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Home My WebLink AboutCO 229Conservation 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. n 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: ,~-~""~'~)~V1AR IA DATE: ~'.~,~ _~ Scanning Preparation TOTAL PAGES BY; DATE: Production Scanning Stage 1 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 (SCANNING IS COMP~AT THIS POINT UNLESS SPECIAL ATTENTION IS REQUIRED ON AN INDIVIDUAL PAGE BASIS DUE TO QUALFrY, 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 two drill ) pads in the Kuparuk River ) Field. ) Conservation Order No. 229 Kuparuk River Field Kuparuk River Oil Pool April 28, 1987 IT APPEARING THAT: , ARCO Alaska, Inc., by letter dated April 1, 1987, 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 be set as deep as 3700 feet true vertical depth in development wells on Kuparuk River Unit drilling pads 2M and 3H. · Notice of public hearing was published in the Anchorage Times on April 12, 1987. 3. There were no protests filed to the application. 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 hydrocarbon-bearing in the area of drilling pads 2M and 3H. · The oil in the West Sak sands has a low solution GOR, and has no known gas-oil contact. · In the area of the two 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. Conservation Order No. 229 April 28, 1987 Page 2 , · · The West Sak Reservoir has been 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 two 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 No. 190, 193, 203, and 206 granted an exception to Rule 4(c) of Conservation Order No. 173 for wells to be drilled on 33 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 with a conductor/ diverter system and a minimum 9.0 pounds per gallon drilling fluid. CONCLUSIONS: · · 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 two drill pads. Development wells to be drilled to the Kuparuk River Oil Pool on the referenced two pads can be safely drilled to 3700 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 Reservoir will be better protected from damage if it is cemented behind the surface casing. NOW, THEREFORE, IT IS ORDERED THAT: Kuparuk River Unit development wells to be drilled to the Kuparuk River Oil Pool on drilling pads 2M and 3H may be drilled to a maximum 3700 feet true vertical depth before surface casing is set provided that conductor and surface casing are set and cemented in accordance with Conservation Order No. 173, a diverter system is used in accordance with 20 AAC 25.035(b)(1), and a drilling fluid of at least 9.0 pounds per gallon is used in the drilling. Conservation Order No. 229 April 28, 1987 Page 3 DONE at Anchorage, Alaska, and dated April 28, 1987. Chatt ~n Alaska Oil and Gas ~onservation Commission W. W. Barnwell, Commissioner Alaska Oil and Gas Conservation Commission F STATE OF ALASKA ADVERTISING ORDER A0- ADVERTISING ORDER NO. 08-5587 Anchorage Daily Nmos P. O. Box 149001 Anchorage, Alaska 99514-9001 Alaska Oil & Gas Cc~servation Co~nission 3001 Porcuph%e Drive Anchorage, Alaska 99501 AGENCY CONTACT PHONE (907) 279-1433 DATE OF A.O. April 10, 1987 DATES ADVERTISEMENT REQUIRED: April 12, 1987 SPECIAL INSTRUCTIONS: AFFIDAVIT OF PUBLICATION UNITED STATES OF AMERICA STATE OF ~¢?~ ~-~//J DIVISION. SS BEFORE ME, THE UNDERSIGNED, A NOTARY PUBLIC THIS DAY PERSONALLY APPEARED ,/~~ WHO, BEING FIRST DULY SWORN, ACCORDING TO LAW, SAYS THAT HE/SHE IS THE ~~)~-~J~ OF~~/ PUBLISHED AT IN SAID DIVISION ~--~/---~' AND STATE OF ~ ANDTHATTHE ADVERTISEMENT, OF WHICH THE ANNEXED IS A TRUE COPY, WAS PUBLISHED IN SAID PUBLICATION ON THE ,/.¢~t--~ DAY OF ~ 19 ~r~, AND THEREAFTER FOR -/ CONSECUTIVE DAYS, THE LAST PUBLICATION APPEARING ON THE / RATE CHARGED THEREON IS NOT IN EXCESS OF THE RATE CHAI~Pa~D PRIVATE INDIVIDUALS. SUBSCRIBED AND SWORN TO BEFORE ME THIS ~q, DAY OF ~'~-~'~-~--~.- 19~,~ NOTARY PUBLIC FOR STAT"~ OF '--" MY COMMISSION EXPIRES REMINDER INVOICE MUST BE IN TRIPLICATE AND MUST REFERENCE THE ADVERTISING ORDER NUMBER. A CERTIFIED COPY OF THIS AFFIDAVIT OF PUBLICATION MUST BE SUBMITTED WITH THE INVOICE. Notice of Public, Hearing ATTA[ . s~,~,.:.A~s._~_',,, ...... CATION H ERE. / ~ll~ltll Oil and . conurbation Corn mini.on ~ Alaska,;. Inc.' 'dated April' ; r~uestl~g.~ eXcePtion' to rule 4(c) ~' C.