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Home My WebLink AboutAIO 004 D ) ) Image Project Order File Cover Page XHVZE This page identifies those items that were not scanned during the initial production scanning phase. They are available in the original file, may be scanned during a special rescan activity or are viewable by direct inspection of the file. !\!.o nOl(D Order File Identifier Production Scanning Stage 1 Page Count from Scanned File: f 7 (0 (Count does include cover sheet) Page Count Matches Number in scannJing Preparation: V YES BY C Maria ') Date: Id- b / è)l; If NO in stage 1, page(s) discrepancies were found: Organizing (done) 111I1I11111111 I11I1 D Two-sided RESCAN ~olor Items: D Greyscale Items: DIGITAL DATA D Diskettes, No. D Other, No/Type: D Poor Quality Originals: D Other: NOTES: BY: ~ Date:Já 'Ip /0:5" Project Proofing BY: C Maria ") Date:j~.' bl ~ Scanning Preparation BY: ~ Maria~ x 30 = Date: Ia-, ' (0 / D!!;' Stage 1 BY: Maria Date: Scanning is complete at this point unless rescanning is required. ReScanned BY: Maria Date: Comments about this file: o Rescan Needed 111I111111111111111 OVERSIZED (Scannable) D Maps: D Other Items Scannable by a Large Scanner OVERSIZED (Non-Scannable) o Logs of various kinds: o Other:: vvrP 1111111111111111111 Vl1~ /5/ /5/ + = TOTAL PAGES l76 (Count does not include cover sheeq" .~f') 151 VV( ,- 1111111111111111111 NO 15/ Mr YES NO /51 II 11III I III /51 Quality Checked 1111111111111111111 10/6/2005 Orders File Cover Page.doc e 1. August 11, 2005 2. August 19, 2005 3. August 29, 2005 4. September 1, 2005 5. September 13,2005 6. October 6, 2005 7. October 6,2005 8. November 3, 2005 9. December 2, 2005 10. December 29,2005 e Index Area Injection Order 4D PRUDHOE BAY, PUT RIVER BP Exploration (Alaska), Inc. request to amend CO 460 for Prudhoe Bay Oil Pool and AIO 4C to include the Put River Sandstone (Superseded 8/22/05) BP Exploration (Alaska), Inc. request to amend CO 460 for Prudhoe Bay Oil Pool and AIO 4C to include the Put River Sandstone E-mail notifying AOGCC to notice request for hearing Notice of Hearing, affidavit of publication, address and e-mail notifications BP Exploration (Alaska), Inc. Addendum to Section V Transcript of hearing Sign In Sheet for Hearing BP Exploration (Alaska), Inc. Addendum to Section VI Jerry McCutcheon's request for a rehearing Order Preliminarily granting rehearing Area Injection Order 4D All Annual reports are located in the Field Files ) ) STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION 333 West 7th Avenue, Suite 100 Anchorage, Alaska 99501 Re THE APPLICATION OF BP EXPLORATION (ALASKA) INC. for an order to modify Area Injection Order 4C to include the Put River Sandstone Member of the Kalubik Formation in the authorized injection strata for enhanced recovery; and THE PROPOSAL initialed by the Commission to amend underground inj ection orders to incorporate consistent language addressing the mechanical integrity of wells IT APPEARING THAT: ) ) ) ) ) ) ) Area Injection Order 4D Prudhoe Bay Field Prudhoe Oil Pool Put River Oil Pool December 2, 2005 1. By letter dated August 19, 2005 BP Exploration (Alaska), Inc. ("BPXA"), Operator of the Prudhoe Bay Unit, applied for a modification of Conservation Order 341 D and Area Injection Order 4C to include the Put River Sandstone Member of the Kalubik Formation ("PRS") within the Prudhoe Oil Pool definition and to authorize injection for enhanced recovery purposes within the interval. 2. The Alaska Oil and Gas Conservation Commission ("Commission") published notice of opportunity for public hearing in the Anchorage Daily News on September 1,2005. 3. On September 13 and September 30, 2005 BPXA submitted addenda addressing questions by the Commission staff concerning its application. 4. The Commission held a public hearing October 6, 2005 at the Alaska Oil and Gas Conservation Commission at 333 West ih Avenue, Suite 100, Anchorage, Alaska 99501. 5. The Commission received no protests to or comments on BPXA' s application. 6. BPXA supplied additional information as requested by the Commission on November 3, 2005. 7. On its own motion the Commission proposed to amend the rules addressing mechanical integrity in all existing orders authorizing underground injection. The Commission published notice of opportunity for public hearing on the proposal in the Anchorage Daily News on October 3, 2004 to consider amendment of underground injection orders to incorporate consistent language addressing the mechanical integrity of injection wells. A hearing was tentatively scheduled for November 4, 2004. Area Injection Order 4D December 2, 2005 ) ) Page 2 8. Bye-mail dated October 15, 2004, BPXA suggested edits to the Commission's proposed language addressing the mechanical integrity of injection wells. 9. No protests to the Commission's proposal or requests for hearing were received, and the scheduled hearing was vacated. FINDINGS: 1. CO 559 and CO 341E: The findings of Conservation Orders No. 559 and 341E are incorporated by reference. 2. Operator: BPXA is Operator of the property in the area in which injection is proposed. 3. Injection Strata BPXA requested that the PRS be added as an allowable injection stratum. The PRS is the sandstone interval that correlates with the interval 9,638 to 9,719 measured feet on the Borehole Compensated Sonic Log, Run 2, dated September 28, 1975, in the Atlantic Richfield-Exxon NGI No. 1 well. BPXA requested the addition of this sandstone interval within the definition of the Prudhoe Oil Pool. 4. Proposed Injection Area: The hydrocarbon-bearing interval of the PRS lies entirely within the area of the approved affected area of AIO 4C. No changes have been requested for the affected area of AIO 4C. 5. Operators/Surface Owners Notification: At the time of the application BPXA had not proposed a well for injection service. BPXA will provide an affidavit showing that the Operators and Surface Owners within one-quarter mile radius of each proposed injector have been notified upon application for a Permit to Drill or Application for Sundry Approval for any injection wells. 6. Description of Operation: The PRS is located within the Prudhoe Bay Unit and overlies the Prudhoe Oil Pool in the vicinity of Drill Sites 1, 2, 5, 6, 15, 18, NGI, and WGI. A reservoir model is currently being constructed to evaluate development options. Four vertically significant and laterally extensive sandstone lobes have been correlated within the PRS interval. There is no pressure communication between the four locally deposited sandstone lobes. Each of the lobes are laterally interbedded with shales of the Kalubik Formation. They are termed the Southern, Central, Western, Northern Lobes. The Southern and Central Lobes are saturated with black oil and the Western and Northern Lobes contain gas condensate. Development of the largest black oil accumulation, the Southern Lobe, is anticipated to include one to five production wells and one to five injection wells. Development plans for this accumulation are being evaluated. The Northern Lobe is in pressure communication with the gas cap of the Prudhoe Oil Pool, and the definition of the Prudhoe Oil Pool has been expanded to include the Area Injection Order 4D December 2, 2005 ) ) Page 3 Northern Lobe. 7. Hydrocarbons In Place and Hydrocarbon Recovery: There are no indications of a free gas column in the Southern or Central Lobes. Estimated hydrocarbons in place are as follows: Lobe Southern Central Western Northern Estimated Oil in Place, MMSTB 12.6-19.2 1.1-2.7 nla n/a Estimated Gas in Place, BCF 6.9-10.5 .5-1.3 69.6-104.4 108.4-160.4 Using material balance calculations for the Southern and Central Lobes, primary depletion is estimated to recover approximately 10% of the STOlP. Early screening of analog reservoirs suggests incremental recovery of 10-25% with waterflood. No discussion was provided concerning the benefits of enriched gas injection. 8. Geologic Information: The Northern Lobe of the PRS is in depositional contact, and pressure communication with the Sag River Formation portion of the Prudhoe Oil Pool. The Commission has expanded the Prudhoe Oil Pool to include the Northern Lobe of the PRS with the issuance of CO 341E. The remaining lobes of the PRS, including the targeted waterflood development area of the Southern Lobe, are hydraulically isolated from the Prudhoe Oil Pool and each other. The Southern, Central and Western Lobes of the PRS comprise the Put River Oil Pool as defined in CO 559. BPXA's application and Conservation Order 559 provide a discussion of the Put River Oil Pool development. 9. Well Logs: The logs of existing injection wells are on file with the Commission. 