in the referenced wells would allow for better isolation of the ;Jlest Sak Sands, the potentially productive sands would be better protected by ccrient and the sands can be safetly penetrated using a 9.8 ppt7. drilling fluid and a flow diverter stack on the conductor casing. it was further stated t1*Iat several wells drilled from the 2Z, 2Y, and 2C pads have been safely drilled with a deeper surface casing depth than allowed by Conservation Order 'No. 173. The Alaska Oil and Cas Conservation Commission hereby authorizes the drilling of the referenced wells to a depth of 3200 feet true vertical depth before setting surface casing pursuant to Pule 3 of Conservation Order Tplo, 190. Yours very truly, Harry 1,1. Kupler Cormissioner BY ORDER OF TUE COMMISSION be May 23, 1985 ADMINISTRATIVE APPROVAI, NO. 190.4 Re: The application ofARCO Alaska, Tnc. to deepen the maximum surface casing setting depth to 3450 feet true vertical depth for all future wells to be drilled on the 2Z pad. ;fir. J. B. Kewin Area Drilling Engineer ARCO Alaska, Tnc. P. 0. Fox 100360 Anchorage, Alaska 99510-0360 Dear Mr. Kewin: We have received your application., dated May 22, 1985, requesting_ permission to set surface casing as deep as 3450 feet for all future wells to be drilled on the ?Z pad in the Kuparuk River Field. The Commission has studied the data presented and the data already available and finds that the request will not cause waste or be on unsafe practice. Therefore, by this letter, the Alaska Oil and Gas Conservation Commission permits the setting of surface casing as deep as 3450 .`eet true vertical depth for all wells to be drilled on the 2Z pad in the Kuparuk River Field. This action is taken pursuant to Rule 3 of Conservation Order No. 190. Yours very truly, Harry W. Kugler, Co*mi. s s i_oner BY ORDFi? OF THE COnITSSION be:3.AA190 Telecopy No. (907) 276-7542 December 2, 1988 ADMIN I STRATIVE APPROVAL N 0. 190.5 Re: The application of ARCO Alaska, Inc to deepen the surface casing setting depths for Kuparuk wells 34-11-10 No. 1; 9-12-10 No.1; and 3-11-8 No. 1. J B Kewin Regional Drlg Eng ARCO Alaska, Inc P 0 Box 100360 Anchorage, AK 99510-0360 Dear Mr Kewin: We have received your application dated November 9, 1988 requesting approval to set the surface casing in three proposed Kuparuk River wells at maximum depths as follows: Kuparuk 34-11-10 No. I at 3400' TVD Kuparuk 9-12-10 No. 1 at 3700' TVD Kuparuk 3-11-8 No. 1 at 2900' TVD The Commission has studied the data presented, and data already available, and finds that the request will not cause waste or be an unsafe practice. Therefore, pursuant to Rule 3 of Conservation Order No. 190, the Commission hereby authorizes the setting of surface casing in the three proposed Kuparuk River wells at maximum depths as follows: Kuparuk 34-11-10 No. 1 at 3400' TVD Kuparuk. 9-12-10 No. 1 at 3700' TVD Kuparuk 3-11-8 No. 1 at 2900' TVD Six 1cerely, r— "onnie C Smith Commissioner BY ORDER OF THE COMISSIOIL jo:BEW/3.AA190 Telecopy No. (907) 276-7542 April 19, 1988 ADMIN ISTRAT IVE APPROVAL N 0. 190.6 Re: The application of ARCO Alaska, Inc to deepen the surface casing setting depth to 3000 feet true vertical depth for all future wells to be drilled on the 2K pad. J B Kewin Regional Drlg Eng ARCO Alaska, Inc P 0 Box 100360 Anchorage, AK 99510-0360 Dear Mr Kewin: We have received your application dated April 13, 1989 requesting permission to set the surface casing as deep as 3000 feet for all future wells to be drilled on the 2K pad in the Kuparuk River Field. The Comiaission has studied the data presented, and data already available, and finds that the request will not cause waste or be an unsafe practice. Therefore, by this letter, the Alaska Oil and Gas Conservation Commission permits the setting of surface casing as deep as 3000 feet true vertical depth for all wells to be drilled on the 2K pad in the Kuparuk River Field. This action is taken pursuant to Rule 3 of Conservation Order No. 190. Sincerely, 4-1 Lonnie C VSMLb ith Conmissloner BY ORDER OF THE C0114ISSION dlf:RAD/3.AA190 I d M Telecopy No. (907) 276-7542 August 1, 1989 A D 1% 1 N I S T R A T I V E A P P R 0 V A L N O. 190.7 Re: The application of ARCO Alaska, Inc to deepen the surface casing setting depth to 3452 feet true vertical depth for all future wells to be drilled on the 2K pad. J b Kewin Regional Drlg Eng ARCO Alaska, 1nc P 0 Box 100360 Anchorage, AK 99510-0360 Dear Mr Kewin: We have received your application dated August 1, 1989 requesting permission to set the surface casing as deep as 3452 feet for all future wells to be drilled on the 2K pad in the Kuparuk River Field. The Commission has studied the data presented, and data already available, and finds that the request will not cause waste or be an unsafe practice. Therefore, by this letter, the Alaska Oil and Gas Conservation Commission permits the setting of surface casing as deep as 3452 feet true vertical depth for all wells to be drilled oil the 2K pad in the Kuparuk River Field. This action is taken pursuant to Rule 3 of Conservation Order No. 190. Sincerely, --I Lonnie C dm�ith Commissioner BY ORDER OF THE COMMISSION LCSjo/3.AA190 Telecopy No. (907) 11-76-7542 january 22, 1990 ADMTNT S T R A T T V E A P P R 0 V A T, N 0. 190.8 Re: The application of ARCO Alaska, "Ine to deepen the surface casing setting depth for Kuparuk River Unit State #1-14-I0-9. Pat Archey Area DrIg Eng ARCO Alaska, Tnc P 0 Box 100360 Anchorage, AK 99510-0360 Dear Mr Archey: We have received your application dated December. 27, 1989 requesting approval to set the surface casing in the Kuparuk River Unit State 01-14-10-9 at a maximum depth of 3408' TAM. The Commission has studied the data presented, and data al-readv available, and 5inds that the request will not cause waste or be an unsafe practice. Therefore, pursuant to Rule 3 of Conservation Order llo. 190., the Commission hereby authori--es the setting of surface casing in the Kuparuk River Unit State #1-14-10-9 at a maximum depth of 3408' TVD. Sir,vcerel Lonnie C Smth Commissioner BY ORDEIR OF ME COMMTSSTON d1f.-RAD/3.AA190 Telecopy No. (907) 276-7542 January 22, 1990 A D M Z N I S T R A T I V E A P P R O V A L N 0. 190.9 Re: The application of ARCO Alaska, Inc to deepen the surface casing setting depth for Kuparuk River Unit State 2-16-10-10. Pat Archey Area Drlg Eng ARCO Alaska, Inc P 0 Box 100360 Anchorage, AK 99510-0360 Dear Air Archey: We have received your application dated December 27, 1989 requesting approval to set the surface casing in the Kuparuk River Unit State #2-16-10-10 at a maximum depth of 3839' TVD. The Commission has studied the data presented, and data already available, and finds that the request will not cause waste or be an unsafe practice. Therefore, pursuant to Rule 3 of Conservation Order No. 190., the Commission hereby authorizes the setting of surface casing in the Kuparuk-River Unit State 12-16-10-10 at a maximum depth of 3839' TVD , Sincerely,, Lonnie C Smith Commissioner BY ORDER OF THE COMMISSION dlf:RAD/3.AA190 Telecopy No. (907) 276-7542 1-ay 16, 1990 A D M I N I S T. R A T T V E J- A P P R 0 V A L N 0. 