~O, 1.73'. In orde~ to ' su~ace '{~;i~9 d~per' 0n 2' ¢lflc"drl'll ,' a=s' In the ' R ' 'p T Kuparuk (.: ',eh Inc. has ,re-/ ,,, , , ,,,,, , ~ ,', , N'~'{'I~e: ,i:~'.'.':~areby olVen~ 'A.EGO:~.:~la~ka,. Inc. has 9~ted,,t~e'. Alaska.011 and Gas c'o~se~va~an Commlssion~ to [~s~e~ an'6¢der gra~fi~g excep- tion' m:.~le: 4(c) ~n conserva- fioh.."ordj~ ~'173 for Wells to' be d~.[I.led. ~, ~ds 2~ and 3H In tb~i'"'K:O~'~Rlver Field. The ~xcepflon ~ ~quested in o~der" o~.~p¢ov.l~e i' ~lgher degr~ In~egrlfY.l~'~ I~laflng the paten-. 'tl~l'ly .c0mmirClal hydr~arbon bearing '...Ugnu and West..' Sak Za ~es wlffi.: surface casing as o~ ~e~ ?"pr~Ucflon casing.. ~*, ~ r-.;'~o ':m'y~e ~'~med · If,ti i~ ~. requisted oraer is issaed, ~a ~'flie i':WHff~nProteSt'prior . fo 1, (I127;~J97 With fha m:.i~ J lon/.3~l, porcoplne ~ncl 0ra~e;,' Alaaka~ ~1'. and '~eq'u mt~a .hearing ~0n' this mat- ter; If. fha p~etest Is:.filea timely a~. rai=es' a :, Subtfanflal mat~ rial...luue.. Crucial to ~]111~(I defer~lnafle~/ aeirt~l .e~ 'fha roamer WllI ~ela'at"ffie ': a~ve 'adareu at ~=~ AM. an May 1.1, conforma"n'c,: Wl,h 20 'AAC ha!d/": :i,te~eSted pa~les, may C°mmlsSl~ner's office, (~07), 279,.l~.affe.r April 27, 1987. If, " I~iuaKe ~'f the order '"' ", :" . ,:~':i,', ' i Alaska Oil & Gas Con~rvaflon J , C°~m!ssl°n' ,,,'. PUb: ApHI.~2, ~987" ~o:~,~,, .... .~. , 02-901 (Rev. 6-85) PUBLISHER Notice of Public Hearing STATE OF ALASKA Alaska Oil and Gas Conservation Commission Re: The application of ARCO Alaska, Inc. dated April 1, 1987 requesting exception to rule 4(c) of C.O. 173 in order to set surface casing deeper on 2 specific drill pads in the Kuparuk River Field. Notice is hereby given that ARCO Alaska, Inc. has requested the Alaska Oil and Gas Conservation Commission, to issue an order granting exception to Rule 4(c) in Conservation Order 173 for wells to be drilled from pads 2M and 3H in the Kuparuk River Field. The exception is requested in order to provide a higher degree of integrity in isolating the potentially commercial hydrocarbon bearing Ugnu and West Sak zones with surface casing as opposed to production casing. A person, who may be harmed if the requested order is issued, may file a written protest prior to April 27, 1987, with the Alaska Oil and Gas Conservation Commission, 3001 Porcupine Drive, Anchorage, Alaska 99501 and request a hearing on the matter. If the protest is filed timely and raises a substantial and material issue crucial to the Commission's determination, a hearing on the matter will be held at the above address at 9:00 AM, on May 11, 1987 in conformance with 20 AAC 25.540. If a hearing is to be held, interested parties may confirm this by calling the Commission's office, (907) 279'1433, after April 27, 1987. If no proper protest is filed, the Commission will consider "'the issuance o£ the order without a hearing. C. V. ~C~~a~ t~on Chair~ Alask~ ~Dt~ & ~ Conservation Commission Published April 12, 1987 ARCO Alaska, Inc. ?J Post Office~,~ 100360 Anchorage, Alaska 99510-0360 Telephone 907 276 1215 April 1, 1987 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 pads 2M, and 3H which are peripheral Kuparuk development pads. 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 pads in question the base of the West Sak will occur at a maximum depth of 3500' TVD. A depth of 3700' TVD would ensure that the multiple, discontinuous..., hydrocarbon-bearing sands occurring sporadically below theWest Sak would be optimumly 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, CPF-2 and CPF-3 areas. I've also included a copy of our most recent Five Year Plan development schedule to reference the subject pads. As stated in previous correspondence, our request for a deeper surface casing seat is made for the following rea- sons: · 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 production casing to isolate the sands. From a general review of Kuparuk well data, we feel~ ARCO A~aska, Inc. is a Subsidiary of AtlanticRichfieldCompany Mr. C. V. Cha{' rton { March 30, 1987 Page 2 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. 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 call Mike Winfree at 263-4603. Sincerely, ZRggignal Drilling Engineer JBK/JFB/ih LtrO1 3/30/87 Attachments Figure 2 ( -' Kuparuk River U~ Waterflood Status 3-R 3-M , .2-N 2-L 2-K 2-J ,.,® ® 3-0 , ,0' o ** ~-[* **:~'':~'*~' ~ '~ ~ o oo o~ ~ ~ · ~ · eeo e'e ~o eo e · · e ·® e' ~ e~ *X e 3-L UJ LLI 0 0 0 0