10. Mechanical Integrity and Well Design of Injection Wells: The casing programs for injectors will be permitted and completed in accordance with 20 AAC 25.030. Cement bond logs will be run on all injection wells to demonstrate isolation of injected fluids to the PRS. 11. Type of Fluid / Source: Fluids requested for injection for the purposes of pressure maintenance and enhanced recovery are: a) produced water from Prudhoe Bay Unit production facilities; b) source water from the Seawater Treatment Plant; c) fluids injected for purposes of stimulation per 20 AAC 25.280(a)(2), consistent with other North Slope field practices; d) tracer survey fluid to monitor reservoir performance, consistent with other North Slope field practices; and Area Injection Order 4D December 2, 2005 ) ) Page 4 e) miscible injectant. 12. Water Composition and Compatibility with Formation: The main fluid source will be source water from the Seawater Treatment Plant. No significant compatibility issues are anticipated between the formation and injected fluid. Analyses of core samples from Put River Formation sandstone in Prudhoe Bay Unit Well 2-14 demonstrate similar clay mineral types and proportions as those in Kuparuk River Formation reservoirs in adjacent North Slope fields. Each of the analog fields has a successful history of waterflooding and based on these comparisons the Put River Formation is not anticipated to have compatibility issues related to seawater injection. 13. Injection Rates and Pressures, Fracture Information: The expected average surface water injection pressure for the PRS is 1800 psig. The maximum water injection pressure is 2600 psig, or 5950 psig bottom hole. The sandstone in the Southern Lobe where injection is being evaluated has 80-100 feet of Kalubik Formation above and 150-200 feet of Kingak Shale below. With the bounding shale thicknesses, the expected maximum injection pressure would not initiate or propagate fractures through the confining strata. 14. Underground Sources of Drinking Water: No underground sources of drinking water are known to exist beneath the area covered by this order, the Eastern Operating Area of the Prudhoe Bay Unit and the Pt. McIntyre Oil Field. 15. Mechanical Integrity of Injection Wells and Wells within 'l4 mile of injector: A report on the mechanical condition of each well that has penetrated the PRS within one-quarter mile radius of a proposed injection well will be provided to the Commission with each application for a Permit to Dill or Application for Sundry Approval for an injection well. Changes proposed by the Commission in the rules governing demonstration of mechanical integrity, well integrity failure and confinement, and administrative actions will improve clarity, reduce the potential for confusion, and better protect mechanical integrity of injection wells. CONCLUSIONS: 1. The conclusions of CO 559 and CO 341 E are incorporated by reference. 2. The application requirements of 20 AAC 25.402 have been met. 3. Initial development will target oil reserves in the Southern Lobe of the Put River Oil Pool. 4. Water injection will significantly improve recovery within the Southern Lobe of the Put River Oil Pool. Are~ Injection Order 4D December 2,2005 ') ') Page 5 5. Further rules on depletion plans and appropriate enhanced recovery operations are incorporated within CO 559. 6. There are no known or anticipated compatibility problems between the PRS and the requested injectants. 7. The proposed inj ection operations will be conducted in permeable strata, which can reasonably be expected to accept injected fluids at pressures less than the fracture pressure of the confining strata. 8. Injected fluids will be confined within the appropriate receiving intervals by impermeable lithology, cement isolation of the wellbore and appropriate operating conditions. 9. Reservoir and well surveillance, coupled with regularly scheduled mechanical integrity tests, will demonstrate appropriate performance of the enhanced oil recovery project or disclose possible abnormalities. 10. Revisions as proposed by the Commission are appropriate concerning the rules governing demonstration of mechanical integrity, well integrity failure and confinement, and administrative actions. NOW, THEREFORE, IT IS ORDERED 1. Rule 1 of Area Injection Order No. 4C (corrected) is amended to include the following in the authorized. injection strata for the injection of fluids described in Finding 9 of this order for purposes of pressure maintenance and enhanced recovery: a. the Prudhoe Oil Pool as defined in Conservation Order No. 341E; b. the Put River Oil Pool as defined in Conservation Order No. 559. 2. Rule 4 of Area Injection Order No. 4C (corrected) is amended to read: Rule 4 Monitorin2 the Tubin2-Casin2 Annulus Pressure Variations The tubing and casing annuli pressures of each injection well must be monitored at least daily, except if prevented by extreme weather condition, emergency situations, or similar unavoidable circumstances. Monitoring results shall be documented and made available for Commission inspection. 3. Rule 5 of Area Injection Order No. 4C (corrected) is revoked. 4. Rule 6 of Area Injection Order NO. 4C (corrected) is hereby amended to read: Area Injection Order 4D December 2, 2005 ) ') Page 6 Rule 6 Demonstration of Tubin2/Casin2 Annulus Mechanical Inte2rity A Commission-witnessed mechanical integrity test must be performed after injection is commenced for the first time in a well, to be scheduled when injection conditions (temperature, pressure, rate, etc.) have stabilized. Subsequent tests must be performed at least once every four years thereafter (except at least once every two years in the case of a slurry injection well). The Commission must be notified at least 24 hours in advance to enable a representative to witness mechanical integrity tests. Unless an alternate means is approved by the Commission, mechanical integrity must be demonstrated by a tubing/casing annulus pressure test using a surface pressure of 1500 psi or 0.25 psi/ft multiplied by the vertical depth of the packer, whichever is greater, that shows stabilizing pressure and does not change more than 10 percent during a 30-minute period. Results of mechanical integrity tests must be readily available for Commission inspection. 5. Rule 7 of Area Injection Order No. 4C (corrected) is amended to read: Rule 7 Well Inte2rity Failure and Confinement Whenever any pressure communication, leakage or lack of injection zone isolation is indicated by injection rate, operating pressure observation, test, survey, log, or other evidence, the Operator shall notify the Commission by the next business day and submit a plan of corrective action on a Form 10-403 for Commission approval. The Operator shall immediately shut in the well if continued operation would be unsafe or would threaten contamination of freshwater, or if so directed by the Commission. A monthly report of daily tubing and casing annuli pressures and injection rates must be provided to the Commission for all injection wells indicating well integrity failure or lack of injection. Area Injection Order 4D December 2, 2005 ) ) Page 7 6. Rule 9 of Area Injection Order No. 4C (corrected) is amended to read: Rule 9 Administrative Action Unless notice and public hearing are otherwise required, the Commission may administratively waive or amend any rule stated above as long as the change does not promote waste or jeopardize correlative rights, is based on sound engineering and geoscience principles, and will not result in fluid movement outside of the authorized inj ection zone. DONE at Anchorage, Alaska and dated December 2, 2005. ." - ~ ~"~ °l~ ~Ii\llll~~\~ I ~ i;¡~'. /--" / ""'-1\ ø '" .:~V"'~ V .......... ...'" ~:~~. ,\~,......,.~..... " J J' 1 ~ JlJ, 'r' ... .~ , ..., ::.:..- I ¿::~~"h I .'1 ,,". ,;,~", . "~.. rp:. ),': ,1,"::'1: " ~ t 'i I \ \'\ ", , , \' ,:, ". \ ¡'\I 11\ "'1 ;" ':. ~" "\ ,I, I /..... ...~ ~ II. ~'I ~ ~"\\',~ " ~'" .:, '. I t ~ /1 .1I~~ '^ ~"'"r"",,, "1' ,,' ,,' . "'~) ;;'\" ~I~~~)F'~::~';.' I, ' ., },::",;<:~::~';/í .. .