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Home My WebLink AboutCO 209Conservation 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 Idone) 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) [] Logs of various kinds [] Other BY: ROBIN ~ Scanning Preparation TOTAL PAGES BY: ROBIN A~ Production Scanning Stage I PAGE COUNT FROM SCANNED DOCUMENT: PAGE COUNT MATCHES NUMBER IN SCANNING PREPARATION: /~YES NO Stage 2 IF NO IN STAGE 1, PAGE(S) DISCREPANCIES WERE FOUND: ~ YES NO (SCANNING IS COMPLETE AT THIS POINT UNLESS SPECIAL ATTENTION IS REQUIRED ON AN INDIVIDUAL PAGE BASIS DUE TO QUALrFY, 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 99501-3192 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 15 drill ) pads in the Kuparuk River ) Field. ) Conservation Order No. 209 Kuparuk River Field Kuparuk River Oil Pool May 23, 1985 IT APPEARING THAT: I · ARCO Alaska, Inc., by letter dated April 30, 1985, requested the Alaska Oil and Gas Conservation Commis- sion to issue an order granting an exception to Rule 4(c) of Conservation Order No. 173 to allow surface casing to be set as deep as 4150 feet true vertical depth in development wells to be drilled from drilling pads IR, 2A, 2H, 2T, 3A, 3B, 3C, 3F, 3I, 3J, 3K, 3M, 3N, 30 and 3Q. · Notice of public hearing was published in the Anchorage Times on May 7, 1985. · There were no protests to the request set forth in the notice of public hearing. FINDINGS: · The Ugnu sands and the West Sak sands are hydrocarbon- bearing and potential reservoirs in some areas of the Kuparuk River Field. · The West Sak sands are or could be hydrocarbon-bearing in the area of drilling pads IR, 2A, 2H, 2T, 3A, 3B, 3C, 3F, 31, 3J, 3K, 3M, 3N, 30 and 3Q. · The oil in the West Sak and Ugnu sands has a low solution GOR and has no known gas-oil contact. Conservation Or~ Page 2 May 23, 1985 No. 209 · In the area of the 15 referenced drilling pads, the West Sak sands occur below the maximum surface casing setting depth of 2700 feet true vertical depth set forth in Rule 4(c) of Conservation Order No. 173. · The West Sak and Ugnu sands are currently being investigated in the West Sak Sands Section 35 Project to determine the feasibility and method of reservoir-wide exploitation. ~ The West Sak sands will be better protected in the area of the 15 referenced 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 Orders Nos. 190, 193, 203 and 206 granted exceptions to Rule 4(c) of Conservation Order No. 173 for wells to be drilled on 26 drilling pads and the information and experience gained from setting the surface casing deeper than 2700 feet true vertical depth indicates that the West Sak Reservoir can be drilled safely to 4150 feet true vertical depth with a conductor/diverter system and a minimum 9.0 pounds per gallon drilling fluid. CONCLUSIONS: i A surface casing setting depth deeper than that set forth in Rule 4(c) of Conservation Order No. 173 is safe and will protect the permafrost in the area of the 15 drill pads. · Development wells to be drilled to the Kuparuk River Oil Pool on the 15 referenced pads can'be safely drilled to 4150 feet true vertical depth using a conductor casing, a diverter system and no less than 9.0 pounds per gallon drilling fluid. · The West Sak and Ugnu sands will be better protected from damage if they are cemented behind the surface casing. Conservation Ordi'~ No. 209 Page 3 May 23, 1985 NOW, THEREFORE, IT IS ORDERED: Development wells to be drilled to the Kuparuk River Oil Pool on drilling pads IR, 2A, 2H, 2T, 3A, 3B, 3C, 3F, 31, 3J, 3K, 3M, 3N, 30 and 3Q may be drilled to a maximum 4150 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 May 23, 1985 C. . terton 70hafrman Alaska Oil and Gas Conservation Commission Harry W. ~ugler, C~sioner Alaska Oil and Gas Conservation Commission Alaska Oil and Gas ConservatiOn Commission PR(]OF OB' PObblCI.~TION THE; ~rqCHOF~GE l'Ii, S 99510-0040 ALASKA OIL ~ GAS COIqS~:iRVA[IDro 3001 PL3RCUPJt~g OR,. AI~tCHONAGS, AK 99501 VAbER]E MAb~'I'I~ , 0EiNG bUb¥ St~fORN, ACCORDIi~G IO LAW D~CLARES: T~iAT SH~ IS THE; LEGAL CLERK PUBLISHED IN 'I~E YtJ~ OF ANCHLIRAG~; OTAT~ OF ALASKA, AND 1flAT 'fHh; ~OTICE BF.......................... A COPY OF NIqlCM I8 HERETO AT'.fACHEO, WAS PUBBISHED Ir4,.,.,,,,..,,,,,..,, 0~' THE AmCHf,')RAG~ ENi)IbtG ON,,,..,,,.,,,.,,,,,.,,,.,., AO'08 55,46 1 ISSOES O51O7185 05/07185 76 h I ~! E, 8 PUBLIC HEAR,IN (.