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Home My WebLink AboutCO 208Conservation 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. <~O_(~ Conservation Order Category Identifier Organizing RESCAN Color items: [] Grayscale items: [] Poor Quality Originals: [] Other: NOTES: DIGITAL DATA ri 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 Production Scanning / Stage I PAGE COUNT FROM SCANNED DOCUMENT: ~r~ _~ PAGE COUNT MATCHES NUMBER IN SCANNING PREPARATION: 7z~ YES NO BY: Stage 2 ~ MARIA DATE :~..~.-//~~ 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 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 99501-3192 Re: Request by ARCO ALASKA, INC.) and SOHIO ALASKA PETROLEUM ) COMPANY for amendments to ) Conservation Order No. 165. ) Conservation Order No. 208 Prudhoe Bay Field Prudhoe Oil Pool. January 30, 1985 IT APPEARING THAT: 1. By a letter dated December 28, 1984, ARCO Alaska, Inc. and Sohio Alaska Petroleum Company, operators of the Prudhoe Bay Unit, requested amendments to Rules 6, 9, and 10 of Conservation Order No. 165. 2. Notice of public hearing was published in the Anchorage Times on January 15, 1985. 3. There were no protests to the request. FINDINGS: 1. The Alaska Oil and Gas Conservation Commission has been monitoring the Prudhoe Oil Pool for more than seven and one-half years. 2. The injection of Beaufort Sea water into the Prudhoe Oil Pool started in June, 1984. Many former producing wells have been converted to water injection wells. 3. Methods in addition to those prescribed by Conservation Order No. 165 will provide quality pressure data for purposes of monitoring reservoir performance. 4. The key-well program for obtaining gas-oil contact movement data is no longer necessary since the original goal of the program has been accomplished. 5. Specific areas of high gas movement should be closely monitored and more flexibility in selecting the areas to be monitored is necessary. 6. With the injection of source water into the reservoir, the influx of the aquifer becomes a moot issue and no longer requires monitoring. 7. Flexibility in programs to monitor injected water movement is necessary. Conservation Orde~I' ~o. 208 Page 2 January 30, 1985 NOW, THEREFORE, IT IS ORDERED THAT: Rule 1. Rule 6(c) Conservation Order No. 165 is amended to read: One specific well on each producing pad or drill site shall be designated as a key well. Semi-annual tran- sient pressure surveys or static pressure surveys shall be conducted on each key well and the following wells are currently designated as key wells: Western Operating Area Sohio Alaska Petroleum Company Operator Eastern Operating Area ARCO Alaska, Inc. Operator A-5 1-4 B-2 2-lA C-2 3-11 D-6 4-5 E-1 5-11 F-4 6-4 G-3 7-6 H-8 9-6 J-6 11-2 M-5 12-3 N-7 13-4 Q-3 14-3 R-1 15-12 S-8 16-11 X-7 17-5 Y-2 18-7 Rule 2. Rule 6(d) of Conservation Order No. 165 is amended to read: An annual transient pressure survey or static pressure survey shall be conducted on at least one production or injection well in each governmental section. The surveys required in either (b)or (c) of this rule can be used to fulfill this requirement. Rule 3. Rule 6(e) of Conservation Order No. 165 is amended to read: Data from the surveys required in (a), (b), (c), and (d) of this rule shall be filed with the Commission by the last day of the month following the month in which each survey is taken. Form 10-412, Reservoir Pressure Report, shall be used to report the data from these surveys. Data submitted shall rate, pressure, time, depths, temperature and any well condition necessary for complete analysis of each survey. The datum for the pressure surveys is 8800 feet subsea. Transient pressure surveys obtained by a shut-in buildup test, an injection well pressure fall-off test, a multi-rate test Conservation Ordei lo. 208 Page 3 January 30, 1985 or an interference test are acceptable. Other quantita- tive methods may be administratively approved by the Commission. Rule 4. Rule 9(b) of Conservation Order No. 165 is repealed and reenacted to read: A minimum of 40 repeat cased hole neutron log surveys shall be run annually. Rule 5. Rule 9(e) of Conservation Order No. 165 is repealed. Rule 6. Rule 9(f) of Conservation Order No. 165 is amended to read: By administrative order, the Commission may require additional wells to be logged. Rule 7. Rule 10(a) of Conservation Order No. 165 is repealed and reenacted to read: The operators shall conduct an evaluation program to determine the injected water movement monitoring capability of various cased hole logs. A discussion of progress made in cased hole evaluation techniques shall be included as part of the annual waterflood surveil- lance report submitted to the Commission by the first of August each year. Rule 8. 