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Home My WebLink AboutCO 203 i i' Conservation Order Cover Page XHVZE This page is required for administrative purposes in managing the scanning process. It marks the extent of scanning and identifies certain actions that have been taken. Please insure that it retains it's current location in this file. ~]~¢_~_ Conservation Order Category Identifier Organizing RESCAN [] Color items: [] Grayscale items: [] Poor Quality Originals: [] Other: NOTES: DIGITAL DATA [] Diskettes, No. [] Other, No/Type OVERSIZED (Scannable with large plotter/scanner) [] Maps: [] Other items OVERSIZED (Not suitable for plotter/scanner, may work with 'log' scanner) r-] Logs of various kinds [] Other BY; ROBIN Scanning Preparation TOTAL PAGES BY: ROBIN O Production Scanning Stage I PAGE COUNT FROM SCANNED DOCUMENT: / ~ · PAGE COUNT MATCHES NUMBER IN SCANNING PREPARATION: ../~YES NO BY; Stage 2 IF NO IN STAGE 1, PAGE(S) DISCREPANCIES WERE FOUND: ~ YES NO (SCANNING IS COMPLET~"J[~'~IS POINT UNLESS SPECIAL A'I'rENTION IS REQUIRED ON AN INDIVIDUAL PAGE BASIS DUE TO QUALITY, GRAYSCALE OR COLOR IMAGES) General Notes or Comments about this Document: 5/21/03 ConservOrdCvrPg.wpd STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION 3001 Porcupine Drive Anchorage, Alaska 99501 Re: THE APPLICATION OF ARCO ) ALASKA, INC. for an order ) granting an exceptiOn to ) Rule 4(c) of Conservation ) Order No. 173 for wells to ) be drilled from eight drill ) pads in the Kuparuk River ) Field. ) Conservation Order No. 203 Kuparuk River Field Kuparuk River Oil Pool September 12, 1984 IT APPEARING THAT: 1. ARCO Alaska, Inc., by letter dated August 21, 1984, requested the Alaska Oil and Gas Conservation Commission to issue an order granting an exception to Rule 4(c) of Conservation Order No. 173 to allow surface casing to bet set as deep as 3800 feet true vertical depth in development wells on drilling pads 1L, lQ, IR, 2E, 2U, 2W, 3B, and 3C. 2. Notice of public hearing was published in the Anchorage Times on August 31, 1984. 3. There were no protests filed 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 drilling pads IL, lQ, 1R, 2E, 2U, 2W, 3B, and 3C. 3. The oil in the West Sak sands has a low solution GOR and has no known gas-oil contact. 4. In the area of the eight referenced drilling pads, the West Sak sands are structurally located so as to be at or below the maximum surface casing setting depth of 2700 feet true vertical depth prescribed in Rule 4(c) of Conservation Order No. 173. 5. The West Sak Reservoir is currently being investigated in the West Sak Sands Section 35 Project to determine the feasibility and method of reservoir-wide exploitation. 6. The West Sak sands will be better protected in the area of the eight drilling pads if they are cemented above the shoe of the surface casing rather than several thousand feet above the shoe of the production casing in the Kuparuk River Oil Pool wells that are to be drilled on the pads. Conservation Ordi'~ No. 203 Page 2 September 12, 1984 7. Conservation Orders No. 190 and 193 granted an exception to Rule 4(c) of Conservation Order No. 173 for wells to be drilled on 10 drilling pads and the information and experi- ence gained from setting the surface casing deeper than 2700 feet true vertical depth indicates that the West Sak reservoir can be drilled safely with a conductor/diverter system and a minimum 9.0 pounds per gallon drilling fluid. CONCLUSIONS: 1. A surface casing string setting depth deeper than prescribed by Rule 4(c) of Conservation Order No. 173 is safe and will protect the permafrost in the area of the eight drill pads. 2. Development wells to be drilled to the Kuparuk River Oil Pool on the referenced eight pads can be safely drilled to 3800 feet true vertical depth using a conductor casing, a diverter system and no less than 9.0 pounds per gallon drilling fluid. 3. The West Sak Reservoir will be better protected from damage if it is cemented behind the surface casing. NOW THEREFORE, IT IS ORDERS: Development wells to be drilled to the Kuparuk River Oil Pool on drilling pads 1L, lQ, IR, 2E, 2U, 2W, 3B, and 3C may be drilled to a maximum 3800 feet true vertical depth before surface casing is set provided that conductor casing is set and cemented in accord with Conservation Order No. 173, a diverter system is used in accord with 20 AAC 25. 