}. ~. . , ,'>,1 ~')'"'" "":~','::~: ':;\ ':~;~~/ I... Daniel T. Seamoµ t, Jr. Commissioì1e~// AS 31.05.080 provides that within 20 days after receipt of written notice of the entry of an order, a person affected by it may file with the Commission an application for rehearing. A request for rehearing must be received by 4:30 PM on the 23rd day following the date of the order, or next working day if a holiday or weekend, to be timely filed. The Commission shall grant or refuse the application in whole or in part within 10 days. The Commission can refuse an application by not acting on it within the 10-day period. An affected person has 30 days from the date the Commission refuses the application or mails (or otherwise distributes) an order upon rehearing, both being the final order of the Commission, to appeal the decision to Superior Court. Where a request for rehearing is denied by non action of the Commission, the 30-day period for appeal to Superior Court runs from the date on which the request is deemed denied (i.e., 10th day after the application for rehearing was filed). ) ) Citgo Petroleum Corporation PO Box 3758 Tulsa, OK 74136 Mary Jones XTO Energy, Inc. Cartography 810 Houston Street, Ste 2000 Ft. Worth, TX 76102-6298 David McCaleb IHS Energy Group GEPS 5333 Westheimer, Ste 100 Houston, TX 77056 Mona Dickens Tesoro Refining and Marketing Co. Supply & Distribution 300 Concord Plaza Drive San Antonio, TX 78216 Robert Gravely 7681 South Kit Carson Drive Littleton, CO 80122 George Vaught, Jr. PO Box 13557 Denver, CO 80201-3557 Jerry Hodgden Hodgden Oil Company 408 18th Street Golden, CO 80401-2433 Richard Neahring NRG Associates President PO Box 1655 Colorado Springs, CO 80901 John Levorsen 200 North 3rd Street, #1202 Boise, ID 83702 Kay Munger Munger Oil Information Service, Inc PO Box 45738 Los Angeles, CA 90045-0738 Samuel Van Vactor Economic Insight Inc. 3004 SW First Ave. Portland, OR 97201 Michael Parks Marple's Business Newsletter 117 West Mercer St, Ste 200 Seattle, WA 98119-3960 Mark Wedman Halliburton 6900 Arctic Blvd. Anchorage, AK 99502 Schlumberger Drilling and Measurements 2525 Gambell Street #400 Anchorage, AK 99503 Baker Oil Tools 4730 Business Park Blvd" #44 Anchorage, AK\ 99503 Ciri Land Department PO Box 93330 Anchorage, AK 99503 Ivan Gillian 9649 Musket Bell Cr.#5 Anchorage, AK 99507 Jill Schneider US Geological Survey 4200 University Dr. Anchorage, AK 99508 Gordon Severson 3201 Westmar Cr. Anchorage, AK 99508-4336 Jack Hakkila PO Box 190083 Anchorage, AK 99519 Darwin Waldsmith PO Box 39309 Ninilchick, AK 99639 James Gibbs PO Box 1597 Soldotna, AK 99669 Kenai National Wildlife Refuge Refuge Manager PO Box 2139 Soldotna, AK 99669-2139 Penny Vadla 399 West Riverview Avenue Soldotna, AK 99669-7714 Richard Wagner PO Box 60868 Fairbanks, AK 99706 Cliff Burglin PO Box 70131 Fairbanks, AK 99707 Bernie Karl K&K Recycling Inc. PO Box 58055 Fairbanks, AK 99711 Williams Thomas Arctic Slope Regional Corporation Land Department PO Box 129 Barrow, AK 99723 North Slope Borough PO Box 69 Barrow, AK 99723 ¡JcL I~' [,/0) N I'} ~I (/ \10 4D Put River Sandstone -) ) Subject: AIO 4D Put River Sandstone From: Jody Colombie <jody_colombie@admin.state.ak.us> Date: Fri, 02 Dee 2005 15 :51: 17 -0900 T() :'u1}dìsclÞ~èq~~~¢h)iéH.t~i;,¡ ....":':(', ...,,11::1'1';:: ..', .1,' '.;'. ·':1\.' "."., I iii" lof2 12/2/20053:51 PM \.10 4D Put River Sandstone ) ) 2 of2 12/2/2005 3:51 PM e e STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION 333 West 7th Avenue, Suite 100 Anchorage, Alaska 99501 Re THE APPLICATION OF BP ) EXPLORATION (ALASKA) INC. for ) an order to modify Area Injection ) Order 4C to include the Put River ) Sandstone Member of the Kalubik ) Formation in the authorized injection ) strata for enhanced recovery; and ~ ) ) ) ) ) ) THE PROPOSAL initiated by the Commission to amend underground injection orders to incorporate consistent language addressing the mechanical integrity of wells Area Injection Order 4D Prudhoe Bay Field Prudhoe Oil Pool Put River Oil Pool February 6, 2006 FINAL ORDER ON APPLICATION FOR REHEARING On December 2,2005, the Alaska Oil and Gas Conservation Commission ("Commission") issued Area Injection Order No. 4D in response to an application by BP Exploration (Alaska), Inc. ("BPXA") and the Commission's proposal in this matter. A communication treated by the Commission as an application for rehearing was submitted by Mr. Jerry McCutcheon, objecting to Area Injection Order No. 4D on the ground that "No discussion was provided concerning the benefits of enriched gas injection." By Order dated December 29,2005, the Commission provided an opportunity for Mr. McCutcheon to supplement his application, no later than January 20,2006, with any additional explanation and documentary evidence to demonstrate why Area Injection Order No. 4D is believed to be in error. No supplement was submitted. Operations in the Prudhoe Oil Pool and the Put River Oil Pool are governed not only by area injection orders but also by pool rules established in conservation orders. e e Under Rule 7 of Conservation Order No. 559, waterflood operations are approved for the Put River Oil Pool, but other enhanced recovery operations, including the injection of miscible injectant, are not allowed without further review and approval by the Commission. The Northern Lobe of the Put River Sandstone is included in the Prudhoe Oil Pool, is comprised of gas/gas condensate, and is in pressure communication with the Sadlerochit gas cap. Miscible gas is not planned for the Northern Lobe of the Put River Sandstone or any portion of the Prudhoe Oil Pool gas cap. Additional rules within AIO 4D concerning miscible injection operations are not necessary. Accordingly, the Commission determines that Area Injection Order No. 4D was correctly issued. NOW THEREFORE IT IS ORDERED THAT Area Injection Order No. 4D is reaffirmed. ~ "This is the final order of the Commission in this matter. Any appeal to superior court must be filed within 30 days from the date shown on the below certificate of mailing." I certify that on ' a copy of the above was maile to each of the following at their addresses of record: Jerry McCutcheon BP Exploration (Alaska), Inc. Special Staff Assistant 2 Various Admin Approvals and Final Order 4D e e Subject: Various Admin Approvals and Final Order 4D From: Jody Colombie <jody_colombie@admin.state.ak.us> Date: Mon, 06 Feb 2006 14:03:49 -0900 disclosed- récÍlji~lJ.tê: ; Various Admin Approvals and Final Order 4D e e Content-Type: application/pdf aio4dfinal. pdf Content-Encoding: base64 Content- Type: application/pdf AI05-11.pdf Content-Encoding: base64 Content-Type: application/pdf aio4b-004.pdf . : Content-Encodmg: base64 Content-Type: application/pdf AI05-10.pdf . Content-Encodmg: base64 20f2 2/6/20062:04 PM Mary Jones XTO Energy, Inc. Cartography 810 Houston Street, Ste 2000 Ft. Worth, TX 76102-6298 George Vaught, Jr. PO Box 13557 Denver, CO 80201-3557 John Levorsen 200 North 3rd Street, #1202 Boise, 10 83702 Michael Parks Marple's Business Newsletter 117 West Mercer St, Ste 200 Seattle, WA 98119-3960 Ciri Land Department PO Box 93330 Anchorage, AK 99503 Jill Schneider US Geological Survey 4200 University Dr. Anchorage, AK 99508 Darwin Waldsmith PO Box 39309 Ninilchick, AK 99639 Penny Vadla 399 West Riverview Avenue Soldotna, AK 99669-7714 Bernie Karl K&K Recycling Inc. PO Box 58055 Fairbanks, AK 99711 e David McCaleb IHS Energy Group GEPS 5333 Westheimer, Ste 100 Houston, TX 77056 Jerry Hodgden Hodgden Oil Company 408 18th Street Golden, CO 80401-2433 Kay Munger Munger Oil Information Service, Inc PO Box 45738 Los Angeles, CA 90045-0738 Mark Wedman Halliburton 6900 Arctic Blvd. Anchorage, AK 99502 Baker Oil Tools 4730 Business Park Blvd., #44 Anchorage, AK 99503 Gordon Severson 3201 Westmar Cr. Anchorage, AK 99508-4336 James Gibbs PO Box 1597 Soldotna, AK 99669 Richard Wagner PO Box 60868 Fairbanks, AK 99706 North Slope Borough PO Box 69 Barrow, AK 99723 e Mona Dickens Tesoro Refining and Marketing Co. Supply & Distribution 300 Concord Plaza Drive San Antonio, TX 78216 Richard Neahring NRG Associates President PO Box 1655 Colorado Springs, CO 80901 Samuel Van Vactor Economic Insight Inc. 3004 SW First Ave. Portland, OR 97201 Schlumberger Drilling and Measurements 2525 Gambell Street #400 Anchorage, AK 99503 Ivan Gillian 9649 Musket Bell Cr.#5 Anchorage, AK 99507 Jack Hakkila PO Box 190083 Anchorage, AK 99519 Kenai National Wildlife Refuge Refuge Manager PO Box 2139 Soldotna, AK 99669-2139 Cliff Burglin PO Box 70131 Fairbanks, AK 99707 Williams Thomas Arctic Slope Regional Corporation Land Department PO Box 129 Barrow, AK 99723 \~ ~\~\~l2þ(R #10 . . STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION 333 West 7th Avenue, Suite 100 Anchorage, Alaska 99501 Re THE APPLICATION OF BP EXPLORATION (ALASKA) INC. for an order to modify Area Injection Order 4C to include the Put River Sandstone Member of the Kalubik Formation in the authorized injection strata for enhanced recovery; and ) ) ) ) ) ) ) Prudhoe Bay Field Prudhoe Oil Pool Put River Oil Pool December 29,2005 THE PROPOSAL initiated by the Commission to amend underground injection orders to incorporate consistent language addressing the mechanical integrity of wells ORDER PRELIMINARILY GRANTING REHEARING On December 2,2005, the Alaska Oil and Gas Conservation Commission ("Commission") issued Area Injection Order No. 4D in response to BP Exploration (Alaska), Inc. ("BPXA") application and the Commission's proposal in this matter. On December 21,2005, the Commission received a communication by electronic mail from Mr. Jerry McCutcheon, stating: This is an objection and request for a delay until there is a determination of the benefits of gas injection are available. No discussion was provided concerning the benefits of enriched gas injection. The Commission will treat this communication as an application for rehearing under AS 31.05.080(a) and will allow Mr. McCutcheon to supplement his application with any additional explanation and documentary evidence that he may wish to rely on to demonstrate · Sender: Please print your name, address, an UNITED STATES POSTAL SERVICE iJ{j f (IL__ , ? n ,,:/ ¿¡/ 777"//;,4 II/tfrJ '--)~:)~~ . /)/ )L /0/)/) ()9)J / ,F~' II y'- .) II.!,,'" I,,~ , II I I.tY' II "JI" 1.1, l¡;,t, I, I" \,,, \, I" I \,1\ /)( / /¿:/// / / F/· 1/1//- ¡( I ¡. {/ r- SENDER: COMPLEt~ tHIS s~ct/cJN COMPLETE THIS SECTION oN DJ:LlVERY ~~'III;_.i!I'~_ · Cornplete ¡terns 1, 2, and 3. Also complete item 4 if Restricted Delivery is desired. · Print your narne and address on the reverse so that we can return the card to you. · Attach this card to the back of the mailpiece, or on the front if space permits. 