2. of Conservation Order No. 192 is amended to read: The Alaska Oil and Gas Conservation Commission may administratively approve alternate methods and time periods in the enforcement of Rule 11 of Conservation Order No. 165 provided that the data obtained is appro- priate for monitoring the Prudhoe Oil Pool. DONE at Anchorage, Alaska Oil and Gas Conservation Commission Harry W. Kugler, CommisSioner Alaska Oit~l and Gas C~nservation Commission Lonnie C. Smith¢ L~dmmissioner Alaska Oil and Gas Conservation Commission April 5, 1985 A D M I N I S T R A T I V E A P P R O V A L NO. 208.1 Re: Updating key well designations for reservoir pressure surveillance ARCO Alaska, Inc. P. O. Box 100360 Anchorage, Alaska 995i0 Gentlemen:: Modifications of key well designations have been made by the operators and approved by the Commission. Several of these changes were not included in the designated key well list orig- inally set forth in Conservation Order No. 208. The list for the Western Operation areas is correct as it stands. The current list of key wells for the Eastern Operating Area should be as follows: 1-4 11-2 2-lA 12-3 3-11 13-3 4-5 14-31 5-11 15-13 6-4 16-11 7-2 17-5 9-6 18-7 Sincerely, Harry W f Kugler / Commissioner BY ORDER OF I~{E COMMISSION cc: Sohio Alaska Petroleum Company P.AA 208: lc: HWK/RAD STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION 3001 Porcupine Drive Anchorage, Alaska 99501-3192 Re: THE APPLICATION OF ARCO ) ALASKA, INC. AND STANDARD ) ALASKA PRODUCTION COMPANY ) to revise pressure survey ) rules in Conservation ) Orders 165, 208 and 213 ) Conservation Order No. 220 Prudhoe Oil Pool Prudhoe Bay Field November 3, 1986 IT APPEARING THAT: · Arco Alaska, Inc. and Standard Alaska Production Company requested changes to pressure survey rules in Conservation Orders 165, 208 and 213 by letter dated September 26, 1986. · Notice of an opportunity for public hearing on November 6, 1986 was published in the Anchorage Daily News on October 4, 1986. 3. There was no protest to the proposed changes filed with the Commission. NOW, THEREFORE, IT IS ORDERED THAT Conservation Orders 165, 208 and 213 be amended to read as follows: R~ULE 1. Conservation Order 165, Rule 6a, is amended to read: Prior to regular production, a static bottomhole or transient pressure survey shall be taken on each well. RULE 2. Conservation Order 165, Rule 6b, is amended to read: Within the first twelve (12) months following regular production from a well, a static bottomhole or transient pressure survey shall be taken on the well. RULE 3. .Conservation Order 165, Rule 6e and 6g, are repealed. RULE 4. Conservation Order 208, Rule 1, Rule 2 and Rule 3, are repealed. Conservation Order No. 220 November 3, 1986 Page 2 RULE 5. Conservation Order 213, Rule 1, is amended to read: By administrative approval the Commission may grant time extensions and waive requirements of this order, and by administrative 'order the Commission may require additional pressure surveys in Rule 3 of this order. BE IT FURTHER ORDERED THAT: RULE 6. A minimum of 95 and 87 static bottomhole or transient pressure surveys shall be run annually in the Western Operating Area and Eastern Operating Area, respectiVely. These surveys are needed to effectively monitor reservoir pressure in the Prudhoe 0il Pool. The surveys required in Rules 1 and 2 of this order may be used to fulfill the minimum requirements. RULE 7. Data from the'surveys required in Rules 1, 2 and 6 of this order shall be filed with the Commission by the last day of the month following the month in which each survey is taken. Form 10-412, Reservoir Pressure Report, shall be used to report the data from these surveys. Data submitted shall include rate, pressure, time, depths, temperature and any well cohditi~n necessary for complete analysis of each survey. The datum for the pressure surveys is 8800 feet subsea. Transient pressure surveys obtained by a shut in buildup test, an injection well pressure fall-off test, a multi-rate test or an interference test are acceptable. Other quantitative methods may be administra- tively approved by the Commission. RULE 8. Results and data from any special reservoir pressure monitoring techniques, tests, or surveys shall also be submitted as prescribed in Rule 7 of this order. DONE at Anchorage, Alaska and dated November 3, 1986. AC~ 'V. Chatte~t.~,/Ch~airman aska Oil and/Gas Conservation Commission W. W. Barnwell, Commissioner Alaska Oil and Gas ConServation Commission Notice of Public Hearing STATE OF ALASKA Alaska Oil and Gas Conservation Commission Re.. Application of ARCO Alaska, Inc. and Standard Alaska Production Company to revise Pres sure Survey rules in Conservation Orders 165, 208 and 213. ARCO Alaska, Inc. and Standard Alaska Production Company, operators of the Prudhoe Bay Unit, by letter of September 26, 1986, have requested changes to Pressure Survey rules contained in Conservation Orders 165, 208 and' 213. The objective of the proposed changes is to establish operator flexibility with regard to monitoring reservoir pressure in a manner which will allow the technical value of all surveys to be maximized. A person who may be harmed if the requested order is issued may file a written protest with the Alaska oil and Gas Conserva- tion 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 t~ Commission's determination, a hearing on the matter will be held at the above address at 9:00 a.m. on November 6, 1986, in con- formance 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 October 20, 1986. If no p~otest is filed, the Commission will consider the issuance of 'the order without a hearing. Commissioner