190. 10 Re: The application of ARCO Alaska, Inc to deepen the surface casing setting depth to 3500 feet true vertical depth for all future wells to be drilled on the 3C pad. J B Kewin Area Drlg Eng ARCO Alaska, Inc P 0 Box 100360 Anchorage, AK 99510-0360 Dear Ytr Kewin: We have received vour application dated May 15, 1989 requesting permission to set the surface casing as deep as 3500 feet_ for all future wells to be drilled on the 3G pad in the Kuparuk River Field. The Commission has studied the data presented, and data already available, and finds that the request shall not cause waste. Therefore, by this letter, the Alaska Oil and Gas Conservation Corknission permits the setting of surface casing as deep as 3500 feet true vertical depth for all wells to be drilled on. the 3G pad in the Kuparuk River 'Field. This action is taken pursuant to Rule 3 of Conservation Order No. 190 Sincerely, cormissioner BY ORDER OF T14E COMATSSION 'A.- d1f:RAD/3.AA190 • • November 9, 1990 Telecopy No. (907) 276-7542 A D M I N I S T R A T I V E A P P R O V A L N 0. 190.11 Re: The application of ARCO Alaska, Inc to deepen the surface casing setting depth to 3900 feet true vertical depth for all future wells to be drilled on the lA pad. R. F. Morgan Regional Drilling Engineer ARCO Alaska, Inc P 0 Box 100360 Anchorage, AK 99510-0360 Dear Mr Morgan: We have received your application dated November 5, 1990 request- ing permission to set the surface casing as deep as 3900 feet for all future wells to be drilled on the lA pad in the Kuparuk River Field. The Commission has studied the data presented, and data already available, and finds that the request shall not cause waste. Therefore, by this letter, the Alaska Oil and Gas Conservation Commission permits the setting of surface casing as deep as 3900 feet true vertical depth for all wells to be drilled on the lA pad in the Kuparuk River Field. This action is taken pursuant to Rule 3 of Conservation Order No. 190 Sincerely, ORIGINAL SIGNED BY LONNIE C. SMITH Lonnie C Smith Commissioner BY ORDER OF THE COMMISSION dlf:RAD/3.AA190 • OO WALTER J. NICKEL, GOVERNOR ALASKA OIL AND GAS 3001 PORCUPINE DRIVE CONSERVATION COMMISSION ANCHORAGE, ALASKA 99501-3192 PHONE: (907) 279-1433 November 12, 1991 TELECOPY: (907)276-7542 ADMINISTRATIVE APPROVAL NO. 190.12 Re: The application of ARCO Alaska, Inc. to deepen the maximum surface casing setting depth to 4200 feet true vertical depth for all future wells to be drilled on the Kuparuk River Unit 3R pad. A. Wayne McBride Area Drilling Engineer ARCO Alaska, Inc. P. O. Box 100360 Anchorage, AK. 99510-0360 Dear Mr. McBride: The Commission has received your application dated October 31, 1991 requesting permission to set surface casing as deep as 4200 feet true vertical depth (TVD) for all future wells to be drilled on the Kuparuk River Unit 3R pad. The Commission has reviewed the data presented and data already available and finds that the request is based on sound engineering principles and will not cause waste. Therefore, by this letter, the Alaska Oil and Gas Conservation Commission permits the setting of surface casing as deep as 4200 feet TVD for all wells to be drilled on the Kuparuk River Unit 3R pad. This action is taken pursuant to Rule 3 of Conservation Order No. 190. Sincerely, /L .eod. Russell A. Douglass Commissioner BY ORDER OF THE COMMISSION printed on recycled paper b y C.0. �- C� a0 a a o ;! 0 WALTER J. HICKEL, GOVERNOR ALASKA OIL AND GAS 3001 PORCUPINE DRIVE CONSERVATION CODIMISSION ANCHORAGE, ALASKA 99501-3192 PHONE: (907) 279-1433 September 18, 1992 TELECOPY: (907)276-7542 ADMINISTRATIVE APPROVAL NO. 190.13 Re: The application of ARCO Alaska, Inc. to deepen the maximum surface casing setting depth to 4100 feet true vertical depth for all future wells to be drilled on the Kuparuk River Unit 1H pad. R. F. Morgan Regional Drilling Engineer ARCO Alaska, Inc. P. O. Box 100360 Anchorage, AK. 99510-0360 Dear Mr. Morgan: The Commission has received your application dated September 9, 1992 requesting permission to set surface casing as deep as 4100 feet true vertical depth (TVD) for all future wells to be drilled on the Kuparuk River Unit 1H pad. The Commission has reviewed the data presented and data already available and finds that the request is based on sound engineering principles and will not cause waste. Therefore, by this letter, the Alaska Oil and Gas Conservation Commission permits the setting of surface casing as deep as 4100 feet TVD for all wells to be drilled on the Kuparuk River Unit 1H pad. This action is taken pursuant to Rule 3 of Conservation Order No. 190. Sincerely, Russell A. Douglass Commissioner BY ORDER OF THE COMMISSION printed on recycled paper b y C, h WALTER J. NICKEL, GOVERNOR ALASIf►A OIL AND GAS f/ 3001 PORCUPINE DRIVE CONSERVATION COMMISSION i ANCHORAGE, ALASKA 99501-3192 PHONE: (907) 279-1433 TELECOPY: (907) 276-7542 December 7, 1992 ADMINISTRATIVE APPROVAL NO. 190.14 Re: The application of Arco Alaska, Inc. to deepen the maximum surface casing setting depth to 4400 feet true vertical depth for all future wells to be drilled on the Kuparuk River Unit 1H pad. R. F. Morgan Regional Drilling Engineer ARCO Alaska, Inc. P. O. Box 100360 Anchorage, AK. 99510-0360 Dear Mr. Morgan: The Commission has received your application dated December 2, 1992 requesting permission to set surface casing as deep as 4400 feet true vertical depth (TVD) for all future wells to be drilled on the Kuparuk River Unit III pad. The Commission has reviewed the data presented and data already available, and finds that the request is based on sound engineering principles and will not cause waste. Therefore, by this letter, the Alaska Oil and Gas Conservation Commission permits the setting of surface casing as deep as 4400 feet TVD for all wells to be drilled on the Kuparuk River Unit 111 pad. This action is taken pursuant to Rule 3 of Conservation Order No. 190 and supersedes AA 190.13. Sincerely, Russell A. Douglass Commissioner BY ORDER OF THE COMMISSION ALASKA OIL AND GAS CONSERVATION CODIIDIISSION June 25, 1993 ADMINISTRATIVE APPROVAL 190.15 WALTER J. NICKEL, GOVERNOR 3001 PORCUPINE DRIVE ANCHORAGE, ALASKA 99501-3192 PHONE: (907) 279-1433 TELECOPY: (907) 276-7542 Re: The application of Arco Alaska, Inc.' to deepen the maximum surface casing setting depth to 4440' true vertical depth from rig kelly bushing (TVDRKB) for all future wells to be drilled on the Kuparuk River Unit 1 Y pad. R. F. Morgan Regional Drilling Engineer ARCO Alaska, Inc. P.O. Box 100360 Anchorage, AK 99510-0360 Dear Mr. Morgan, The Commission has received your application dated June 23, 1993 requesting permission to set surface casing as deep as 4440' TVDRKB for all future wells to be drilled on the Kuparuk River Unit 1 Y pad. The Commission has reviewed the data presented and data already available, and finds that the request is based on sound engineering principles and will not cause waste. Therefore, by this letter, the Alaska Oil and Gas Conservation Commission