1. Article Addressed to: l~ E ('.~ E: ~ \/ E: [0) jn/'/. j7 }tJ6W1cW? I~·O 1/M1s~2'~~~~'~,~ms'. L) . J'- AnchorflOo ()/r;~ 1)~tJS-/() "3: Service Type " ß.Çertified Mail o Registered o Insured Mail o Express Mail ~eturn Receipt for Merchandise o C.O.D. 4. Restricted Delivery? (Extra Fee) 0 Yes 2. Article Number (Transfer from service label) PS Form 3811 , August 2001 7005 1160 0001 5753 7109 Domestic Return Receipt 102595-02-M-0835 Postage $ M CI Certified Fee CI CI Return Receipt Fee (Endorsement Required) CI Restricted Delivery Fee JI (Endorsement Required) M r-1 Total Postage & Fees U1 CI CI r'- ; i I ~'I , . . why Area Injection Order No. 4D is believed to be in error. The supplement must be filed with the Commission no later than 5:00 pm on January 20, 2006. After reviewing any supplement that Mr. McCutcheon may choose to file, the Commission will determine whether to provide for further proceedings in this matter or to rule on the merits of the application at that time. This order does not stay the effect of Area Injection Order No. 4D. Done at Anchorage, Alaska this 29t Daniel T. Seamount, Commissioner I certify that on December 29,2005, a copy of the above was mailed to each of the following at their addresses of record: .il""'~"""'~ /('(;~:~~ OlL /':....t;.'..\...~... ...... ..... ."fA:..... .. '-^ / ",', '¡ ,. ~~ ;~ '.'\," '" ¡' \ ':. .... . \.,or ,~ . Jerry McCutcheon BP Exploration (Alaska), Inc. " 'y,' ( ~·.t.": 2 #9 . . To John Norman Chairman ALASKA OIL AND GAS CONSERVATION COMMISSION 333 West 7th Avenue, Suite 100 Anchorage, Alaska 99501 john _ norman@admin.state.ak.us From Jerry McCutcheon ftA~~/ ð-.... ~·Ä: ~ÓF c-- Box 101838 / "?( { c. Anchorage, AK 99510 ' Re THE APPLICATION OF BP EXPLORATION (ALASKA) INC. for an order to modify Area Injection Order 4C to include the Put River Sandstone Member of the Kalubik Formation in the authorized injection strata for enhanced recovery; and REC£IVt?D OCf"' 1;;,( .U P.· "0 .~ ~ :¿ ¿â,· Alaska Oil & G iJs Cons C . Anthorag¡ Otnrnl8$ion Area Injection Order 4D Prudhoe Bay Field Prudhoe Oil Pool Put River Oil Pool This is an objection and request for a delay until there is a determination of the benefits of gas injection are available. No discussion was provided concerning the benefits of enriched gas injection. #8 bp ) ) November 3, 2005 BP Exploration (Alaska) Inc, 900 East Benson Boulevard PO. Box 196612 Anchorage, Alaska 99519-6612 (907) 561-5111 Mr. John Norman, Chair Alaska Oil and Gas Conservation Commission 333 Wes(7th Ave, Suite 100 Anchorage, AK 99501 Re: Addendum to Section V "Area Injection Operations" and "Section VI "Proposed Amendment to Prudhoe Oil Pool Rule" of the Application for Amendment of Conservation Order No. 341D for the Prudhoe Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone Dear Chairman Norman: BPXA, as Operator of the Prudhoe Bay Unit, hereby submits an addendum to Section V "Area Injection Operations" and Section VI "Proposed Arriendment to Prudhoe Oil Pool Rule"of the "Application for Amendment of Conservation Order No. 341D for the Prudhoe Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone" dated August 19, 2005. This addendum provides a revised definition for the Prudhoe Oil Pool and a new definition for the Put River Oil Pool. The addendum also provides additional information regarding fluid compatibility as requested by the AOGCC. Sincerely, /J, ¿/ .--.. c.J~ ~..'~ Tim Verseput p Gravity Drainage Team Lead Greater Prudhoe Bay cc: Dan Kruse, ConocoPhillips Alaska, Inc. Sonny Rix, ExxonMobil Jane Williamson, AOGCC Mike Kotowski, DNR ) ) Addendum to Section V "Area Injection Operations" and Section VI "Proposed Amendment to Prudhoe Oil Pool Rule" of the Application for Amendment of Conservation Order No. 341D for the Prudhoe Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone November 3,2005 ) ) November 3, 2005 This addendum to Section V "Area Injection Operations" of the Application for Amendment of Conservation Order No. 341D for the Prudhoe Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone provides additional fluid compatibility information requested by the AOGCC. Compatibility with Formation and Confining Zones The clay petrology of the Southern Lobe of the Put River Sandstone was evaluated in the 2-14 core. The clay content in the Put River Sandstone is largely associated with the finer-grained and poor permeability areas that do not contribute significantly to net pay. A comparison of the Put River clay petrology with other Early Cretaceous reservoirs located on the North Slope indicates similar amounts of the principle clays illite, kaolinite, and mixed layer illite/smectite. Water injection in the analog reservoirs indicates no significant compatibility issues. The Put River also has a glauconite content of 4 - 15%. The higher glauconite content in the Put River Sandstone is not expected to present compatibility issues with the water injection. 2/4 ) ) November 3, 2005 This addendum to Section VI "Proposed_Amendment to Prudhoe Oil Pool Rule" of the Application for Amendment of Conservation Order No. 341D for the Prudhoe Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone provides a revised definition for the Prudhoe Oil Pool and a new definition for the Put River Oil Pool as requested by the AOGCC. Prudhoe Oil Pool Rule 1 Pool Definition (a) The Prudhoe Oil Pool is defined as the accumulations of oil that are common to and which correlate with the accumulations found in the Atlantic Richfield - Humble Prudhoe Bay State No.1 well between the depths of 8,110 feet and 8,680 feet and includes the portion of the Put River Sandstone in pressure communication with the Sag River Formation of the Prudhoe Oil Pool. The Put River Sandstone is that sandstone interval that correlates with the interval 9,638 to 9,719 measured feet on the Borehole Compensated Sonic Log, Run 2, dated September 28, 1975, in the Atlantic Richfield-Exxon NGI No.1 well. (b) The Put River Sandstone shall be included in the Prudhoe Oil Pool within the following area: T12N R14E Section: 35,36 TIIN R14E Sections: 1, 2, II(N/2 and SE/4), 12, 13, 14(E/2), 23(NE/4), 24, 25(N/2) TI1N RiSE Sections: 6,7,8,17,18,19,20, 29(N/2), 30(N/2) Pool Definition for the Put River Oil Pool (a) The Put River Oil Pool is defined as the accumulations of oil and gas in the Put River Sandstone that are in pressure isolation from the Sag River Formation of the Prudhoe Oil Pool. The Put River Sandstone is that sandstone interval that correlates with the interval 9,638 to 9,719 measured feet on the Borehole Compensated Sonic Log, Run 2, dated September 28, 1975, in the Atlantic Richfield-Exxon NGI No.1 well. 3/4 ) ) November 3, 2005 (b) The Put River Sandstone shall be included in the Put River Oil Pool within the following area: TIIN R14E Sections: 3, 4, 9, 10, II(SW/4), 14(W/2), 15, 16, 21, 22, 23(W/2 and SE/4), 25(S/2), 26, 27, 28, 33,34,35,36 TI1NR15E Sections: 29(S/2), 30(S/2), 31, 32 TI0N R14E Sections: 1, 2, 3, 11, 12, 13, 14 TI0N RISE Sections: 5,6,7, 8, 17, 18 4/4 #7 ) ') ) STATE OF ALASKA OIL AND GAS CONSERVATION COMMISSION Amendment of Conservation Order 341D for the Prudhoe Bay Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone NAME - AFFILIATION lO (()2jC ADDRESS/PHONE NUMBER TESTIFY (Yes or No) (pLEASE PRINT) -~ /11/ /JIi £ f ) ££.. \J C¡ yY) e S DeCf n Jet .}\ \?; e.).. if (,í S .- 13 /0 / ~ II let::. d Lt)/) ð c! (.~/- - .j'&. 1-/ - 67 C¡' ~ /\ /6 .-. Ri'::> <i'i? 4 I "!err¡ Pé's-f- Ci y~ 5~' 4 -, 4 ~g Ye 5 ,'"'2 0 3:1 (z?f) _, - IJ( ¡~&SS /ve.iv¡o{':~1 D~, /422 H~¡..)-I~/, í¡< 77~79 Jt6-·7Z!? Yi'.5 ) lie S"s \? IP"lÌt ßf:) 90(? F, f3'ŒgIS\} 0 .s.;bl..f-t-Itt~-~") ~ 0 I 0 /1 J\:e (, "cÍ L ~ ¡(\ I~J r) ( / 'If; 2 6' f-, -+. " v..J<-I (¿ Q C;/ G c.;-Do f fiJc, ~~l\E' ~\Æ:ié'{¡1 RP /371 ,'ßrds Pearl i PcdvvLfr 7~Çy?ó7 36", (J W~ J! ¡ti<AÓ[)",:l{J(~f f Î q 3- /~ 1& /Vn ~u\(E. ~I.~ l:>¡J ~ D ù iC:, d-b9ö'773 Nt) -"-A-tri ~'>O{IJÇ 1\ d--(0C( - a/IT No ~do \¥hf\-\-C 1)zp\-- LR~ (b '~'1'" . / '1'\ #6 ) ) ) 1 ) ) Before Commissioners: ALASKA OIL AND GAS CONSERVATION COMMISSION 2 3 John K. Norman, Chairman Daniel T. Seamount Cathy Foerster :RE:C;E :I.\I!E:D ','("','Ji¡.: '] ,3 4, In the Matter of the Application I of BP Exploration (Alaska), Inc. 5 to Amend Conservation Order No. 341D for the Prudhoe Bay oil Pool 6 and Area Injection Order No. 4C to include the Put River Sandstone 7 8 9 10 11 12 BEFORE: 13 14 15 16 17 18 I ! 