Alaska Oil and Gas Conservation Commission Published October 4, 1986 Arco Alaska, Inc. P. O. Box 100360 Anchorage, AK 99510 Standard Alaska Production Company P. 0. Box 196612 Anchorage, AK 99519 September 26, 1986 C. V. Chatterton, Chairman Oil and Gas Conservation Commission State of Alaska 3001 Porcupine Drive Anchorage, AK 99501 Dear Mr. Chatterton: p, ECEIVED S E P 2 6 198B Alaska 0il & Gas Cons. commission Anchorage Amendment, to..Rule 6, Conser,,v. ati0n Order Number 165 The operators of the Prudhoe Bay Unit, Standard Alaska Production Company and Arco Alaska, Inc., request changes to Rule 6 of Conservation Order No. 165. The proposed amendments were discussed with you at our meeting of August 12, 1986. The objective is to establish operator flexibility with regard to monitoring reservoir pressure in a manner which will allow the technical value of all surveys to be maximized. Rule 6 Proposed amendments to Rule 5 are provided in Attachment I. A discussion of these changes follows: (a) We request that the term "initial sUstained production" be replaced by "regular production", consistent with the definition of "regular" which was recently officially introduced. In addition, we request that the initial pressure survey requirement can be fulfilled by a pressure transient survey should a pressure transient survey be required for technical reasons. C., V, Chatterton, Chairm~n Page 2 (b) We request that a pressure static or transient survey may be used to fulfill the follow-up survey requirement since the primary objective of the follow-up survey is to determine reservoir pressure. During the first nine years of production at Prudhoe Bay, a sizeable pressure build-up data base has been established. Routine pressure build-up surveys are no longer required to determine the production characteristics of select areas of the reservoir. In addition, a time limit of twelve months is requested in place of the current six-month limit. An extension of this time limit will provide the operators with additional flexibility regarding repeat pressure survey timing, thus allowing timing to be optimized based on varying increased voidage rates associated with new wells. (c) & (d) Key well and governmental pressure survey requirements limit flexibility with regards to pressure survey site optimization. Pressure surveillance will be distributed in all areas of the field, however, with waterflood underway, the focus of pressure surveillance is now on the waterflood and gravity drainage/waterflood interaction areas, k "minimum number of surveys" requirement would allow application of surveys to areas which require the maximum technical evaluation from a reservoir management perspective. The operators would inform the Commission of the planned distribution of the required pressure surveys by December 1 of the year preceding the year during which the pressure surveys will be run. (e) Included as per Conservation Order No. 208, Rule 3 (amending Rule 6(e), Conservation Order No. 165). (f), (g), & (h)'These sections have been included and/or modified to be consistent with the changes outlined above and Conservation Order No. 213, Rule i (amending Rule 6(h), Conservation Order No. 165). As noted, the primary purpose of the requested amendments is to afford the operators greater flexibility in fulfilling the Prudhoe Bay Unit's surveillance needs and reporting requirements. It does not represent an attempt to reduce the number of pressure surveys required, but does represent', an attempt to accomplish a more prudent distribution of required surveys. If you desire any further information in support of the requested changes, please feel free to contact us. D. F. Scheve Arco Alaska, Inc. Attachment T. N. Tyler Standard Alaska Production Company RECEIVED SEP 2 6 1 86 Alaska Oi! &.G2s Cons. Commission Anchorage Attachment I Prudhoe Bay Field Prudhoe 0il Pool Conservation Order No. 165 Rule 6 Pre~sure Surveys (a) Prior to regular production, a static bottomhole or transient pressure survey shall be taken on each well. (b) Within the first twelv9 months following the regular production from each well, a static bottomhole Or transient pressure survey shall be taken. (c) & (d) A minimum..,of 9~ add 87 static bo~omhole or transie~ pressure surveys shall be run annually in the Western Operating Are~ and Eastern Operating Area, respectively. The surveys required in either (a) or (b) of this rule can be used to fulfill the minimum requirement. (e) Data from the surveys required in (a), (b), (c) and (d) of this rule shall be filed with the Commission by the last day of the month following the month .in which each survey is taken. Form 10-412, Reservoir Pressure Report, shall be used to report the data from these surveys. Data submitted shall include rate, pressure, time, depths, temperature .and any well condition necessary for complete analysis of each survgy. The datum for the pressure surveys is 8800 feet subsea. Transient pressure surveys obtained by a shut-in buildup test,' an injection well pressure fall-off test, a multi-rate test or an interference test are acceptable. Other quantitative methods may be administratively approved by the Commission. (f) & (g) Results and data from any special reservoir pressure monitoring techniques, tests or surveys shall also be submitted as prescribed in (e) of this rule. (h) By administrative order the Commission may grant time extensions and waive requirements of this rule and by administrative order the Commission may require additional pressure surveys in (c) & .