permits the setting of surface casing as deep as 4440' TVD for all wells to be drilled on the Kuparuk River Unit 1 Y pad. This action is taken pursuant to Rule 3, Conservation Order No. 190. Sincerely, X2-""Jff�' a-�� Russell A. Douglass Commissioner BY ORDER OF THE COMMISSION ALASKA ro���o OIL ss,o� � ADMINISTRATIVE APPROVAL 190.016 TONY KNOWLES, GOVERNOR 333 W. 7- AVENUE, SUITE 100 ANCHORAGE, ALASKA 99501-3539 PHONE (907) 279-1433 FAX (907) 276-7542 Re: The application of Phillips Alaska, Inc. to deepen the surface casing setting dept to 3899' true vertical depth from rig Kelly bushing (TVDRKB) for Kuparuk River Unit (KRU) well 2K-27 (PTD 201-169). Mr. Chuck Mallary Drilling Engineering Supervisor Phillips Alaska, Inc. P.O. Box 100360 Anchorage, AK 99510-0360 Dear Mr. Mallary: The commission has received Phillips' request from Mr. Todd Mushovic dated August 27, 2001 requesting permission to set surface casing at approximately 3899' TVDRKB for KRU well 2K-27 (PTD 201-169). The purpose of this request is to reduce drilling torque values by providing a longer surface casing section than originally planned. Commission Staff has reviewed your request and has made a recommendation to approve your proposal. This action is based on sound engineering principles and will not cause waste. The Commission hereby authorizes the setting of surface casing at approximately 3899' TVDRKB in KRU well 2K-27 (PTD 201-169). This action is taken pursuant to Rule 3 of Conservation Order No. 190. DONE in Anchorage, Alaska this 29th day of August 2001. Cammy chsli Tayl O#angielT. Seamount, Jr. Chair Commissioner BY ORDER OF THE COMMISSION �a \ a.!, Julie M. Heusser Commissioner !� �9� 2K-27 Surface casing setting depth. • Subject: 2K-27 Surface casing setting depth. Date: Mon, 27 Aug 2001 10:08:30 -0800 From: "Todd J Mushovic" <tmushov@ppco.com> To: tom_maunder@ad min. state. ak.us CC: "Charles R Mallary" <crmalla@ppco.com>, "Randy L. Thomas" <rlthomas@ppco.com>, "Sharon Allsup-Drake" <sallsup@ppco.com> Tom, Here are the items that we discussed this morning pertaining to setting the 7-5/8" surface casing deeper in 2K-27. The reason for deepening the surface hole is to lessen the torque values while drilling the bottom portion of the hole to the Timberline formation. There were no pressure/gas reasons to do this only to decrease expected torque values. Phillips Alaska recently finished drilling 2K-28 with Nordic 3 and no abnormal pressure/gas zones were encountered. The approved plan originally had the surface casing being set at 3629' MD and 2754' TVD. As per Rule 4(c) CO 190 the authorized surface casing depth is 3452' TVD. The revised casing depth would be -7000' MD and 3899' TVD. With the deeper surface casing depth our cement volumes would increase and to ensure cement to surface a TAM port collar would used. With your approval for the changes above a Form 403 would be sent documenting these changes. Thanks for your quick response. Todd J. Mushovic Drilling Engineer Phillips Alaska Inc. (907) 265-6974 - office (907) 240-5740 - cellular No 1 of 1 8/28/01 8:06 AM ARCO Alaska, Inc. 0 • Post Office Box 100360 Ad L Anchorage, Alaska 99510-0360 N OF Telephone 907-276-1215 June 23, 1993 Mr. D. W. Johnston Chairman of Commission State of Alaska Alaska Oil & Gas Conservation Commission 3001 Porcupine Drive Anchorage, Alaska 99501 Dear Mr. Johnston: 9W,�Cc (qj �sN SUBJECT: Revised Surface Casing Setting Depths Kuparuk River Field Pad 1Y This is a request for approval to vary from the existing Kuparuk River Field Rules, Conservation Order No. 173, to permit surface casing to be set as deep as 4,440' TVD RKB in infill wells on pad 1Y, which is an existing Kuparuk pad. This request references Conservation Order No. 190, Rule 3 which states a variance may be granted by Administrative action for the maximum surface casing setting depth. This depth will be below the West Sak and K-10 sands. In previous discussions with you and your staff, which resulted in the establishment of Conservation Orders No. 203 and No. 209, ARCO Alaska Inc. established a standard operating procedure of setting surface casing at least 200' TVD below the base of the West Sak sands. This request is for variance to set the surface casing 150' TVD below the K-10 sands on 1 Y pad. Attached is a diagram depicting a generalized well profile on 1Y pad. Also attached is a data sheet summarizing the thicknesses and contents of the shallow sands in previously wells drilled on 1Y pad. In reviewing our geological structure maps, it is estimated that for the 1 Y Pad, the base of the K-10 sands will occur at a maximum depth of 4,290' TVD. A surface casing depth of 4,440' TVD would ensure that the West Sak and K-10 sands would be isolated by the surface casing cement. A copy of ARCO's present Unit Development Status Map showing the location of the 1Y pad with respect to the existing development of the CPF-1, CPF-2, and CPF-3 areas is attached. Specific reasons for requesting a deeper surface casing setting depth are: It is preferential to set the surface casing at least to a depth of 4,440' TVD RKB which will be below the K-10 sands a minimum of 150' TVD. It is believed that the K-10 sands are a lost circulation zone while drilling with the mud weights of greater than 11.7 ppg required to control the Kuparuk reservoir pressure. This lost circulation zone has been the cause of top setting the Kuparuk sands and completing the well with a costly 5" liner. By isolating the K-10 sands with surface casing, the lost circulation zone will not be exposed to high c equivalent mud weights. R E C E IV E D J UN 2 41993 Alaska Oil & Gas Cons. commission Anchorage Mr. R. A.9glass • December 2, 1992 Page 2 2. A higher or equal formation integrity test at the surface casing shoe will be obtained by setting surface casing deeper prior to drilling into the Kuparuk sands. Although past formation integrity test data has been acceptable, drilling into the Kuparuk interval will be safer with a higher surface casing shoe integrity. 