~'l~ig~-rou n~ eqOlnmem ~)ecks, Walls, Addition., -. - -%obcat, bock hoe, dural A,os~o ~rvlces ~3~/hour '. - g. ~)ralnogeSystems .~e :.~ '~n~e rFoundaflon Waterproof ~prml ,~v,& RePair · : ¢onservo . a*odee..,, ALOHA N-flce is her-~ ,:left lizln~, weedln~ No~ 173 for develc BI RD FEEDER! 2T, 3A, 3B, 3C/3~11 .cedar, handtraffed River ,Field. The~l~y af,Al~ka ~allbox face,casin~ belo~uffman Business' Pail ptotecfed and 'is' , , , ~ ~ ...... ~ a~,~eed A Be~er ......... 'rill ,,,, ~,' . ~,tlzn~, limin~;,roR ' ""P~r' es Who~eekly'lawn mowing& '~he"~f~n~a' rj~nce. FOr free eSflmafe ~ . /n0~uKe of f~elr ¢ ;' ' ~4~20~ ~e ~lac~. f'~l[ 'Diversified 'EarthWo~ '.~ ssmn,~ ~o..... 937.9a~, ..:.:' L~'~?L~j~, k=nsco~ln9 & H~'drose u/~/11~ uuuv~ uukl~elI ,~,i,~l ., /lle~, the .Com~ wlfhouf o heorln~ Defh=fching '.'. :. A're=flng ' I ,,H~rryW. Kuglef ~ : Trimming. 'Ferflllzlng ~ Pob': ~=y7, 198~. ' Liming. ~ ' ' PH Tesf~g '.~ ~: .'' , . .... ,, .......... .............. TH.E PR,I£ ..... OF TH.IS AD I8,.,....,...,, $ 22.80 THE t~O ~:Ot~BE~ :tS..,...,,..,........, 203834.4 TO BEF'ORE: kig T~i..iS,.....,.,..e,,·..,. 07 DAY £IF' ~Y,1985 RECEIVED MAY 1 o 1985 Oil & Gas Cons. Commission Anchorage NC)TAR'I Notice of Public Hearing STATE OF ALASKA Alaska Oil and Gas Conservation Commission Re: The application of ARCO ALASKA, INC., dated April 30, 1985 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 IR, 2A, 2H, 2T, 3A, 3B, 3C, 3F, 31, 3J, 3K, 3M, 3N, 30 and 3Q. 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 IR, 2A, 2H, 2T, 3A, 3B, 3C, 3F, 31, 3J, 3K, 3M, 3N, 30 and 3Q 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 written protest stating in detail the nature of their aggrievement and their request for a hearing. The place of filing is the Alaska Oil and Gas Conservation 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 May 21, 1985 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. ,arry W. Kugler / Commi s s ioner Alaska Oil & Gas Conservation Commission ARCO Alaska, Inc. ~ Post Office Bo× J00360 Anchorage, Alaska 99510 Telephone 907 276 12'~5 April 30, 1985 Mr. C. V. Chatterton Commi ss ioner 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 4150' TVD in development wells on pads, 1R, 2A, 2H, 2T, 3A, 3B, 3C, 3F, 3I, 3J, 3K, 3M, 3N, 30, and 3Q which will cover the remainder of the core development pads for Kuparuk. Pursuant to several previous discussions with you and your staff, which resulted in the establishment of Conservation Order No. 203, 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 pads in question the base of the West Sak will occur at a maximum depth of 3950' TVD. A depth of 4150' TVD would ensure that the multiple, diScontinuous hydrocarbon-bearing sands occurring sporadically below the West Sak would be optimum- ly isolated by the surface casing cement job. To better orient you to the subject pads, I've included a copy of our present Unit Development Status Map showing the location of these pads with respect to the existing development of our CPF-1 and CPF-2 areas. As stated in previous correspondence, our request for a deeper surface casing seat is made for the following reasons: RECEIVED APR 3 0 198§ · e 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. A better formation integrity test will be obtained prior to drilling into the Kuparuk sands. Although past formation Alaska 0ii & Gas Cons. Commission ARCO Alaska, Inc. is a Subsidiary of AtlanticRichfieldCompany Anchorage 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 previ- ous 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 approximate- ly 8.4 ppg equivalent, with no known gal/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. Sincerely, JBK/ih LIO Attachments KUPARUK RIVER UNIT~" FIVE YEAR. PLAN REPOR~ 3. STATUS OVERVIEW OLIKTOK POINT t % t..~ 3A LJ 2T ! I I I 2A 2U · 2M ,r'i ,,. · / ~2H · t I ~2L ~ a2K I,,J 2X 1Y 2Z 2G ~ , I I t '2J ... lB 2V CPF 2F ~ ~21 2D 2E 1L 2C 1E 1K~ I I I · Figure 1 'unit Development Status Map C. ;ion