(d.) 0f.this.rule. ~k~&sk~ 0'~ & G&s GoDs. Go~,SS~on Anchor&De 5072m STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION 3001 Porcupine Drive Anchorage, Alaska 99501-3192 Re: THE APPLICATION OF ARCO ) ALASKA, INC. and SOHIO ) ALASKA PETROLEUM COMPANY for) an order amending Rules 6 ) and 11 of Conservation Order) No. 165 and Rule 6 of ) Conservation Order No. 208. ) Conservation Order No. 213 Prudhoe Bay Field Prudhoe Oil Pool October 8, 1985 IT APPEARING THAT: · ARCO Alaska, Inc. and Sohio Alaska Petroleum Company, operators of the Prudhoe Bay Unit, by letter dated September 12, 1985, requested the Alaska Oil and Gas Conservation Commission to amend Rules 6 and 11 of Conservation Order No. 165 and Rule 6 of Conservation Order No. 208 to allow administrative approval for extensions and/or waivers of required pressure surveys, gas-oil contact monitoring and productivity profiles. · Notice of public hearing was published in the Anchorage Times on September 23, 1985. · There were no protests to the request set forth in the notice of public hearing. FINDING: Innovative well completion techniques for the Prudhoe Oil Pool, both currently used and proposed, and maturing of reservoir performance obviate the ability and need to obtain conventional pressure and productivity profile surveys from these types of wells. CONCLUSIONS: · Innovative well completion techniques do not create waste and may enhance ultimate recovery from the Prudhoe Oil Pool. · The Alaska Oil and Gas Conservation Commission requires flexibility to administratively approve variances to previous orders to provide the ability to timely respond to changing conditions. Conservation Or~er No. 213 Page 2 October 8, 1985 NOW, THEREFORE, it is ordered that: Rule 1. Rule 6(h) of Conservation Order No 165 is amended to read: By administrative approval the Commission may grant time extensions and waive requirements of this rule and by administrative order the Commission may require additional pressure surveys or modify the key wells designated in (c) of this rule and as amended in Rule 1 of Conservation Order No. 208. Rule 2. Rule ll(d) of Conservation Order No. 165 is amended to read: By administrative approval the Commission may waive the requirements of (a), (b) and (c) and by administrative order the Commission may specify additional surveys other than the surveys submitted under (a), (b) and (c) of this rule. Rule 3. Rule 6 of Conservation Order No. 208, amending Rule '9'(f) of Conservation Order No. 165 is amended to read: By administrative approval the Commission may delay, modify or waive the logging requirements of Rule 9 of Conservation Order No. 165 and by administrative order, the Commission may require additional wells to be logged. DONE at Anchorage, Alaska and dated October 8, 1985 L'r-V. Ch~-rt~/on~, Chairman Alaska Oil arfd ~as Conservation Commission 'HarrY W.gler, Co~missi0ner Alaska Oil and Gas Conservation Commission 'L~n'~Sm~'t h', CO~i'S's ioner Alaska Oil and Gas Conservation Commission Notice of Public Hearing STATE OF ALASKA Alaska Oil and Gas Conservation Commission Re: The application of ARCO ALASKA, INC. and SOHIO ALASKA PETROLEUM COMPANY dated September 12, 1985, for an order allowing the Alaska Oil and Gas Conservation Commission to administratively approve variances to Conservation Order No. 165, Rules 6 and 11, and Conservation Order No. 208, Rule 6. Notice is hereby given that ARCO Alaska, Inc. and Sohio Alaska Petroleum Company, as operators of the Prudhoe Bay Unit, have requested the Alaska Oil and Gas Conservation Commission to issue an order to revise Conservation Order No. 165, Rules 6 and 11 and Conservation Order No. 208, Rule 6. These revisions would allow the Alaska Oil and Gas Conservation Commission to adminis- tratively approve time period extensions and/or waivers to the pressure survey, gas-oil contact monitoring and productivity profile requirements for individual wells. Completion technique employed, unusual producing characteristics or well bore mechan- ical problems may cause delays in obtaining required data. These revisions would enable the Commission to deal with individual well problems in a timely fashion. Parties who may be aggrieved if the referenced order is issued 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 Conservation Commis- sion, 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 October 7, 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. Kugle~ Commis s ioner Alaska Oil & Gas Conservation Commission {~~ SOHIO ALASKA PETROLEUM COMPANY ~ 3111 "C" STRE '/--:.-~¥-~ ANCHORAGE, AL~ _]~ TELEPHONE (90~ 51 ~1~1~ MAIL: POUCH 6-¢-~-[ 3 ANCHORAGE ALASKA ~¢-~¢,-'; January 21, 1985 ~ ...~ .... _ ~'~ ~t" I 3G~L '/1 J ~ ?~ STATTEC j · - ~ ~ -- ~aska O&~ & Gas Co~se=~a~o~ Co~&ss&oa ~ ' "~ ' ' 3001 Porcupine Drive D,V Anchorage, Alaska 99510 .~,(~..~..~'~..~.