3. Information and experience gathered from previous Kuparuk development wells on 1Y pad indicate the West Sak and K-10 zones can be safely drilled using a diverter system on the conductor casing with a mud weight of 9.0 ppg. Although it is planned to drill the surface hole with a 10.0 ppg mud weight, there is no risk of lost circulation expected using mud weights as high as 11.0 ppg. In previous wells on 1 Y pad, the West Sak and K-10 sands were drilled with a maximum 9.1 ppg mud weight. Thank you for your consideration of this request. ARCO can furnish any further information you may need. Contact Dan Stoltz at 263-4208 if anything else is necessary. Sincerely, t N R. F. Morgan Regional Drilling Engineer RFM/DSS/mac Attachment cc: A. W. McBridei 1Y Pad General Wellfile RECEIVED J U N 2 4 1993 Alaska Oii & Gas Cons. Gommiss!"" Anchorage DS-1 Y SHALLOW DATA SUMMARY Surface Casing West K-10 Well If Shoe Ugnu Salk Sands Mudlog 1 Y-1 '83 above Ugnu wet oil no no 1Y-2 '83 above Ugnu wet oil 4250-4280 TVD wet 30' no 1 Y-3 '83 above Ugnu wet oil no no 1Y-4 '83 above Ugnu wet oil 4034-4038 TVD wet 4' no 1Y-5 '83 above Ugnu wet oil no no 1Y-6 '83 above Ugnu wet oil 3866-3893 TVD wet 27' no 1Y-7 '83 above Ugnu wet oil 3815-3832 TVD wet 17' no 1Y-8 '83 above Ugnu wet oil no no 1Y-9 '83 above Ugnu wet oil no no 1Y-10 '83 above Ugnu wet oil no no 1Y-11 '83 above Ugnu wet oil 3868-3870 TVD wet 2' no 1Y-12 '83 above Ugnu wet oil 3828-3831 TVD wet 3' no 1Y-13 '83 above Ugnu wet oil 3904-3914 wet 10' no 3990-4000 wet 10' 1Y-14 '83 above Ugnu wet oil no yes' 1Y-15 '83 above Ugnu wet oil no no 1Y-16 '83 above Ugnu wet oil no no 1Y-25 '88 base West Sak no logs no logs no no 1 Y-26A '88 base West Sak no logs no logs no no 1 Y-29 '88 base West Sak no logs no logs no no 1Y-32 '88 base West Sak no logs no logs no no 1 Y-30 '88 base West Sak no logs no logs 5577-5579 MD 2', wet no * 1Y-14 mudlog results: Ugnu sands - C1 methane in net sand zones - probably from coals, up to 200 units - tr. brn oil stain W. Sak sands - Oil-bearing 400-500 units, C1-C4 K-10 sands - no gas, no oil, no K-10 sands in this well K-5 & below - trace sand, local C1-C4 in shales above Kup beginnink �'; �0�' x 200 units background to top Ku tt JTE-jiz/504 JUN 2 41993 Alaska Oil & Gas Cons. Comm►ssion Anchorage • • 1 Y Generalized Well 1300' -2500' -2900' -3300' Surface Base Permafrost T. Ugnu Sands Expected Drilling Results Wet. Trace oil. Methane (Cl) up to 200 units of background gases from sands and/or coal beds T. West Sak Sands Oil-bearing, Cl-C4, 400-500 units of background gas Base West Sak Sands -3800' K-10 Expect 0'-30' TVD of sands below K-10 marker. 1Y-14: mudlog, no K-10 sands, no oil, no gas done) -4950' 1 K-5 Expect little to no gas K-5 to K-2 :!1 -6200' K-2 Expect up to 200 units of C1-C4 from shales between K-2 to Top Kuparuk. C3 . Kup Expect oil & C1-05 gas in mud C1 RECEIVED A JUN 2 4 1993 B. Kup Alaska Oil & Gas Cons. Gummissiu, TD Anchorage JTEJJIZ-505 KUPARUK RIVER UNIT MILNE PT STP OUKTOK PT SIMPSON LAGOON REEEI V ED JUN 2 41993 Alaska Oil & Gas Cons. Gommiss10 Anchorage ;OMM ARCO Alaska, Inc. 110 Post Office Box 100360 Anchorage, Alaska 99510-0360 Telephone 907-276-1215 SR SR EN ENG AS p' ENG AS 4 SR GEG_EO O_L A GE OL A December 2, 1992 STAT_TE S7AT TE FILE AA Mr. R. A. Douglass Commissioner State of Alaska Alaska Oil & Gas Conservation Commission 3001 Porcupine Drive Anchorage, Alaska 99501 Dear Mr. Douglass: SUBJECT: Revised Surface Casing Setting Depths Kuparuk River Field Pad 1 H On September 18, 1992, administrative approval was given to deepen the maximum surfacing casing setting depth to 4,100' TVD for future wells to be drilled on the Kuparuk River Unit 1 H pad. The most recent geologic prognosis indicate the West Sak sand is estimated to be approximately 300' deeper. This is a new request for approval to vary from the existing Kuparuk River Field Rules, Conservation Order No. 173, to permit surface casing to be set as deep as 4,400' TVD in development wells on pad 1 H, which is an existing peripheral Kuparuk development pad. In previous discussions with you and your staff, which resulted in the establishment of Conservation Orders No. 203 and No. 209, ARCO Alaska Inc. established a standard operating procedure of setting surface casing at least 200' TVD below the base of the West Sak sands. In reviewing our geological structure maps, it is estimated that for the 1 H Pad, the base of the West Sak will occur at a maximum depth of 4,200' TVD. A surface casing depth of 4,400' TVD would ensure that the multiple, discontinuous hydrocarbon -bearing sands occurring sporadically below the West Sak would be isolated by the surface casing cement. A copy of ARCO's present Unit Development Status Map showing the location of the 1 H pad with respect to the existing development of the CPF-1, CPF-2, and CPF-3 areas is attached. Specific reasons for requesting a deeper surface casing setting depth are: It is preferential to set the surface casing at least 200' TVD below the base of the West Sak sands. These West Sak sands can be better isolated with surface casing than the old practice of attempting to isolate the sands with cement from the production casing. From a general review of Kuparuk well data, it has been observed that at least 200' TVD below the base of the West Sak sands will adequately provide that the surface casing is set below any small oil stringers that are sometimes found below the West Sak formation. R EC E I DEC m 3 1992- Alaska Oil & Gas Cons, Cornmissio" Anchorage Mr. R. A.c'uglass December 2, 1992 Page 2 2. Abetter formation integrity test will be obtained prior to drilling into the Kuparuk sands. Although past formation integrity test data has been acceptable, drilling through the Kuparuk interval will be safer with higher surface casing shoe integrity 3. The West Sak hydrocarbon zones can be safely drilled using a flow diverter system on the conductor casing. On previous Kuparuk development wells, the West Sak was drilled safely with a drilling fluid density of 9.0 ppg. The West Sak reservoir pressure is approximately 8.6 ppg equivalent, with no known gas/oil contact and a low solution GOR. 4. Information and experience gathered from previously drilled pads in the Kuparuk River Field where the surface casing was set deeper than the established field rules indicates that the West Sak formation can be safely penetrated using a conductor/diverter system. Thank you for your consideration of this request. ARCO can furnish any further information you may need. Contact Dan Stoltz at 263-4208 if anything else is necessary. Sincerely, R. F. Morgan Regional Drilling Engineer RFM/DSS/mac Attachment cc: A. W. McBride 1 H Pad General Wellfile RECEIVED DEC - 3 119,92 Alaska Oil & Cas Cons. t;ornmtss4" Anchorage ARCO Alaska, Inc. i Post Office Box 100360 Anchorage, Alaska 99510-0360 Telephone 907-276-1215 September 9, 1992 Ms. L. A. Griffin Commissioner State of Alaska Alaska Oil & Gas Conservation Commission 3001 Porcupine Drive Anchorage, Alaska 99501 Dear Ms. Griffin: - �.