035(b)(1) and a drilling fluid of at least 9.0 pounds per gallon is used in the drilling. DONE at Anchorage, Alaska and dated September 12, 1984. C~. ~Chatt'~t'on ,/Chairman Alaska Oil and Gas Conservation Commission Harry W./Kugler ' ' er Alaska Oil and Gas CoDaervation Commission , , Lonnie C. Smit~, Commissioner Alaska Oil and Gas Conservation Commission T~E Ai,,C~f'JRaGE TI,~ a .... CiF PugLICail['::,~ 9951D-O040 ~K O].L, & GAS COI,~SEFVaTIU!-,~ 3001 PORCUPIN~i !)~IgE Ai~CHORAGE. AK 99501 Si,~ORt4. ACCUROI~,~G TO ba~ DE;CLARES: THAT S~E IS THE i'~E'.G~I., CL~RK OF THE ANCHORAGE PUBL1S~:D Ii'~ THE T~IRO dtJiDICiab OlVI5IO~, NOTICE: OF. ......................... .aa-os 5540 1 IoSt ES 08131,184 08t?1!84 THE SIZ'{!: (iF THiS AD ~AS ........... . 70 [,,,I,N'E$ SIGNED ........ . . 1 ' $ 21.00 ,, NOTICE OF PUBLIC. HEARING ', . ' .. STATE OF ALASKA', Alaska Oil and Gas' . Conservation Commission, Re: The' applicati0nTof ARCO ALASKA, ~ NC, dated ,August 21, 1984, reauesting, an excep- tion t_o R. ule 4(¢) ~f Cons.ervg- Uon uraer No. 173 in oraer To set. Surface casing at a de, per depth fOr ' Wells .drilled frQm pads 1L, lQ, 1R, 2E, 2U; 2W, 38, and 3C. , . · 'Notl~'e 'is' hel;e'l~y given Yhot ,ARCO 'AiaSka~' Inc, has re- quested the .Alaska Olrand Gas ConservatiOn Comm,lsslon . to 'Issue an, order granting 'an ex. ce.p.tlon..to. Ru!e. ,4(.c.)'_.o.f, Cqnser.- va,on .uraer 'Ho, ~.mr opment .Wells m be d'¢ll.lea':,tro'm pads. 1k, lQ, 1.R,.12E;,2U",.2.W,.'313 a_n.d..3C, Jp t,~e: :Ku~'gruk,:, R!ver~ ~e~a~ Tne" .exc.ept on ' IS.' r.~: quested In: oraer, to eemem-sur,. .face'cas ng belo~ ~the .WeSt SaR Sands In .'the:.,area', of '.the'field' . Where .the.'potentla.[ ¥ prod.UC. · tive West Sak Sands.' W0ul.d . better Protectea 'a.nd..,iS. olate9 ,' than. under ' 'cu¥'rem rU'leS, deeper surface casing depth has. already beer~ Proved to be a safe. practice n' severlal:~.wells In the same vicinity,'.....,.. Pa'riles 'who":, may .be''dg, .grieved If the order Is fssue¢ ' granting-the referenced'requeSt are allOWed 10. daYs':frOm 'thi date. of this publicatlonqn whlct to. file a protest, In Wrlting~ stat. lng in detail .'the :nature of. thei~ aggri.evem, ent and thelr,.request for a' hearing. The'pla~e 0.f fl lin{ Is the' Alaska..Ol.I and.Gas Con. servatlon commlsslen, x' 3001 ' PorcuPine ' Drive, 'Anchorage,. '; Alaska 9~501,31.92. If, SUCh a pro~ test Is timely flled~ a hearing on the 'matter will.'be ~held" at/the above address at. 9..:00;" AM',' on September .1'2, 1984:.~at'~'whlch time prot~stants.'and, 'ofh. e'~s.' may be heard. If no Sucr' ~c., hmelv lileo, tile Cart,mission;. will co,m,Uer Ihe ,ssuance al Ihe order w~thou! a hearing. Is/ Harry w; KU~ier/ .:'' ' · Commlssi0ner ~.,.. . AlaSka. Oil.& Gasl COnseri~btiOn. . ,. AO-085540:' '" ' ' pub:. A0gust 31,1984 . ' .,-',- ,.~. ~ .... C~ k, d ' ,, THE iO {~t:.l~iB~';a IS .................. .. 1875843 SUBSCRIBED .... Notice of Public Hearing STATE OF ALASKA Alaska Oil and Gas Conservation Commission Re: The application of ARCO ALASKA, INC., dated August 21, 1984, requesting an exception to Rule 4(c) of Conservation Order No. 173 in order to set surface casing at a deeper depth for wells drilled from pads 1L, lQ, IR, 2E, 2U, 2W, 3B, and 3C. 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 development wells to be drilled from pads 1L, lQ, IR, 2E, 2U, 2W, 3B, and 3C in the Kuparuk River Field. The exception is requested in order to cement surface casing below the West Sak Sands in the area of the field where the potentially productive West Sak Sands would be better protected and isolated than under current rules. A deeper surface casing depth has already been proved to be a safe practice in several wells in the same vicinity. Parties who may be aggrieved if the order is issued granting the referenced request 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 99501-3192. If such a protest is timely filed, a hearing on the matter will be held at the above address at 9:00 AM on September 12, 1984 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. Harry W.. Kugler Commissioner Alaska Oil & Gas Conservation Commission ARCO Alaska, Inc{ Post Office. x 100360 Anchorage, Alaska 99510-0360 Telephone 907 276 1215 February 