19 20 21 22 23 24 25 ALASKA OIL and GAS CONSERVATION COMMISSION Anchorage, Alaska October 6, 2005 9:00 o'clock a.m. VOLUME I PUBLIC HEARING John K. Norman, Chair Daniel T. Seamount, Commissioner Cathy Foerster, Commissioner R & R C 0 U R T R E P 0 R T E R S 810 N STREET 277-0572/Fax 274-8982 1007 WEST THIRD AVENUE 272-7515 ANCHORAGE, ALASKA 99501 ') 10 11 12 13 ) 14 15 16 17 18 19 20 21 22 23 24 25 ) ) 1 TABLE OF CONTENTS 2 opening Remarks by Chair Norman Testimony of James Dean . . Testimony by Jeffrey Pietras . . . 03 . 06/11 . 08/11 3 4 5 6 7 8 I 9! i R & R C 0 U R T R E paR T E R S 810 N STREET 277-0572/Fax 274-8982 1007 WEST THIRD AVENUE 272-7515 ANCHORAGE, ALASKA 99501 ) ) ) 1 PRO C E E DIN G S 2 Tape 1 3 0015 4 (On record - 9:00 a.m.) 5 CHAIR NORMAN: Good morning. This is a Hearing before the 6 Alaska oil and Gas Conservation commission. This is the 7 morning of Thursday, October 6th, 2005. The time is 9:00 8 o'clock a.m. The location is the Commission's offices at 333 9 West Seventh Avenue, Anchorage, Alaska. 10 I'll first introduce the members of the Commission. To my 11 right is commissioner Dan Seamount. To my left is Commissioner 12 Cathy Foerster and my name is John Norman. 13 The commission has a standing policy of compliance with ) 14 the American with Disabilities Act and if there are any persons 15 here who require a special accommodation to participate ·in the 16 Hearing, please, let us know. If you want to hold up your hand 17 or otherwise indicate, a staff member will assist you if that 18 involves hearing or ability to see better or access to the 19 proceedings of the Commission. 20 The proceedings this morning will be recorded and there 21 will be a transcript prepared upon conclusion of the Hearing. 22 A transcript can be obtained by contacting either R & R Court 23 Reporting directly or by contacting the Commission's office and 24 they can arrange for you to obtain a copy. 25 This purpose of this Hearing this morning is to consider ) .f R & Reo U R T R E P 0 R T E R S 810 N STREET 277-0572/Fax 274-8982 1007 WEST THIRD AVENUE 272-7515 ANCHORAGE, ALASKA 99501 3 ) ) ) 1 the application of BP Exploration (Alaska), Inc. to Amend 2 Conservation Order 3410 for the Prudhoe Bay oil Pool and Area 3 Injection Order No. 4C. The purpose of both amendments being 4 to include the Put River Sandstone as part of this pool. 5 I The specific, legal location for the affected area where 6 the Put River Sandstone lies is generally within Township 12 I 7 II north, range 14 east; Township 11 north, range 14 east; 8 Township 11 north, range 15 east and Township 10 north, range 9 14 east, all within the umiat Prime Meridian. 10 The application was filed on August 19th, 2005. 11, Supplement~l information was filed by the Applicant on ! 12 September 13th, 2005. 13 The notice of this Hearing was duly published in the ) 14 Anchorage Daily News on September 1st, 2005. 15 The file does not show any written comments or other 16 documents filed by any other parties. 17 We will proceed this morning with the Hearing in 18 accordance with the Commission's regulations. Generally 19 speaking those are found -- the section in 20 Alaska 20 Administrative Code 25.540. 21 We will hear from the Applicant first and then if there 22 are any other persons who wish to be heard, why, we will take 23 your testimony. The practice of the Commission is to have 24 witnesses sworn before they testify so that they are under 25 Oath. If any persons object to being placed under Oath we will R & Reo U R T R E P 0 R T E R S 810 N STREET 277-0572/Fax 274-8982 1007 WEST THIRD AVENUE 272-7515 ANCHORAGE, ALASKA 99501 4 ) ) ) 1 not require the testimony to be under Oath, but I do instruct 2 all of you that the Commission gives greater weight to 3 testimony that is provided under Oath. 4 Any person who is planning to testify as an expert witness 5 we will ask you first to state your qualifications and your 6 experience and then we will determine whether the Commission 7 will accept you as an expert witness. 8 As a general matter in proceedings like this the 9 Commission does not allow cross examination of witnesses. If 10 any persons are present and you do have questions you think are 11 relevant you may write them out and provide them to the 12 Commission or a staff member and then if the commission finds 13 that they are relevant we will present those questions to the ) 14 applicant. 15 Alternatively if you wish to make a statement to the 16 Commission you may include your questions in your statement and 17 then if the Applicant wishes the opportunity to respond to any 18 of the questions that you pose we will give you the opportunity 19 to do so. 20 I believe we're ready now to proceed, but let me ask 21 first, commissioner Seamount, do you have anything additional that you'd like to say before we start? COMMISSIONER SEAMOUNT: No, I don't. 22 23 24 CHAIR NORMAN: Commissioner Foerster? 25 COMMISSIONER FOERSTER: No. R & R C 0 U R T R E P 0 R T E R S 810 N STREET 277-0572/Fax 274-8982 1007 WEST THIRD AVENUE 272-7515 ANCHORAGE, ALASKA 99501 5 6 ANCHORAGE, ALASKA 99501 1007 WEST THIRD AVENUE 272-7515 810 N STREET 277-0572/Fax 274-8982 R & Reo U R T R E P 0 R T E R S CHAIR NORMAN: And how long have you worked in the area of ) 25 24 ¡: the Put River project. 23 Ii engineer in the state of Texas and I'm the lead engineer for 22!i years of industry experience. I'm a registered professional MR. DEAN: I have a Bachelor of Science Degree in 21 II Petroleum Engineering from Texas A&M Uni versi ty. I have 12 20 19! your educational background and then your work experience? CHAIR NORMAN: Would you, please, then state starting with MR. DEAN: Yes, I will. 18 17 CHAIR NORMAN: And will you be testifying today as an 16 i expert witness? MR. DEAN: I represent BP. CHAIR NORMAN: And who do you represent? MR. DEAN: My name is James Dean. CHAIR NORMAN: Please, state your name? MR. DEAN: I do. 9 (Oath Administered) 8! I'll ask you to raise your right hand. 7 I I'll first ask you to -- so I can administer the Oath, 6 i directed toward the person speaking. Thank you very much. 5 I way the microphones are set up both microphones should be Okay. Commissioner Foerster is explaining to me that the (Side conversation) the microphone? 2 the person representing the Applicant come forward, please, to CHAIR NORMAN: Okay. Then we are ready to proceed. will ) ) 15 14 ) 13 12 11 10 4 3 1 ) 7 ANCHORAGE, ALASKA 99501 1007 WEST THIRD AVENUE 272 - 7515 810 N STREET 277-0572/Fax 274-8982 R & R C 0 U R T R E P 0 R T E R S COMMISSIONER FOERSTER: None (ph). COMMISSIONER SEAMOUNT: None. .~ 25 24 CHAIR NORMAN: All right. I'll ask the Commissioners, is 23 Ii there any objection to accepting Mr. Dean's qualifications? COMMISSIONER FOERSTER: I have no questions (ph). CHAIR NORMAN: Commissioner Foerster. 22 21 20 19:1 have any further questions. Thank you, Mr. Dean. I don't COMMISSIONER SEAMOUNT: San Juan Basin, okay. MR. DEAN: That was in the San Juan Basin. 18 17 COMMISSIONER SEAMOUNT: Was it tight gas in, what, New 16 Mexico or..... 15 shelf and Lower 48 tight gas. MR. DEAN: I worked Gulf of Mexico, both deep water and COMMISSIONER SEAMOUNT: And what areas did you work there? MR. DEAN: Before that in Houston, Texas. 14 ) 13 12 11 10 I you? COMMISSIONER SEAMOUNT: And then before that, where were 8 I so approximately two years. MR. DEAN: I've worked in Alaska since September of 2003, in Alaska? COMMISSIONER SEAMOUNT: Mr. Dean, how long have you worked CHAIR NORMAN: Commissioner Seamount. the Put River. MR. DEAN: I've worked a year and a half in the area of the Put River project, Prudhoe Bay? ) ) 9 7 6 4 51 3 2 1 ) 8 ANCHORAGE, ALASKA 99501 1007 WEST THIRD AVENUE 272-7515 810 N STREET 277-0572/Fax 274-8982 R & R C 0 U R T R E P 0 R T E R S DR. PIETRAS: Okay. I received my Bachelor's of Science 25 24 ii educational background and then your experience? 23 il to please, state your qualifications beginning with your CHAIR NORMAN: Then I'll ask you, just as I asked Mr. Dean 22 DR. PIETRAS: I will. 21 20!i expert witness? CHAIR NORMAN: And will you be offering testimony as an 19 DR. PIETRAS: And it's P-i-e-t-r-a-s. 18 CHAIR NORMAN: And would you spell your last name, please? 17 DR. PIETRAS: My name is Jeffrey T. Pietras. 16 CHAIR NORMAN: Please, state your name? 15 DR. PIETRAS: I do. 14 ') 13 i (Oath Administered) 12, right hand. CHAIR NORMAN: Okay. will you, sir, please raise your 11 MR. DEAN: Okay. 10 9 intermittently then we will swear you both at this time. CHAIR NORMAN: Yes. Yes, if you will be testifying 8 7 in the second witness before we begin? 6 I well. This will be a joint presentation. Do we need to swear 5 get started, we have a second person who will be testifying as MR. DEAN: One question I have for the Commission before I 4 3 proceed. 