�n//ac �i �Yr� ✓eJrdNt t SUBJECT: Revised Surface Casing Setting Depths Kuparuk River Field Pad 1 H CMN :OMM1 4ES EI 3R EN, 3R Elifi E 3EOL A5T f_o ASSI 'T TECH S'TAT TECH AA19d./3 This letter is to request Administrative Approval to vary from the existing Kuparuk River Field Rules, Conservation Order No. 173, to permit surface casing to be set as deep as 4,100' TVD in development wells on pad 1 H, which is an existing peripheral Kuparuk development pad. In previous discussions with you and your staff, which resulted in the establishment of Conservation Orders No. 203 and No. 209, ARCO Alaska Inc. established a standard operating procedure of setting surface casing at least 200' TVD below the base of the West Sak sands. In reviewing our geological structure maps, it is estimated that for the 1 H Pad, the base of the West Sak will occur at a maximum depth of 3,900' TVD. A surface casing depth of 4,100' TVD would ensure that the multiple, discontinuous hydrocarbon -bearing sands occurring sporadically below the West Sak would be isolated by the surface casing cement. A copy of ARCO's present Unit Development Status Map showing the location of the 1 H pad with respect to the existing development of the CPF-1, CPF-2, and CPF-3 areas is attached. Specific reasons for requesting a deeper surface casing setting depth are: It is preferential to set the surface casing at least 200' TVD below the base of the West Sak sands. These West Sak sands can be better isolated with surface casing than the old practice of attempting to isolate the sands with cement from the production casing. From a general review of Kuparuk well data, it has been observed that at least 200' TVD below the base of the West Sak sands will adequately provide that the surface casing is set below any small oil stringers that are sometimes found below the West Sak formation. A better formation integrity test will be obtained prior to drilling into the Kuparuk sands. Although past formation integrity test data has been acceptable, drilling through the Kuparuk interval will be safer with higher surface casing shoe integrity RECEIVED ,I) S E P 10 1992 Alaska Oil & Gas Cons. Commission Anchorage Ms. L. Ain • September 9, 1992 Page 2 3. The West Sak hydrocarbon zones can be safely drilled using a flow diverter system on the conductor casing. On previous Kuparuk development wells, the West Sak was drilled safely with a drilling fluid density of 9.0 ppg. The West Sak reservoir pressure is approximately 8.6 ppg equivalent, with no known gas/oil contact and a low solution GOR. 4. Information and experience gathered from previously drilled pads in the Kuparuk River Field where the surface casing was set deeper than the established field rules indicates that the West Sak formation can be safely penetrated using a conductor/diverter system. Thank you for your consideration of this request. ARCO can furnish any further information you may need. Contact Dan Stoltz at 263-4208 if anything else is necessary. Sincerely, R. F. Morgan Regional Drilling Engineer RFM/MLP/mac Attachment cc: A. W. McBride 1 H Pad General Wellfile RECEIVED s E P 10 1992 Alaska Oil & Gas Cons. Commission Anchorage KUARUK RIVER U%IT 1 H LOCATION MAP RECEIVED s E P 10 1992 Alaska Oil & Gas Cons. Commission Anchorage ARCO Alaska. !F • Post Offic - pox 100360 Anchorage. Alaska 99510-0360 Telephone 907 276 1215 May 15, 1990 Mr. C. V. Chatterton Commissioner State of Alaska Alaska Oil & Gas Conservation Commission 3001 Porcupine Drive Anchorage, Alaska 99501 Dear Mr. Chatterton: SUBJECT: Revised Surface Casing Setting Depths Kuparuk River Field Pad 3G jA rO � b This letter is to request Administrative Approval to vary from the existing Kuparuk River Field Rules, Conservation Order No. 173, to permit surface casing to be set deeper than 2,700' TVD in development wells on pad 3G, which is a peripheral Kuparuk development pad. In previous discussions with you and your staff, which resulted in the establishment of Conservation Orders No. 203 and No. 209, ARCO Alaska Inc. established a standard operating procedure of setting surface casing at least 200' TVD below the base of the West Sak sands. In reviewing our geological structure maps, it is estimated that for the 3G Pad, the base of the West Sak will occur at a maximum depth of 2,870' TVD. A surface casing depth of 3,500' would ensure that the multiple, discontinuous hydrocarbon -bearing sands occurring sporadically below the West Sak would be isolated by the surface casing cement. A copy of ARCO's present Unit Development Status Map showing the location of the 3G pad with respect to the existing development of the CPF-1, CPF-2, and CPF-3 areas. Specific reasons for requesting a deeper surface casing setting depth are: It is preferential to set the surface casing at least 200' TVD below the base of the West Sak sands. These West Sak sands can be better isolated with surface casing than the old practice of attempting to isolate the sands with cement from the production casing. From a general review of Kuparuk well data, it has been observed that at least 200' TVD below the base of the West Sak sands will adequately provide that the surface casing is set below any small oil stringers that are sometimes found below the West Sak formation. 2. A better formation integrity test will be obtained prior to drilling into the Kuparuk sands. Although past formation integrity test data has been acceptable, drilling through the Kuparuk interval will be safer with higher surface casing shoe integrity. RECEIVED, MAY 161990 Alaska Djl,& Gas Cons. Commi$8101 Silchoragal ARCO Alasxa. inc. is a Sulas;c-ary of Atlantic R ichtieldCompany AR39-500"'-�' Mr. C. V. Chatterton May 15, 1990 Page 2 3. The West Sak hydrocarbon zones can be safely drilled using a flow diverter system on the conductor casing. On previous Kuparuk development wells, the West Sak was drilled safely with a drilling fluid density of 9.0 ppg. The West Sak reservoir pressure is approximately 8.6 ppg equivalent, with no known gas/oil contact and a low solution GOR. 4. Information and experience gathered from previously drilled pads in the Kuparuk River Field where the surface casing was set deeper than the established field rules indicates that the West Sak formation can be safely penetrated using a conductor/diverter system. Thank you for your consideration of this request. ARCO can furnish any further information you may need. Contact Mark Prestridge at 265-6952 if anything else is necessary. Sincerely, J. B. Kewin Regional Drilling Engineer JBK/MLP/mac Attachment cc: P. J. Archey 3G Pad General Wellfile RECEIVE MAY 161990 A, laska Oil & Gas cons. Commissio11 +�., Anchoraga. KUPARUK RIVER UN' • DRILL SITE LOCAT1ONQ KRU BC KPA BC Jfa'v�9 I 0 N ARCO Alaska, Inc. • w Post Office Box 100360 Anchorage, Alaska 99510-0360 Telephone 907 276 1215 j November 9, 1988 Mr. C. V. Chatterton Commissioner . State of Alaska C6 (`75 -�^�-� Alaska Oil & Gas Conservation Commission Ck 3001 Porcupine Drive Anchorage, AK 99501 ( 93 7�,adS Subject: Revised Surface Casing Setting Depths Kuparuk River Field 20,6 7 fcc6� Dear Mr. Chatterton: v 2©9 l5" �om�S This letter is to request Administrative Approval to vary from the existing Kuparuk River Field Rules, Conservation Order No. 173, to permit surface casing to be set below 2700' from ground level in 3 exploratory wells within the Kuparuk River Oil Pool. C � The three subject wells and maximum anticipated surface casing setting depths are listed below. Well Name Surface Location Kuparuk 34-11-10 No.1 900'FSL,, 900'FWL, Sec34, T11N, R10E, UM Kuparuk 9-12-10 No.1 1500'FNL, 780'FWL, Sec 9, T12N, R10E, UM Kuparuk 3-11-8 No.1 210'FNL, 6301FEL, Sec 3, T11N, RBE, UM Maximum Setting Depth (TVD) 3400' 3700' 2900' kL or In Kuparuk 34-11-10 No. 1 and Kuparuk 9-12-10 No. 1 the revised setting depths are requested to allow surface casing to be set between the Ugnu and West Sak sands to accommodate coring of the West Sak Sand. It has been shown on previous Kuparuk development wells that the Ugnu can be safely drilled using a flow diverter stack on conductor casing and a drilling fluid density of 9.0 ppg. Our request for a deeper surface casing seat in Kuparuk 3-11-8 No. 1 is made for the following reasons: RECEIVED Alaska Oil & Gas Cons. Commission 1 Anchorages ARCO Alaska, Inc. Is a Subsidiary of AllanticRichfieldCompany Mr. C. V. Chattoon . Commissioner November 9, 1988 Page 2 1. It is preferred to set the surface casing shoe 200' TVD below the West Sak sands. From a general review of Kuparuk well data, we feel that 200' TVD below the base of the West Sak will adequately ensure that casing is set below any small oil stringers sometimes found below the West Sak formation. 