20, 1990 Mr. C. V. Chatterton Commissioner State of Alaska Alaska Oil & Gas Conservation Commission 3001 Porcupine Drive Anchorage, AK 99501 SUBJECT: Revised Surface Casing Setting Depths Kuparuk River Field Dear Mr. Chatterton: 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 3700' TVD in development wells on pad 1L, which is a peripheral Kuparuk development pad. Pursuant to several previous discussions with you and your staff, which resulted in the establishment of Conservation Order Nos. 203 and 209, ARCO Alaska, Inc., has established a standard operating practice of setting surface casing 200' TVD below the base of the West Sak sands. In reviewing our geological structure maps, we estimate that for the pad in question the base of the West Sak will occur at a maximum depth of 3480' TVD. A depth of 3700' TVD would ensure that the multiple, discontinuous hydrocarbombearing sands occurring sporadically below the West Sak would be optimally isolated by the surface casing cement job. To better orient you to the subject pad, included is a copy of our present Unit Development Status Map showing the location of the pad with respect to the existing development of our CPF-1, CPF-2 and CPF-3 areas. As stated in previous correspondence, our request for a deeper surface casing seat is made for the following reasons: I , It is preferred to set the surface casing shoe 200' TVD below the West Sak sands. These sands can be better isolated with surface casing, as opposed to the past method of using RECEi'VED ARCO Alaska, Inc. is a Subsidiary of AtlanticRichfieldCompany Mr. C. V. Chatterton February 20, 1990 Page 2 production casing to isolate the 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. , 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. . 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 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 Iow solution GOR. , The information and experience gained from setting the surface casing deeper on previous pads indicate that the West Sak reservoir can be drilled safely with a conductor/diverter system. If you have any questions James Trantham at 265-6434. Sincerely, on the above, please call ~Regional Drilling Engineer JBK/JAT/ih cc: P.J. Archey, ATO/1448 KUPARUK RIVER UNIT DRILL SITE LOCATIONS KRU BOUNDARY KPA BOUNDARY 3-H 3-M 2-K JAT 2/~ ARCO Alaska, I''~ Post Offi~:u dox 100360 Anchorage, Alaska 99510 Telephone 907 276 1215 August 21, 1984 Mr. C. V. Chatterton State of Alaska Alaska Oil & Gas Conservation Commission 3001 Porcupine Drive Anchorage, AK 99501 Re: Revised Surface Casing Setting Depths for iL, lQ, iR, 2E, 2U, 2W, 3B, and 3C Pads in the Kuparuk River Field FI[F: Dear Mr. Chatterton: This letter is to request Administrative approval to vary from the existing Kuparuk River Field Rules, Conservation Order No. 173, to allow the surface casing to be set as deep as 3800'TVD in development wells on Pads 1L, IQ, 1R, 2E, 2U, 2W, 3B, and 3C. 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. The deepest horizon for the base of the West Sak sand occurs on' 1R pad at 3600'TVD. The attached table gives our estimated depths for t~he surface caSing shoes on the subject pads. · Our' request for a deeper surface casing seat is made for the following reasons: · It is preferred to set the surface casing shoe 200' TVD 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. 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. ARCO Alaska, Inc. is a Subsidiary of AtlanticRichfieldCompany Mr. C. ~ ]hatterton August 21, 1984 Page 2 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 (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 GOR. 4. The information and experience gained from setting the surface casing deeper than 2700'TVD on previous pads indicate that the West Sak reservoir can be drilled safely with a conductor/diverter system. If you have any questions on the above, please feel free to call me at 263-4970 or Ken Bonzo at 263-4967. Sincerely, Area Drilling Engineer JBK: KLB: j h L01 08/07/84 ESTIMATED SURFACE CASING SETTING DEPTH FOR iL, iQ, iR, 2E, 2U, 2W, 3B, and 3C Pad No. iL lQ 2E 2U 2W 3B 3C Base of the West Sak Subsea 3300' 3200' 3600' 2900' 2700' 2865' 3000' 3490' Proposed Casing Setting Depth Subsea 3500' 3400' 3800' 3100' 2900' 3065' 3200' 3590' KLB:M01 08/07/84