2 Commission accepts you as an expert witness and you may CHAIR NORMAN: Okay. Then without exception the 1 ) ) ) 9 ANCHORAGE, ALASKA 99501 1007 WEST THIRD AVENUE 272-7515 810 N STREET 277-0572/Fax 274-8982 R & R C 0 U R T R E P 0 R T E R S COMMISSIONER SEAMOUNT: Dr. Pietras, where did you work in CHAIR NORMAN: Urn-hum, okay. Commissioner Seamount. DR. PIETRAS: Projects with different oil companies. 22 three projects? CHAIR NORMAN: That was part of your education, those ) 25 24 23 21 20!1 doing my PhD and Masters. DR. PIETRAS: Those three projects I did concurrent with 18 II Wyoming and Nigeria and then came to Alaska for two years? 17:: your education and then worked for a year in California, CHAIR NORMAN: So is it correct to say that you completed 15 II Nigeria. DR. PIETRAS: I've worked in California and Wyoming and CHAIR NORMAN: And where was the other year? 19 16 14 ) 13 12 II Put River project. DR. PIETRAS: Working Prudhoe Bay fields, as well as the CHAIR NORMAN: Where in Alaska? DR. PIETRAS: Two of those years were here in Alaska. CHAIR NORMAN: Where was that? DR. PIETRAS: Three years of industry experience. 6: experience? .....Geology, also? Okay. And your work CHAIR NORMAN: DR. PIETRAS: Geology. CHAIR NORMAN: And your B.S. was in..... 2 [, from the university of Wisconsin in Madison. from Binghamton University and my Masters and PhD in Geology ) ) 11 10 9 8 7 5 4 3 1 ) 10 ANCHORAGE, ALASKA 99501 1007 WEST THIRD AVENUE 272-7515 810 N STREET 277-0572/Fax 274-8982 R & Reo U R T R E P 0 R T E R S ) 25 proceedings are finished you will remain under Oath. 24: remain under Oath at all times. In fact, until these 23 shift between each other, please, keep in mind that you both 22 and you may now proceed with your presentation. And as you 21 as an expert witness, so you've both been sworn and testified CHAIR NORMAN: All right. We accept your qualifications COMMISSIONER FOERSTER: (Nods in the negative) COMMISSIONER SEAMOUNT: I have no objections. 20 19 18 17 Ii objection to accepting Mr. Pietras as an expert witness? CHAIR NORMAN: Do you either Commissioners have any COMMISSIONER FOERSTER: That's it. DR. PIETRAS: It's near Santa Barbara, California. COMMISSIONER FOERSTER: Okay. 16 15 14 ) 13 12 '( necessarily within a field. DR. PIETRAS: I worked the Sespe Formation, not 11 COMMISSIONER FOERSTER: What fields did you work in 10 Ii California? 9 CHAIR NORMAN: Commissioner Foerster. 7 I questions. Thank you, Doctor. COMMISSIONER SEAMOUNT: Okay. I have no further DR. PIETRAS: Yeah. COMMISSIONER SEAMOUNT: Is it the almond (ph) sand. 3 southwestern Wyoming the Green River Basin. DR. PIETRAS: I worked the Wamsutter field which is in Wyoming? ) ) 8 6 5 4 2 1 ) 10 ) ) 1 And the record should show that both witnesses are nodding 2 their heads that they agree with that statement I made. Please 3 proceed. 4 TESTIMONY BY JAMES DEAN and JEFFREY T. PIETRAS 5 MR. DEAN: This first slide just gives the Commission an 6 overview of what we're going to be presenting in our testimony 7 this morning. Jeff will..... 8 COURT REPORTER: Before we get too far along, do you have 9 a copy of that power point? MR. DEAN: I do not have a hard copy. I have a copy here 11 for myself as reference. 12 13 ) 14 COURT REPORTER: okay. Sorry for the interruption. MR. DEAN: Sure. 15 moment, this will be a preliminary statement that applies to CHAIR NORMAN: In order to keep our -- excuse me for a 16 all testimony, that in order to maintain an orderly record as 17 you're testifying we all need to keep in mind this testimony 18 could possibly be read three or four or 10 years from now. And 19 so if we say, for example, on this slide, we need to be sure 20 that when we are finished with these proceedings it's clear 21 what this slide is. 22 So will you be able to provide as an attachment to this 23 transcript a set of the slides? 24 251 MR. DEAN: Yes, I will. CHAIR NORMAN: And will these be in sequence that you're R & R C 0 U R T R E P 0 R T E R S 810 N STREET 277-0572/Fax 274-8982 1007 WEST THIRD AVENUE 272-7515 ANCHORAGE, ALASKA 99501 11 ) ) 1 going through so..... 2 MR. DEAN: Yes, they will be in sequence. 3 CHAIR NORMAN: I don't see any numbering or anything else, 4 but I believe your description of the slide will be sufficient 5 if they are attached. 6 MR. DEAN: Each title of the slide is unique, so I propose 7 using the slide title to refer to the slides. 8 CHAIR NORMAN: That will be just fine. And do keep in 9 mind, again, that you're not only speaking to us, you're 10 speaking to the future in a transcript and so what we need to 11 make sure is that what is reported on the transcript is clear 12 to a reader in the future. Thank you. 13 MR. DEAN: Okay, thank you. This initial slide gives an ) 14 outline of our testimony this morning for the Put River 15 hearing. Jeff will first cover the geology of the Put River 16 Sandstone, then I will discuss the reservoir appraisal efforts 17 in the Put River. Jeff will then follow up to review the 18 hydrocarbons in place estimates and I will finish our testimony 19 by discussing our development plans in the area injection 20 operations. 21 DR. PIETRAS: The Put River Sandstone is located on 22 Alaska's North Slope within the Prudhoe Bay unit as illustrated 23 on the slide title Put River Sandstone location. 24 The Put River Sandstone overlies the Kingak Shale and 25 'i Sadlerochit Group in the vicinities of Drill site 1, 2, 5, 6, R & R C 0 U R T R E P 0 R T E R S 810 N STREET 277-0572/Fax 274-8982 1007 WEST THIRD AVENUE 272-7515 ANCHORAGE, ALASKA 99501 12 ) ) ) 1 7, 15, 18, NGI and WGI. 2 On the next slide we will show you a type log of the Put 3 River from the NGI-l well. This slide is titled NGI-l Type 4 Log. The Pub River Sandstone is the sandstone interval that 5 correlates with the interval 9,638 feet to 9,719 feet measured 6 depth on the Schlumberger Borehole Compensated Sonic Log Run 2 7 dated September 28th, 1975 in the Atlantic Richfield-Exxon NGI 8 No. 1 well. 9 In this well the Put River Sandstone lies unconformably 10 above the Jurassic Kingak Shale and conformably below the 11 I Cretaceous Highly Radioactive Zone. 12 This map entitled Put River Sandstone Distribution shows 13 the gross sandstone thickness of the Put River Sandstone. As ) 14 you can see the Put River Sandstone composes four laterally 15 extensive sandstone bodies or lobes. They are termed the 16 southern, central, western and northern lobes. I'll point you 17 to those now. The southern lobe, the central lobe, the western 18 lobe and the northern lobe. 19 In the next slide we will look at north to south 20 stratigraphic cross section through these lobes. This slide is 21 entitled Put River Sandstone stratigraphy. The Put River 22 Sandstone along with the Kalubik Formation, mainly shale and 23 siltstone, is part of the Put River interval that lies 24 stratigraphically above the Lower Cretaceous Unconformity and 25 below the Highly Radioactive Zone. ) R & R C 0 U R T R E P 0 R T E R S 810 N STREET 277-0572/Fax 274-8982 1007 WEST THIRD AVENUE 272-7515 ANCHORAGE, ALASKA 99501 13 ) ) ) 1 In the most northeastern extent under the NGIjWGI area the 2 Put River interval lies directly on the Triassic Sag River 3 sandstone. I'll point that to you now. 4 The northern lobe here termed the AB sandstone comprises 5 the entire Put River interval as we saw in the type log NGI-1 6 shown here in the cross section. 7 The remaining three lobes are stratigraphically equivalent 8 to the northern lobe and are interbedded with the Kalubik 9 Formation and those are the central lobe here or excuse me, 10 the southern lobe here, the central lobe and the western lobe. 11 Biostratigraphic age control confirms these correlations. 12 The addition of the Put River Sandstone to the Prudhoe Oil ) 13 pool as defined in Conservation Order No. 341D and Area Injection Order No. 4C is based on the direct juxtaposition of 14 15 the northern extent of the Put River sandstone with the Sag 16 17 18 River sandstone shown again here on the far left. The Sag River sandstone is part of the current Prudhoe oil pool. MR. DEAN: Next we will move onto our appraisal data for 19 the Put River Sandstone. This slide is title the Southern Lobe 20 21 the southern lobe. The appraisal data in the southern lobe Appraisal. It shows you the appraisal data we've collected in 22 consist of core and RFT measurements in well 2-14, two 23 production tests and a downhole fluid sample. 24 In 1980 core was recovered from well 2-14. The core 25!