2. A better formation integrity test will be obtained prior to drilling into the Kuparuk sands. Although past formation integrity tests have been acceptable, drilling of the Kuparuk interval will be made safer with higher surface casing shoe integrity. 3. We feel that West Sak hydrocarbons can be safely drilled using a flow diverter stack on conductor casing. On previous Kuparuk development wells, the West Sak was safely drilled will a drilling fluid density of 9.0 ppg. The West Sak reservoir pressure is approximately 8.4 ppg equivalent, with no known gas/oil contact and a low solution GOR. If you have any questions on the above, please call Wayne McBride at 263-4962. Sincerely, i B. K in Regional Drilling Engineer JBK/ih Ltr01 11/09/88 cc: A. W. McBride M. B. Winfree Well Files KRU 34-11-10 No. 1 KRU 9-12-10 No. 1 KRU 3-11-8 No. 1 RECEIVED Nov 16 loci Alaska Oil & Gas Cons. Commission Anchorage V 34 35 .36 32 33 34 35 T. /3 N. T. 12 N. 5 2 4 3 ct r� ROPO., 'ED DRILL SIrE, a ACCESS ROAD LOCAr,'ON KUPARL K 9-12-10.- 12 7 9 1/0 12 .000 N D.S. J. C 4 /J.** /8 17 15 4 D. S. PR i,, uhmaw.t. O �24 19 4 2 , JR r, ho I All. 6�25 30� 29. 28 27 25 K Kc S. D'� K.C. P/r D.S. /-Y 2 / 5 D.S. I -A "12 8 D-S.2-Z 14 18 1? Rev. By Date Descrio jj-,. 34 55 56 T. 12 N. K.zc. T. N. I-C ,1,14 O.S.1 C / /0 0 ARCO Alaska, Inc. KUPARUK9-12-10; WELL I 6 WINTER DRILLING 11 6 PERMIT EXH18 I r D,S I-E INN" & DOGNEM 9 PLANP*I;G 0 SLFKWXtS Dr hyY-8. _127,byA.J. R. ISH I of 2 Asti: 9'15'88 1Dwg.NgL,W-W6.01-d25J 16 /5 14 1-5 /8 17 18 17 k D. S. 3.6 CA 20� 21 22 23 24 20 U19 Q: ca ... r19 k . . ..... .. . �ros- J-F 27 26 25 Jol.. 29 30 29 28 J/ 32 35 34 36 31r 32 I-V D.S. 2-L T. 12N. 17 C4 0 21 r11N. PRO�90SED DRILL s1r - I MI. ,32 L 0 1 A rl,E a* ACC SS ROAD ON "�KUPARUF( 3-11.8 Z6 5 4 3 .1 D. 2-r 7 8 91-11 /0 .7 08 P/r m E �- D.S. 2-V 18 16 15 14413 18 17 D.S. 2-A 20 2V 2 23 19 20 24 :DS.2-8 429 50 30 ARCO Alaska, Inc. LIS, 2*M D. S. H 4r 19 20 ,4 4:7. 1.2- % J2 5* 2*" r KUPARUK 3 -11-8 ; WELL I W/NrER DRILLING PE P ERMIr EXH181r Lon 32 33 34 5 LOUNSM & ASSOCIMM INC. ENGI&EM * PLANERS 0 SURVENM Or T. I N. L ?I - [Ck.by.A.J.R. ISAL. 2 A.'NSK6.01-d2l Rev. By Date ARCO Alaska, Inc. Post Office A4100360 Anchorage, Alaska 99510 Telephone 907 276 1215 May 22, 1985 Mr. C. V. Chatterton Commissioner State of Alaska Alaska Oil & Gas Conservation Commission 3001 Porcupine Drive Anchorage, AK 99501-3192 Subject: Revised Surface Casing Setting Depth, 2Z-Pad, Kuparuk River Field Dear Mr. Chatterton: Pursuant to our conversation of May 21, 1985, and in accordance with Conservation Order No. 190, Rule No. 3, we request Admini- strative Approval to deepen the maximum surface casing setting depth on Kuparuk 2Z-Pad to 3450' TVD. Subsequent to the issuance of Conservation Order No. 190 it was deemed advantageous, by mutual agreement, to deepen the surface casing setting depths to 200' TVD below the base of the West Sak Sands to better insure zone isolation of discontinuous hydro- carbons located immediately below the West Sak formation. The subject request to deepen the casing setting depths at 2Z-Pad will allow us to conform with these guidelines. As we anticipate spudding on 2Z-Pad, Well No. 16, on May 29, 1985, your prompt review and handling of this matter will be greatly appreciated. Sincerely, ewin Area Drilling Engineer JBK:pr cc: J. Gruber - ATO 1478 L. S. Truby - ATO 1484 RKC 1\10 MAY 2 2 1985 Gas Cons. Commission Alaska 0t1 & Anchorage 03:JBK:1 ARCO Alaska, Inc. is a Subsidiary of AtlanticRichfield Company ARCO Alaska, Ine Post Officic x 100360 I 1 Anchorage, Alaska 99510 a ® Telephone 907 276 1215 MM ' CP r _ ..1Fw September 23, 1983 i Q _ ,.... '-- .-3 Mr. C. V. Chatterton _I A FA -- Commissioner r'C� ' _,ry State of Alaska Alaska Oil & Gas Conservation j;"'F1, Commission -! ST�TT C 3001 Porcupine Drive -M- srnfi�c Anchorage, AK 99501 1------ -- - -- cONf'fR_. SUBJECT: Revised Surface Casing Depth, FLF Well 1F-16, Kuparuk River Field Dear Mr. Chatterton: We request administrative approval to depart from existing Kuparuk River Field rules to allow surface casing to be set at 3350' TVD on Well No. 1F-16. The reason for the deep surface casing is to allow a cased hole drill stem test of the West Sak Sand, while not affecting the Kuparuk 7" production casing. ARCO Alaska, Inc. feels that this hydrocarbon zone can be safely drilled below the conductor because of the following reasons: 1. We feel that the West Sak Hydrocarbons can be safely drilled using a diverter stack on conductor casing. A 9.5 ppg mud would be utilized to overbalance the West Sak Sand which has a reservoir pressure in this area of approximately 8.7 ppg. 2. A mud weight of 9.1 ppg has been used successfully on the first West Sak Pilot well, which is located four (4) miles southwest of the subject well. In addition, no localized pressure anomalies exist in the West Sak in this area as determined from eleven (11) previous wells drilled off of 1F-pad. 3. Pads 2X, 2Z, and 2C all have wells that had surface casing set safely below the West Sak, in accordance with previous administrative approval received from your office. The estimated spud date for 1F-16 is November 1, 1983. If you have any questions or need additional information, please call me at 263-4970. Sincerely, !l uc`wPsf Sak ��rQSS.cJ�"[p••7u 1 loedfiZ*� prers. a Qti°s in B . win ce 1� , 5� - P ro paced d c& r1 • Area rill i l l i ng Engineer50 3 3ZS'r�, JBK/BL09: sm r?