~,/.,... Dear Mr. Chatterton: ~)~ ~'~'~ (~ S-Pad Key Well Designation Sohio Alaska Petroleum Company hereby requests that Prudhoe Bay Unit Well S-8 be designated to serve as key well for S-pad in the bottom hole pressure survey program. S-pad does not currently have a designated key-well. If you have any questions, please contact C. J. Phillips at 564-4302. Very t. ruly yours, A. E. Leske Manager, Reservoir Operations TMD:AEL:pw 2331m cc: V. W. Holt C. J. Phillips T. M. Delbuguet RECeIvED JAN 2 5 985 Alaska Oil & Gas Cons. Commission Anchorage 55'.45 01 11, 5 / .8 5 e. 1t15/,~5 ,. NOTICE OF PUBLIC HEARING .. ' , ' . ' STATE OF'ALASKA' ~ i AlaSka OHand Gas Cops!rvallon ¢omml~16n- ' Re: The application of;' ARCO ALASKAi, lNG.', and $0HI0 ALASKA PETROLEUM COMPANY reqbest, lng.-,amendment, of RUles 6, 9, and ]0 of Conservation Order No~.]~,:.. . Notice 'is hereby given.that ARCO Alaska, '"in~. and Sohio Alaska PetrOleum'r Company~ have :requested ,the AlaSka Oil and Gas. COnservation CommlsSlo'n to amend Rules"*6,*'9,' and 10'of Conservation Order'No. 165, dated,June 6/1980. The amendments are requested because...ol~tatio, nal experience. ~ow reclulres a greatei- flexibility In data gathering .... , Parties who'may beaggrleVecl,lf the'referencedi~(!~e'r Is Issued g.r.antlng the "referenced request' are 6'lloWed: 10'"~ddyS .frbm' the' ' aare of this. Pub Icati0n In whi~:h t0 tile a wr ttert'i~rotest stating '. In detail the' nature 'of thelraggrlevement and. tl~IHr,~'reciuest.for a heatlog. The Place of filing Is the Alaska Oil.and Gas' Conserva- ~l~o.n..c.o.m. ml.sslon,: .30~.1 P.o. rcUpIne Drlv.e, Agchorage, Alaska y¥~ul. ,. Sucn a prmesr Is timely flied', 'a nearmg.'on the matter .will.be heldat'the above address at 9:00 AM on January 29,1985 at whlch't'ime,.protestants and. others may be heard~ li~no such' protest Is timely flied, .theCommlssl'on will consider the Issuance ~of the order wlthout,a~hearlng. ",/s/ Harry W. Kugler' Comr~l'ssloner Alaska 011 and Gas conservation ' Commission Rub: January 15, 1985 · PO: TO Bff;~"OR[!; t~.,iE 1.,~I8 ................. . 15 il) l~.Y O:,F JAt~,!,1985 Notice of Public Hearing STATE OF ALASKA Alaska 0il and Gas Conservation Commission Re: The application of ARCO ALASKA, INC. and SOHIO ALASKA PETROLEUM COMPANY requesting amendment of Rules 6, 9, and 10 of Conservation Order No. 165. Notice is hereby given that ARCO Alaska, Inc. and Sohio Alaska Petroleum Company have requested the Alaska Oil and Gas Conservation Commission to amend Rules 6, 9, and 10 of Conser- vation Order No. 165, dated June 6, 1980. The amendments are requested because operational experience now requires a greater flexibility in data gathering. Parties who may be aggrieved if the referenced 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. If such a protest is timely filed, a hearing on the matter will be held at the above address at 9:00 AM on January 29, 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. Harry W. Kugler Commis s ioner Alaska Oil & Gas Conservation Commission ARCO Alaska, Inc. P. O. Box 100360 Anchorage, AK 99510 C. V. Chatterton, Chairman Oil and Gas Conservation Commission State of Alast<a 3001 Porcupine Drive Anchorage, AK 99501 Sohio Alaska Petroleum Co mpany Anchorage, AK 99502 December 28, 1984 ;~', ~{.~ ~ ~-g~-'- .... t Amendment to Rules 6, 9, and 10, Conservation Order Number 165 Dear Mr. Chatterton: The operators of the Prudhoe Bay Unit, Sohio Alaska Petroleum Company and A}~Co Alaska, Inc. respectfully request several amendments to Rules 6, 9, and 10 of Conservation Order #165. As described herein, these proposed amendments reflect the overall desire to further streamline and enhance surveillance operations and reporting within the Prudhoe Bay Unit. We feel it is timely that these changes be adopted in view of our production experience to date, as well as the operational changes brought about by the startup of Beaufort Sea water injection in June 1984. Rule 6 ~'?e request that Rules 6 c, d, and e be amended to read as shown in Attachment I. The primary purpose of these proposed amendments is to allow the Operators more flexibility in performing pressure surveys in wells that are necessarily shut-in for varying lengths of time due to facility shutdowns, reservoir management considerations, high water production or low productivity. ?he rule changes allow a wider array of pressure measurements to be applied towards fulfilling our routine surveillance requirements. Specifically, inclusion of injection well pressure fall-off tests, now possible with waterflood startup, and static measurements will afford better reservoir pressure information. The proposed change to Rule 6e also deletes specification of a 24-hour well shut-in time for pressure buildup tests. Doing so will provide the flexibility to minimize unnecessarily long shut-in times for many wells in the field and, as such, enhance production capacity. Also, some Iow-productivity wells may require more than a 24-hour shut-in time, emphasizing the need to evaluate each well independently. The appropriate shut-in time for each well will be determined using guidelines which are based on industry practice and experience. This request follows thorough study within the Unit and is made with confidence that the quality of future p_ressure data obtained will not be compromised. 