¡ measurements have an average porosity of 19 percent with an [ I !I ) R & Reo U R T R E P 0 R T E R S 810 N STREET 277-0572/Fax 274-8982 1007 WEST THIRD AVENUE 272 - 75 1 5 ANCHORAGE, ALASKA 99501 14 ) ) ) 1 average permeability of 173 millidarcies. An RFT taken in well 2 2-14 in 1980 indicated a reservoir pressure of 4,163 psi. 3 Late last year, 2004, we performed a production test on 4 well 2-23A. That well flowed as a black oil with an average 5 production rate of 1,820 barrels of oil a day and a average gas 6 rate of five million cubic feet per day. A pressure 7 measurement at the end of the production test indicated the 8 current reservoir pressure was 2,710 psi. 9 A second production test was performed in late 2004 on 10 well 1-14 located at the southern end of the southern lobe. 11 That well was unable to flow and we did not receive any 12 production from that well. 13 In the course of evaluating the Put River Sandstone over ) 14 the last year we discovered a casing leak that produced from 15 well 2-27 and that well produced from the leak between 1994 and 16 1997. The estimated volumes from the casing leak were 300,000 17 to 900,000 barrels of oil. 18 A downhole fluid sample was collected in well 2-23 19! following the production test. The fluid properties form the 20 PVT analysis indicated the fluid type was a black oil. The API 21 gravity of the oil was 26.9 degrees API. The reservoir bubble 22 point was 2,815 psi with the formation volume factor of 1.293 23 reservoir barrels per stock tank barrel. 24 Next we will move on to the appraisal data from the 25 central lobe of the Put River and look at the slide titled } R & R C 0 U R T R E P 0 R T E R S 810 N STREET 277-0572/Fax 274-8982 1007 WEST THIRD AVENUE 272-7515 ANCHORAGE, ALASKA 99501 15 ) ) ) 1 Central Lobe Appraisal. Our appraisal data from the central 2 lobe consists of a single production test and a downhole fluid 3 sample. 4 In early 2005 well 15-9 was tested. That well flowed as a 5 black oil with average rates of 240 barrels of oil per day and 6 average gas rates of 120,000 cubic feet per day. The reservoir 7 pressure measurement at the end of the production test was 8 3,923 psi. 9 Following that production test the downhole oil sample was 10 also recovered. The downhole oil sample indicated the 11 formation fluid as a black oil. The API gravity of the oil is 12 31.2 degrees API. The fluid's bubble point is 2,275 psi. The 13 oil's formation volume factor is 1.23 reservoir barrels per ) 14 stock tank barrel. 15 Now we'll move on to the appraisal data from the western 16 lobe of the Put River Sandstone and look at the slide titled 17 Western Lobe Appraisal. Our appraisal data from the western 18 lobe consists of RFT pressure measurements, a single production 19 test and a sidewall core. 20 In 1992 RFT measurements were taken while drilling well 21 15-28. The RFT pressure in the western lobe was 4,234 psi. 22 In early 2005 we performed a production test on well 23 15-41B. That well tested gas with some associated condensate. 24 The average gas rate during the test was 1.8 million cubic feet 25 per day with average condensate rates of 73 barrels of ) R & R C 0 U R T R E P 0 R T E R S 810 N STREET 277-0572/Fax 274-8982 1007 WEST THIRD AVENUE 272-7515 ANCHORAGE, ALASKA 99501 16 ) ) ') 1 condensate per day. The reservoir pressure at the end of the 2 production test is 4,173 psi. 3 Also in 2005 while drilling well 15-14A sidewall cores 4 were recovered in the Put River. Sidewall core measurements 5 have an average porosity of 16 percent with an average 6 permeability of four millidarcies. 7 A surface recombination fluid sample was also collected 8 during the production test of well 15-41B. The fluid 9 properties from that recombined surface sample indicated the 10 reservoir fluid as a gas with some associated condensate. API 11 gravity of the condensate is 57 degrees API. The dew point of 12 the reservoir fluid is 3,435 psi. 13 Finally we'll move on to the appraisal data for the ) 14 northern lobe of the Put River and look at the slide titled 15 Northern Lobe Appraisal. Our appraisal data in the northern 16 lobe consi~ts of core and RFT measurements, a single production 17 test and a recombined surface fluid sample. 18 In 1979 core was recovered from two wells in the northern 19 lobe of the Put River, well NGI-7 and well NGI-13. The average 20 core values were 13 percent porosity with an average 21 permeability of 90 millidarcies. An RFT measurement was also 22 collected in those wells which indicated a reservoir pressure 23 of 4,191 psi. 24 :¡ In early 2005 we performed a production test on well 25 18-27C. That well tested as gas with some associated ) R & Reo U R T R E P 0 R T E R S 810 N STREET 277-0572/Fax 274-8982 1007 WEST THIRD AVENUE 272-7515 ANCHORAGE, ALASKA 99501 17 ) ) ) ) 1 condensate. The average production rates were 6.8 million 2 cubic feet per day with a condensate rate of 165 barrels of 3 condensate per day. Reservoir pressure following that 4 production test was 3,422 psi. 5 Following that production test a surface fluid sample was 6 collected for recombination analysis. That recombination PVT 7 analysis indicated the reservoir fluid is a gas with 8 condensate. The API gravity of the condensate is 59.1 degree 9 API. The reservoir fluid has a dew point of 3,215 psi. 10 The next slide summarizes the reservoir properties for 11 each of the four lobes of the Put River Sandstone. This slide 12 is entitled Put River Sandstone Reservoir Summary. 13 The southern lobe of the Put River contains black oil as 14 the fluid. The initial reservoir pressure was 4,163 psi. The 15 current reservoir pressure is 2,710 psi. 17 black oil. The current reservoir pressure is 3,923 psi. 16 For the central lobe of the Put River the fluid type is a 18 19 gas with associated condensate. The initial reservoir pressure For the western lobe of the Put River the fluid type is 20 was 4,234 psi and the current reservoir pressure is 4,173 psi. 21 For the northern lobe of the Put River the fluid type is a 22 gas with associated condensate. The initial reservoir pressure 23 24 is 4,191 psi and the current reservoir pressure is 3,422 psi. DR. PIETRAS: We'll now move to the slide entitled 25 Hydrocarbons In Place. Volumetric estimates of hydrocarbons in , I~ R & Reo U R T R E P 0 R T E R S 810 N STREET 277-0572/Fax 274-8982 1007 WEST THIRD AVENUE 272-7515 ANCHORAGE, ALASKA 99501 18 ) ) ) 1 place for the Put River Sandstone reflect current well control, 2 stratigraphic and structural interpretation and rock and fluid 3 properties. 4 The average rock properties were estimated using available 5 core data and calibrated petrophysical log models. For the 6 southern and central lobes the average porosity value is 19 7 percent and the average water saturation value is 46 percent. 8 For the western lobe the average porosity value is 19 9 percent and water saturation is 28 percent. 10 The northern lobe was split into a northern half and a 11 southern half based on lithology. The northern half being more 12 conglomeratic. The southern half being a sandstone. Porosity 13 for the northern half -- average porosity is 13 percent and ) 14 water saturation is 13 percent. For the southern half porosity 15 is 17 percent and water saturation is 28 percent. 16 For the estimate of oil in place for the southern lobe the 17 value is 12.6 to 19.2 million barrels of oil with an associated 18 gas volume of 6.9 to 10.5 billion cubic feet. 19 For the central lobe the estimated oil in place is 1.1 to 20 2.7 million barrels of oil with an associated gas volume of 0.5 21 to 1.3 billion cubic feet. 22 The estimated gas in place for the western lobe is 69.6 to 23 104.4 billion cubic feet. And the estimated gas in place of 24 II the northern lobe is 108.4 to 160.4 billion cubic feet. All 25 the oil in place estimates are stock tank barrels and all gas R & Reo U R T R E P 0 R T E R S 810 N STREET 277-0572/Fax 274-8982 1007 WEST THIRD AVENUE 272-7515 ANCHORAGE, ALASKA 99501 19 ) ) ) 1 in place estimates are at standard conditions. 2 MR. DEAN: We will now move on and I will review our 3 development plans and a summary of the area injection 4 operations. The first slide we're going to look at is titled 5 Development Plans. 6 For the southern lobe we are currently evaluating 7 development options with a reservoir simulation. options under 8 consideration are production via primary depletion, water 9 flooding and miscible flooding. 10 For the central lobe development options include primary 11 depletion by recompleting existing wells. 12 For the western lobe plans include potentially one to 13 three production wells. ') 14 For the northern lobe the reservoir fluid is currently 15 above the field marginal GOR and no development is currently 16 planned. 17 We will now look at the area injection operations on the 18 slide entitled Area Injection Operations. The main fluids we 19 are considering for injecting in the Put River Sandstone are 20 produced water, source water from the seawater treatment plant, 21 miscible injectant and stimulation fluids. 22 Fluid compatibility has been evaluated with core and 23 analog data and indicates no significant fluid compatibility 24 problems. 25 Ii The maximum estimated injection rate into the Put River ) R & R C 0 U R T R E P 0 R T E R S 810 N STREET 277-0572/Fax 274-8982 1007 WEST THIRD AVENUE 272-7515 ANCHORAGE, ALASKA 99501 20 ) ) ) ) ) 1 Sandstone would be 25,000 barrels of water per day at a surface 2 pressure of 2,600 psi. 3 For zonal isolation the Put River is bounded below by the 4 Kingak Shale in the southern lobe and above the Put River 5 Sandstone it is bounded by the Kalubik Formation and the HRZ 6 shale. Maximum estimated bottom hole injection pressure from 7 water flood operations is 875 psi below the fracture pressure 8 of the confining and bounding zones. 