�tfe* 4 1 Co'* /73 JQQJ� not 004,4113 dal. �pyrt�dl isLJr// A erra r+e �► a� Cc�. A►aska O!! & uas D)M C4t17Miss10R -' Anporaue 7��3 ARCO Alaska, Inc. is a Subsidiary of AtlanticRichfieldCompany i ARCO Alaska, Inc. /I � Post Office 13000360 Anchorage, Alaska 99510�� Telephone 907 276 1215 July 12, 1983 Mr. C. V. Chatterton Commissioner State of Alaska Alaska Oil & Gas Conservation Commission 3001 Porcupine Drive Anchorage, AK 99501 SUBJECT: 2X Pad - Surface Casing Setting Depth Kuparuk River Field Dear Mr. Chatterton: RES ENG 1 EN G 3 ENG 4FJ 1 GEdL -- i 3 Gr_ STA_T TEC STAT TEC FILF: Well 2X-1, the first well drilled on the 2X-pad, was drilled in compliance with Rule 4 (c) of Conservation Order 173 of the existing Kuparuk River Field Rules as directed by Conservation Order 190, dated May 16, 1983. This letter will serve to docu- ment our drilling practices utilized and findings to date. The 10-3/4" surface hole was drilled to a casing point of 2662' MD, 2475' TVD with 16" conductor casing and a diverter stack. Open hole logs were run to TD of the 13-1/2" surface hole and no indication of shallow gas was detected from these logs. 10-3/4" 45.5 lb/ft HF-ERW casing was run to bottom and cemented to surface. The 8-1/2" hole was drilled beneath the 10-3/4" casing with a 5000# BOP stack and 9.1 ppg mud to the base of the West Sak sands @ 2918°TVD, 3218'MD, with no localized anomalies (i.e.; gas cap, excessive pressure, etc.) seen through the West Sak. In light of these facts, ARCO Alaska, Inc. would like to request that the remainder of the surface holes drilled on 2X pad be drilled in accordance to the provisions of Conservation Order No. 190. Any significant changes in geological conditions discovered subsequent to this request will be forwarded to your office in writing in a timely fashion. Your review and approval of the remaining drilling permits filed for 2X-pad will be greatly appreciated. Sin ely, J B . e � Area Dri ing Engineer JBK/JG:tw GRU3/L66 cc: G. L. Alvord, ATO 1492 J. Gruber, ATO 1478 J. Trimble, AOGCC P. A. VanDusen, ATO 1476 RECEIVED JUL 151983 Alaska Oil & Gas o Cons.dge Commission Anc ARCO Alaska, Inc. is a Subsidiary of Atlantic Richfield Company ARCO Alaska, Inc. Post Office Bo 00360 Anchorage, Alaska 99510 Telephone 907 276 1215 June 10, 1983 Mr. C. V. Chatterton Commissioner State of Alaska Alaska Oil & Gas Conservation Commission 3001 Porcupine Drive Anchorage, AK 99501 SUBJECT: 2C Pad - Surface Casing Setting Depth Kuparuk River Field Dear Mr. Chatterton: Well 2C-1, the first well drilled on the 2C-pad, was drilled in compliance with Rule 4 (c) of Conservation Order 173 of the existing Kuparuk River Field Rules as directed by Conservation Order 190, dated May 16, 1983. This letter will serve to docu- ment our drilling practices utilized and findings to date. M OMM- - - RE F' 1G, 2 ErvG 4 cNr- f 1 GEOL -T i a GEOL 3 G F0L _ STAT TFC � STA_TTECIN rCc PER: I F!LF: The 12-1/4" surface hole was drilled to a casing point of 2554' MD, 2304' TVD with 16" conductor casing and a diverter stack. Open hole logs were run to TO of the 12-1/4" surface hole and no indication of shallow gas was detected from these logs. 9-5/8" 40"lb/ft HF-ERW casing was run to bottom and cemented to surface. The 8-1/2" hole was drilled beneath the 9-5/8" casing with a 5000# BOP stack and 8.8 ppg mud to the base of the West Sak sands @ 2773 TVD, 3280 MD, with no localized anomalies (i.e., gas cap, excessive pressure, etc.) seen through the West Sak. In light of these facts, ARCO Alaska, Inc. would like to request that the remainder of the surface holes drilled on 2C pad be drilled in accordance to the provisions of Conservation Order No. 190. Any significant changes in geological conditions discovered subsequent to this request will be forwarded to your office in writing in a timely fashion. Your review and approval of the remaining drilling permits filed for 2C-pad will be greatly appreciated. Sincerely, �lcfif�� J. e n rea Or lling Engineer JBK/GLA38:tw cc: G. L. Alvord, ATO 1492 J. Gruber, ATO 1478 J. Trimble, AOGCC P. A. VanDusen, ATO 1476 RECEIVED JUN 141983 ARCO Alaska, Inc. is a Subsidiary of Atlantic Richfield Company Alaska Dil & Gas Cons. Anchorage Commission NOTICE OF PUBLIC HEARING STATE OF ALASKA Alaska Oil and Gas Conservation Commission Re: The application of ARCO ALASKA, INC., dated May 2, 1983, requesting an exception to Rule 4(c) of Conservation Order No. 173 in order to set surface casing deeper on three specific drill pads in the Kuparuk River Field than now allowed. Notice is hereby given that ARCO ALASKA, INC. has requested the Alaska Oil and Gas Conservation Commission, to issue an order granting an exception to Rule 4(c) of Conservation Order No. 173 for .wells-. to be drilled from Pads 2Z, 2X, and 2C in the Kuparuk River "Field. The exception is requested in order to provide a higher *,degree of integrety in isolating the potentially commer- cial hydrocarbon bearing Ugnu and West Sak zones by covering same with cement lifted from the shoe of the surface casing rather than with cement lifted from the shoe of the deeper production string. Parties who may be aggrieved if the order is issued granting the reference exception are allowed 10 days from the date of this publication in which to file a protest, in writing, stating in detail the nature of their aggrievement and their request for a hearing. The place of filing is the Alaska Oil and Gas Conserva- tion Commission, 3001 Porcupine Drive, Anchorage, Alaska 99501. If such a protest is timely filed, a hearing on the matter will be held at the above address at 9:00 AM on May 16, 1983 at which time protestants and others may be heard. If no such protest is timely filed, the Commission will consider the issuance of the order without a hearing. Q V.Chatter onairman Alaska Oil and.Gas Conservation Commission A�V, l�Io• rot 19?� THE ANCHORAGE TI P.O, BOX 40 ANCHORAGE, ALASKA 99510-0040 PROOF OF- PUBLICATION AK OIL/GAS CONSERVATION COMM, 3001 PORCUPIUE: DR. ANCHORAGE, AK 99501 DELLA E, BLACK , BEING DULY SWORN, ACCORDING TO LAW DECLARES: THAT SHE IS THE LEGAL CLERK OF THE ANCHORAGE TIMES, A DAILY NEWSPAPER PUBLISHED IN THE TOWN OF ANCHORAGE:. Ili THE THIRD JUDICIAL DIVISION, STATE OF ALASKA, AND THAT THE NOTICE OF .......................... AO-08 5525 A COPY OF WHICH IS HERETO ATTACHED, WAS PUBLISHED IN ................... 1 ISSUES OF THE: ANCHORAGE TIMES. BEGINNING ON ....................... 05/06/83 ENDING ON .... ...... ..... go ....... go 05/06/83 THE SIZE: OF THIS AD WAS............ 67 LINES SIGNE:D.........e � THE PRICE OF THIS AD IS.* ........... $ 20.10 THE AD NUMBER IS .................... 1529907 SUBSCRIBED AND SWORN TO BEFORE ME: THIS ................... 06 DAY OF MAY,1983 STATE OF ALASKA NOTICE OF PUBLIC HEARING STATE OF ALASKA Alaska Oil and Gas Conservation Commission Re: The application of ARCO ALASKA, INC., dated May 2, 1983, requesting an exception to Rule 4(c) of Conservation Order No. 173 in order to set surface casing deeper on three specific drill pads in the Kuparuk River Field than now allowed. Notice Is hereby given that A RCO ALASKA, INC. has re- quested the Alaska Oil and Gas Conservation Commission, to issue an order granting on ex- ception to Rule 4(c) of Conser- vation Order No. 173 for wells to be drilled from Pads 2Z, 2X, and 2C In the Kuparuk River Field. The exception is requested in order to provide a higher degree of integrity In isolating the Po- tentially commercial hydrocor. bon bearing Ugnu and West Sok zones by covering same with ce- ment lifted from the shoe of the surface casing rather than with cement lifted from the shoe of the deeper production string. Parties who may be ;ig- grleved if the order is issued granting the reference excep- tion are allowed 10 days from the date of this publication in which to file a protest, in writ- ing, stating in detoll the nature of their aggrlevement and their request for a hearing. The place of filing Is the Alaska Oil and Gas Conservation Commission, 3001 Porcupine Drive, Anchor- age, Alaska 99501. If such a pro- test is timely