'RECE-tV E J^N 0 7 1 985 Alaska Oil & Gas Cons. Commission Anchorage' C. V. Chatterton Page 2. December 28, 1984 Rule 9 ¥~e request that Rule 9 covering Gas-Oil Contact monitoring be amended to read as shown in Attachment II. In effect, these amendments replace the GOC key well monitoring program of semiannual surveys on 20 designated wells with 40 annual surveys to be run on undesignated wells to be selected by the Operators (Rule 9b). The wells would be selected on the basis of current surveillance data, field performance, well data, and previous logging results. ¥'~hile the existing rules have served a useful purpose, we believe that the proposed approach will prove to be more effective and efficient in the coming years. The amendments will enable us to optimize the gas monitoring program and enhance the quality of meaningful surveillance information. 'l~he existing key well program was adopted as a change to Rule 9 on June 6, 1980, as the means of developing a general understanding of the gas movement occurring in the Sadlerochit Reservoir. A substantial data base has since been acquired over the past four years and as a result, gas movements are now well understood. As such, the original goal of the key well program has been accomplished. Identifying specific areas of gas influx and associated gas producing mechanisms have become the primary objectives of the GOC monitoring program. To better monitor areas of high gas movement efficiently, more flexibility is desirable in selecting the wells to be surveyed. By allowing the Operators to select the wells for future surveys, coverage of critical areas will be optimized. Data collected to date indicates that GOC movement is generally small over a six-month period, and thus less frequent surveys would have been as effective in monitoring gas movements. By reducing the number of repeat logging surveys in key wells and increasing the areal coverage of surveys by logging other wells, more valuable data on areal gas movement will be obtained. Ten of the original key wells have become unsuitable for gas monitoring use and have been replaced by approval of the Commission since 1982. It is anticipated that in the near future, several more key wells will have to be replaced for reasons including vertical gas movement down to the perforations because of coning or channeling, water injection well conversions, the elimination of free gas in waterflood areas, and mechanical recompletion such as straddle packs. Approval of these proposed amendments to Rule 9 will alleviate the formal procedure to replace key wells, and result in a more efficient and effective gas monitoring program as the field matures. · JA 0 ? ]985 Alaska Oil & 6~s Cons. Commission Anchorage C. V. Chatterton Page 3. December 28, 1984 Rule 10 We request Rule 10 be amended to read as shown in Attachment Iii. ?he requested changes eliminate reference to a possible key well cased hole oil-water contact monitoring program and specify that the discussion of cased hole water monitoring logs be presented as part of the PBU annual waterflood surveillance report rather than as a separate submission. In the most recent Oil-~ater Contact Monitoring Report, submitted June 30, 1984, major limitations in existing cased hole water monitoring tools were identified. Furthermore, future water movement will be influenced more by waterflood operations than by influx from the aquifer. Thus, as waterflood will be the dominant water movement mechanism, diminishing amounts of useful information could be expected from a key well oil-water contact monitoring program. As noted earlier, the primary purpose of the above requested amendments is to afford the operators greater flexibility in fulfilling the Prudhoe Bay Unit's surveillance needs and reporting requirements. If you desire any further information in support of the requested changes, please contact Mr. A. E. Leske (Sohio Alaska Petroleum Company, 564-4571) or 1\.Ir. D. F. Scheve (ARCo Alaska, inc., 263-4248). L. E. Tate Vice President Engineering & Extension Exploration ARCo Alaska, Inc. Sincerely, P. J. Martin Vice President Operations Sohio Alaska Petroleum Company Attachment RECEIVED J A N 0:7 '1 85 Alaska Oil & Gas Cons, Commission Anchorage ATTACHMENT 1 PBU SADLEROCHIT PROPOSED AMENDMENTS TO RULE 6 CONSERVATION ORDER 165 Rule 6c "One specific well of each producing pad or drill site shall be designated as a key well. Semiannual transient .pressure surveys or static pressure surveys shall be conducted on each well..." Rule 6d "An annual transient pressure survey or a static pressure survey shall be conducted on one well in each governmental section from which oil is being produced. The surveys required in either (b) or (c) of this rule can be used to fulfill this requirement." Rule 6e "... Transient surveys obtained by a shut-in buildup test, an injection well pressure fall off survey, multi-rate tests, interference tests, or other quantitative methods will be acceptable." 12/28/84 RECEIVED ,.tAF, i 0 7 Alaska Oil & Gas Coris. Commissio~ Anchorage ATTACHMENT II PBU SADLEROCHIT PROPOSED AMENDMENTS TO RULE 9 CONSERVATION ORDER 165 (a) Prior to initial sustained production, a cased or open-hole neutron log shall be run in each well. (b) A minimum of 40 repeat cased hole neutron log surveys shall De run fieldwide annually. (e) An annual report shall be submitted to the Commission by July 1 of each year which shall include a summary of the wells surveyed, an analysis of the surveys, and an analysis of the gas-oil contact behavior. (d) The neutron logs run on any well and those required in (a) and (b) of this rule shall be filed with the Commission by the last day of the month following the month in which the logs were run. (e) By administrative order, the Commission may require additional wells to be logged. 12/21/84 RECEIVED J AN 0 7 1. 85 Alaska. Oil & (}as Cor~s. Comm{ssion Anchoraf~e ATTACHMENT III PBU SADLEROCHIT PROPOSED AMENDMENTS TO RULE 10 CONSERVATION ORDER 165 "a) the Operators shall continue an evaluation program to determine the oil-water contact monitoring capability of various cased hole logs. A discussion of progress made in cased hole evaluation techniques shall be included as part of the annual waterflood surveillance report, submitted to the Commission by August 1 of each year. "b) Ail cased hole logs run for this purpose shall be filed with the Commission by the last day of the month following the month in which each log was run." 12/21/84 RECEi'VED JAN 0 7 1 85. Alaska Oi~ & Gas Cons,, Commission Ancho~'a.qe ARCO Alaska, Inc. P. O. Box 100360 Anchorage, AK 99510 C. V. Chatterton, Chairman Oil and Gas Conservation Commission State of Alaska 3001 Porcupine Drive Anchorage, AK 99501 __I ZI I · · - I " I .... :1 ' Sohio Alaska Petroleum Oompan~ Anchorage, AK 99502 ' '..".',':. December 28, 1984 - I STArT~C-- ~ STAT 1~C- CONFEr: FILF: Amendment to Rules 6, 9, and 10, Conservation Order Number 165 Dear Mr. Chatterton: The operators of the Prudhoe Bay Unit, Sohio Alaska Petroleum Company and ARCo Alaska, Inc. respectfully request several amendments to Rules 6, 9, and 10 of Conservation Order #165. As described herein, these proposed amendments reflect the overall desire to further streamline and enhance surveillance operations and reporting within the Prudhoe Bay Unit. We feel it is timely that these changes be adopted in view of our production experience to date, as well as the operational changes brought about by the startup of Beaufort Sea water injection in June 1984. Rule 6 ~'le request that Rules 6 c, d, and e be amended to read as shown in Attachment I. The primary purpose of these proposed amendments is to allow the Operators more flexibility in performing pressure surveys in wells that are necessarily shut-in for varying lengths of time due to. facility shutdowns, reservoir management considerations, high water production or low productivity. The rule changes allow a wider array of pressure measurements to be applied towards fulfilling our routine surveillance requirements. Specifically, Inclusion of injection well pressure fall-off tests, now possible with waterflood startup, and static measurements will afford better reservoir pressure information. The proposed change to Rule 6e also deletes specification of a 24-hour well shut-in time for pressure buildup tests. Doing so will provide the flexibility to minimize unnecessarily long shut-in times for many wells in the field and, as such, enhance production capacity. Also, some low-productivity wells may require more than a 24-hour shut-in time, emphasizing the need to evaluate each well independently. The appropriate shut-in time for each well will be determined using guidelines which are based on industry practice and experience. This request follows thorough study within the Unit and is made with confidence that the quality of fature p_re_ssu_re_ data .obtained will not be compromised. '[~ IZ (~ I~ IV E D JAN 0 ? 1985 Alaska Oil & Gas Cons. Commission Anchorage C. V. Chatterton Page 2. December 28, 1984 Rule 9 ¥{e request that Rule 9 covering Gas-Oil Contact monitoring be amended to read as shown in Attachment II. In effect, these amendments replace the GOC key well monitoring program of semiannual surveys on 20 designated wells with 40 annual surveys to be run on undesignated wells to be selected by the Operators (Rule 9b). The wells would be selected on the basis of current surveillance data, field performance, well data, and previous logging results. While the existing rules have served a useful purpose, we believe that the proposed approach will prove to be more effective and efficient in the coming years. The amendments will enable us to optimize the gas monitoring program and enhance the quality of meaningful surveillance information. · The existing key well program was adopted as a change to Rule 9 on June 6, 1980, as the means of developing a general understanding of the gas movement occurring in the Sadlerochit Reservoir. A substantial data base has since been acquired over the past four years and as a result, gas movements are now well understood. As such, the original goal of the key well program has been accomplished. Identifying specific areas of gas influx and associated gas producing mechanisms have become the