filed, a hearing on the matter will be held at the above address at 9:00 AM on May 16, 1983 at which time Prot- estants and others may be heard. If no such protest is timely filed, the Commission will consider the Issuance of the order without a hearing. C. V. Chatterton Chairman, Alaska Oil and Gas j Conservation Commission AO-06 5525 Pub: May 6, 1983 I, RECEIVED MAY I o 1983 Alaska Oil &Gas Cons. Commissi0n NOTARY .PUBLIC- OF THE STATE OF ALASKA — Anchorage MY COMMISSION EXPIRES ............... -:5 — /- '9 � ARCO Alaska, Inc. Post Office Box Rbo Anchorage, Alaska 99510 Telephone 907 277 5637 P , flay 2, 1983 Mr. C. V. Chatterton State of Alaska Alaska Oil'& Gas Conservation Commission 3001 Porcupine Drive Anchorage, Alaska 99501 SUBJECT: Revised Surface Casing Setting Depths, 2Z, 2X, and 2C Pads, Kuparuk River Field Dear Mr. Chatterton: This letter is to request Administrative approval to vary from the existing Kuparuk River Field Rules to allow the surface casing to be set as deep as 3250' TVD in development wells on Pads 2Z, 2X, and 2C. The Field Rules currently require that the surface casing be set in a depth interval ranging from 500 measured feet below the base of the permafrost to 2700' TVD. Our request for a deeper surface casing seat is made for the following reasons: 1. It is preferred to set the surface casing shoe just below the West Sak sand. This sand can be better isolated with surface casing, as opposed to the current method of using production casing to isolate the sand. On the subject pads, very little additional drilling below the conductor/diverter will be required to accomplish this. 2. A better formation integrity test will be obtained prior to drilling into the Kuparuk sands. Although past formation integrity tests have been acceptable, drilling of the Kuparuk interval will be made safer with higher surface casing shoe integrity. 3. We feel that West Sak hydrocarbons can be safely drilled using a flow diverter stack on conductor casing. When drilling below the conductor/diverter, a 10.0 ppg fluid is currently used to overbalance potential sand stringers containing free gas just below the permafrost. If the West Sak is drilled below the conductor/diverter as proposed, a 10.0 ppg fluid would therefore be used. On previous Kuparuk development wells, the West Sak was safely drilled (below surface casing) with a drilling fluid density of 9.0 ppg. The West Sak reservoir pressure is approximately 8.4 ppg equivalent, with no known gas/oil contact and a low solution ARCO Alaska, Inc is ., > jh•.idOry 0 Allanlic Richti, IciCompany 9 Alaska Oil & Gas Conservation Commission May 2, 1983 Page 2 GOR. To our knowledge, formation fluid has never naturally surfaced on West Sak production tests, with the exception of West Sak SWPT No. 1 which naturally flowed 20± BPD with an artificially heated wellbore. The Ugnu sands are not hydrocarbon bearing in the subject areas. 4. On 2C and 2X Pads, the Field Rules would require setting surface casing into either the Ugnu Sands, the 100' thick K-13 shale which lies between the base of the Ugnu and the top of the West Sak, or the middle of the West Sak. In all likelihood, surface casing would be set in the Ugnu Sands or West Sak Sand because the K-13 shale is difficult to locate while drilling. It is probable that poor formation integrity tests would result from this practice. As additional safety measures, ARCO proposes that the following procedures be used to ensure that the West Sak Sand is safely drilled below the conductor/diverter: 1. On 2Z Pad, the first two wells (2Z-8 and 2Z-7) will be drilled as currently permitted. Surface casing will be set at approximately 2200' TVD. The West Sak Sand will be drilled below the surface casing with a drilling fluid density of 8.8-9.2 ppg. In summary, these wells will be drilled using our normal procedures. The above has already been successfully done on 2Z-8. If 2Z-7 is also successful, then the remaining wells will be drilled as proposed in this letter, i.e., drilling below the conductor/diverter to just below the West Sak Sand with a 10.0 ppg fluid density and isolating the sand with surface casing. 2. For 2X and 2C Pads, the first well drilled on each pad will be drilled using the same procedures used on 2Z-8 and 2Z-7, above (surface casing depth may vary slightly from 2200' but will be shallower than the West Sak Sand). As is the case with our current drilling procedures, the West Sak Sand will be isolated with cement behind the production casing on the first wells drilled on these pads. After drilling the first well and providing no local anoma- lies are found in the West Sak, all subsequent wells on these pads will be drilled with the revised surface casing depth proposed in this letter. Alaska Oil and Gas Conservation Commission May 2, 1983 Page 3 The surface hole will be logged on 2Z-7 and on the first wells drilled on 2X and 2C Pads. This will be utilized to confirm our geologic "picks" and will enable us to "fine-tune" surface casing depths on subsequent wells. The deepest that surface hole would be drilled is 3250' TVD, 2975' TVD, and 2975' TVD for 2Z, 2X, and 2C Pads, respectively. Attached are tables which give our estimated depths for the pertinent zones on the subject pads. The estimated spud date is May 16-17, 1983, for the first two wells to be drilled with the revised surface casing depth. The wells are 2Z-6 and 2Z-1. Due to the timing of these wells, your prompt attention to this matter will be greatly appreciated. If you have any questions on the above, please do not hesitate to call either myself at 263-4960 or Jim Onisko at 263-4943. Sincerely, Vq N DNS/fN P. A. VanDusen J District Drilling Engineer s2 PAV:JEO14:sm Attachments k,4AY 0 3 1�?)3 Alas'i6a Gas Gas Cans. Ccmrnis.Juri Anchorage Base of Permafrost Top of Ugnu Sands Top of West Sak K-12 Proposed Surface Hole Depth s.� CID C/3 Q -. c e� JE014a:smi TABLE 1 2Z PAD ESTIMATED DEPTHS (TVD) 2Z-1 2Z-2 2Z-3 2Z-4 2Z-5 2Z-6 2Z-7 2Z-8 1409' 1409' 1409' 1409' 1406' 1406' 1406' 1406' 2149' 2139' 2129' 2149' 2186' 2166' 2176' 2166'0 2834' 2809' 2819' 2859' 2881' 2836' 2856' 2831' 3094' 3069' 3079' 3119' 3141' 3096' 3116' 3091' 3200' 3175' 3200' 3225' 3250' 3200' 3225' 3200' 0 Base of Permafrost Top of Ugnu Sands Top of West Sak K-12 Proposed Surface Hole Depth JE014b:sm TABLE 2 2X PAD ESTIMATED DEPTHS (TAD') 2X-1 2X-2 2X-3 2X-4 2X-5 2X-6 2X-7 2X-8 1538' 1538' 1538' 1538' 1538' 1538' 1538' 1538' 1903' 1893' 1903' 1893' 1873' 1863' 1873' 188310 2593' 2583' 2583' 2553' 2543' 2523' 2543' 2553' 2853' 2843' 2843' 2813' 2803' 2783' 2803' 2813' 2975' 295G' 2950' 2925' 2925' 2SOG' 2925' 2925' Base of Permafrost Top of Ugnu Sands Top of West Sak K-12 Proposed Surface Hole Depth o i3 fXb JE014c:sm TABLE 3 2C PAD ESTIMATED DEPTHS (TUD) 2C-1 2C-2 2C-3 2C-4 2C-5 2C-6 2C-7 2C-8 1468' 1468' 1468' 1468' 1468' 1468' 1468' 1468' 1918' 1928' 1928' 1928' 1948' 1933' 1948' 193810 2498' 2518' 2518' 2528' 2588' 2568' 2578' 2558' 2768' 2788' 2788' 2798' 2858' 2838' 2848' 2828' 2875' 2900' 2900' 2900' 2975' 2950' 2950' 2950' 0