primary objectives of the GOC monitoring program. To better monitor areas of high gas movement efficiently, more flexibility is desirable in selecting the wells to be surveyed.' By allowing the Operators to select the wells for future surveys, coverage of critical areas will be optimized. Data collected to date indicates that GOC movement is generally small over a six-month period, and thus less frequent surveys would have been as effective in monitoring gas movements. By reducing the number of repeat logging surveys in key wells and increasing the areal coverage of surveys by logging other wells, more valuable data on areal gas movement will be obtained. Ten of the original key wells have become unsuitable for gas monitoring use and have been replaced by approval of the Commission since 1982. It is anticipated that in the near future, several more key wells will have to be replaced for reasons including vertical gas movement down to the perforations because of coning or channeling, water injection well conversions, the elimination of free gas in. waterflood areas, and mechanical recompletion such as straddle packs. Approval of these proposed amenclments to Rule 9 will alleviate the formal procedure to replace key wells, and result in a more efficient and effective gas monitoring program as the field matures. RECEIVED JAN 0 7 ]985 Alaska Oil & Gas Cons. Commission Anchorage C. V. Chatterton Page 3. December 28, 1984 Rule 10 We request Rule 10 be amended to read as shown in Attachment Ill. The requested changes eliminate reference to a possible key well cased hole oil-water contact monitoring program and specify that the discussion of cased hole water monitoring logs be presented as part of the PBU annual waterflood surveillance report rather than as a separate submission. In the most recent Oil-¥?ater Contact Monitoring Report, submitted June 30, 1984, major limitations in existing cased hole water monitoring tools were identified. Furthermore, future water movement will be influenced more by waterflood operations than by influx from the aquifer. Thus, as waterflood will be the dominant water movement mechanism, diminishing amounts of useful information could be expected from a key well oil-water contact monitoring program. As noted earlier, the primary purpose of the above requested amendments is to afford the operators greater flexibility in fulfilling the Prudhoe Bay Unit's surveillance needs and reporting requirements. If you desire any further information in support of the requested changes, please contact Mr. A. E. Leske (Sohio Alaska Petroleum Company, 564-4571) or Mr. D. F. Scheve (ARCo Alaska, Inc., 263-4248). L. E. Tate Vice President Engineering & Extension Exploration AI{Co Alaska, Inc. Sincerely, P. J. Martin Vice President Operations Sohio Alaska Petroleum Company Attachment RECEIVED JAN 0 7 1985 Alaska Oil & Gas Cons. Commission Anchorage ATTACtlMENT 1 PBU SADLEROCHIT PROPOSED AMENDMENTS TO RULE 6 CONSERVATION ORDER 165 Rule 6c "One specific well of each producing pad or .drill site shall be designated as a key well. Semiannual transient .pressure su. rveys or static pressure surveys shall be conducted on each well..." Rule 6d "An annual transient pressure survey or a static pressure survey shall be conducted on one well in each governmental section from which oil is being produced. The surveys required in either (b) or (c) of this rule can be used to fulfill this requirement." Rule 6e "...Transient surveys obtained by a shut-in buildup test, an injection well pressure fall off survey, multi-rate tests, interference tests, or other quantitative methods will be acceptable." 12/28/84 RECEIVED JAN 0 7 1985 Alaska Oil & Gas Cons. Commission Anchorage ATTACHMENT II PBU SADLEROCHIT PROPOSED AMENDMENTS TO RULE 9 CONSERVATION ORDER 165 · . (a) Prior to initial sustained production, a cased or open-hole neutron log shall be run in each well. (b) A minimum of 40 repeat cased hole neutron log surveys shall be run fieldwide annually. (e) An annual report shall be submitted to the commission by July 1 of each year which shall include a summary of the wells surveyed, an analysis of the surveys, and an analysis of the gas-oil contact behavior. (d) The neutron logs run on any well and those required in (a) and (b) of this rule shall be filed with the Commission by the last day of the month following the month in which the logs were run. (e) By administrative order, the .Commission may require additional wells to be logged. 12/21/84 RECEIVED JAN 0 7 1985 Alaska Oil & Gas Cons. Comrnisslon Anchorage ATTACtIMENT III PBU SADLEROCHIT PROPOSED AMENDMENTS TO RULE 10 CONSERVATION ORDER 165 "a) the Operators shall continue an evaluation program to determine the oil-water contact monitoring capability of various cased hole logs. A discussion of progress made in cased hole evaluation techniques shall be included as part of the annual waterflood surveillance report, submitted to the Commission by August 1 of each year. "b) All cased hole logs run for this purpose shall be filed with the Commission by the last day of the month following the month in which each log was run." 12/21/84 RECEIVED JAN 0 7 1985 Alaska Oil & Gas Cons. Commission Anchorage