9 Cement bond logs will be run on all injection wells that 10 will be drilled. Also a report on the mechanical condition of 11 each well within a quarter mile of a proposed injection well 12 will be submitted to the Commission. 13 That completes our formal testimony and presentation at 14 this time. 15 CHAIR NORMAN: Questions, commissioner Seamount? 16 COMMISSIONER SEAMOUNT: Yes. The leak in the well in the 17 southern lobe, I guess I didn't hear you, was that leak through 18 the casing into the production stream? 19 MR. DEAN: That was leaked through a hole in the 20 production casing and a hole in the tubing. 21 COMMISSIONER SEAMOUNT: Okay. 22 MR. DEAN: Both those holes were located below the 23 production packer. 24 COMMISSIONER SEAMOUNT: And so some of the oil in the 25 southern lobe has been produced already, correct? R & R C 0 U R T R E paR T E R S 810 N STREET 277-0572/Fax 274-8982 1007 WEST THIRD AVENUE 272-7515 ANCHORAGE, ALASKA 99501 21 22 ANCHORAGE, ALASKA 99501 1007 WEST THIRD AVENUE 272 - 751 5 810 N STREET 277-0572/Fax 274-8982 R & R C 0 U R T R E paR T E R S DR. PIETRAS: Well, clearly in the northern extent of the 24 this one here it just, kind of, bothers me a little bit? 23!i and stuff so I can see why there's one huge Kuparuk pool, but 22;1 same geologic horizon. The compartments are caused by faulting 21'1 of separate compartments at Kuparuk field, but it's all in the 20 Ii speaking as a geologist, I understand what -- there are a lot 19 il Pietras, would you call this a separate pool or -- I mean, COMMISSIONER SEAMOUNT: How do you feel about that, Dr. 17; implications. split out and called a separate pool what would be the economic implications? I mean, would it matter to BP? MR. DEAN: I don't think there would be any economic 13 I reservoir in the same pool. If it were -- if this were to be 12 II me to lump a lower Cretaceous reservoir with a Triassic 11 I saying that I'm opposed to it, but it seems kind of strange to COMMISSIONER SEAMOUNT: I'm, kind of -- I mean, I'm not MR. DEAN: That is correct. 8 i correct? 7 ii the 12.6 million barrels in place that you estimate, is that COMMISSIONER SEAMOUNT: Okay. So that comes off, what, 5 II 300 to 900,000 barrels produced from the 2-27 casing leak. MR. DEAN: The estimate we presented in our testimony was 3 il much has been produced? COMMISSIONER SEAMOUNT: Do you have an estimate of how MR. DEAN: That is correct. ) ') ), 25 18 16 15 14 ) 10 9 6 4 2 1 ) ) 11 ) ) 1 -- it's in direct communication sitting directly on the Permo- 2 Triassic reservoir, the Sag and the Ivishak and then as you 3 move away from that spot we do have the apparent (ph) 4 compartmental, as you say, that's the stratigraphic 5 correlations, but certainly that northern piece is directly 6 touching with the -- with what's already in the Prudhoe pool. 7 COMMISSIONER SEAMOUNT: Yeah, I can see that reasoning. 8 Well, I can think about it a little bit more. I have no 9 further questions, thank you. 10 CHAIR NORMAN: Commissioner Foerster. 12 both leaks were below the production packer. Do you above the COMMISSIONER FOERSTER: Mr. Dean, I heard you say that ) 13 production packer? 14 15 MR. DEAN: No, they were below the production packer. 16 sketch of what that would look like? I'm having a hard time COMMISSIONER FOERSTER: Could you draw me a wellbore 17 seeing that. 18 19 20 MR. DEAN: (Witness complies). COMMISSIONER FOERSTER: Okay. So an upward packer? MR. DEAN: Well 2-27 was a selective completion, completed 21 in both zone 1 in the Ivishak Formation and zone 2 in the 22 Ivishak Formation. Zone 2 is isolated from the zone 1 23 preparations with strattle (ph) packer assembly. The Put River 24 leak occurred below the upper production packer and allowed 25 fluids to flow through the production casing and through a hole R & R C 0 U R T R E paR T E R S 810 N STREET 277-0572/Fax 274-8982 1007 WEST THIRD AVENUE 272-7515 ANCHORAGE, ALASKA 99501 23 ) ) ) 1 in the production tube. 2 COMMISSIONER FOERSTER: Thank you. 3 CHAIR NORMAN: Could you -- on that -- there was a leak in 4 the production -- in the casing and in the tubing, is that 5 right, ..... 6 MR. DEAN: That is correct. 7 CHAIR NORMAN: .....two leaks? Okay. Commissioner 8 Foerster. 9 COMMISSIONER FOERSTER: This question doesn't stem from 10 any of your testimony, but it stems from some information that 11 you provided to our technical Staff. What are you pressure 12 monitoring plans for your completion? Do you have those? 13 MR. DEAN: We have not formalized our plans for pressure ) 14 surveillance. Our plan is once we complete the reservoir 15 simulation and determine our development plan, we will at that 16 point decide the pressure surveillance strategy. 17 COMMISSIONER FOERSTER: If these wells are put into the 18 Prudhoe Bay pool, is there an existing rule for pressure 19 management? 20 MR. DEAN: I'm not familiar with what the current rule is 21 for the Prudhoe Bay pressure surveillance. 22 COMMISSIONER FOERSTER: But there likely is one and as a 23 default if we -- if we put this into the Prudhoe pool you would 24 have those? 25 MR. DEAN: Yeah, that's correct. ) R & Reo U R T R E paR T E R S 810 N STREET 277-0572/Fax 274-8982 1007 WEST THIRD AVENUE 272-7515 ANCHORAGE, ALASKA 99501 24 25 ANCHORAGE, ALASKA 99501 1007 WEST THIRD AVENUE 272-7515 810 N STREET 277-0572/Fax 274-8982 R & R C 0 U R T R E P 0 R T E R S do we have what we would expect, a natural separation of gas and is this -- do we have at the higher elevation a gas cap and behave like a pool? I see different gravities and pressures Now, with that in mind, that generally in mind, does this the term poo 1. separated from any other zone in the structure is covered by And then each zone of a general structure which is completely or appearing to contain a common accumulation of oil or gas. most other states, pool is an underground reservoir containing -- under our Alaska law definition pool, which is similar to question so that you know what I'm looking at I'll just briefly just to frame this CHAIR NORMAN: Okay. And the DR. PIETRAS: To my knowledge. elsewhere to your knowledge? CHAIR NORMAN: And the Put River Sandstone is absent River Sandstone. you the full extent that we know of at this time of the Put DR. PIETRAS: Based on my mapping of the area we've shown this general area? Sandstone. Where else is the Put River Sandstone present in this, we see the four lobes of occurrence of the Put River commissioner Seamount was inquiring about. Well, let me ask CHAIR NORMAN: Dr. Pietras, I wanted to follow up on what MR. DEAN: Yes. COMMISSIONER FOERSTER: As a minimum? \ \ J .J 1 2 3 4 5 6 7 8 9 10 11 12 13 14 ') 15 16 17 18 19 20 21 22 23 24 25 26 ANCHORAGE, ALASKA 99501 1007 WEST THIRD AVENUE 272-7515 810 N STREET 277-0572/Fax 274-8982 R & R C 0 U R T R E P 0 R T E R S MR. DEAN: The main difference in the development plan if 25 24 il separate pools? 23!! differ if we put these into Prudhoe pool versus if we made them COMMISSIONER FOERSTER: How would your development plans 22 CHAIR NORMAN: Thank you. Commissioner Foerster. 21 20 il interval called the Put River Sandstone. 19 ii each other. However, they are within the same stratigraphic 18 11 lobe and the southern lobe are stratigraphically isolated from 17 I Sandstone, the northern lobe, the central lobe and the western 16 I of the Sag River. Each of the four lobes in thePÙt River 15 I with the current Prudhoe pool. The direct juxtaposition on top MR. DEAN: The northern lobe is in hydraulic communication 14 ) 13 pressure in a lobe affect the other lobes? 12 I production and release of pressure in one lobe or inducement of CHAIR NORMAN: Well, would -- to what extent would 11 10 II directly since we do not see that. 9 oil/water contact in any of these lobes so I can't answer that 8! there is or where it would be a contact between gas or oil or a DR. PIETRAS: We don't have any data that shows us if 7 CHAIR NORMAN: That's what I'm asking, yeah. 6 5 you're asking, is that correct? 4 like, a gas/oil contact or a oil/water contact, if that's what DR. PIETRAS: okay. As far as a common occurrence of a, 3 2' all of the lobes? and condensate and oil that would occur in a pool as between 1 ) ) ) ) ) ) 1 they were separate pools or isolated pools would be a gas lift 2 I scenario if you were to commingle Ivishak production and use 3 that to gas lift the Put River fluids. 4 COMMISSIONER FOERSTER: Could you not apply for a 5 commingling permit? 61 I 7 MR. DEAN: Yes, you could. COMMISSIONER FOERSTER: Okay. So given that opportunity 8 there would be no difference in developmenting a scenario other 9 than some paperwork? 10 MR. DEAN: Not that I'm aware of currently. 11 CHAIR NORMAN: Yes, on the slide that's still present 12 there, the slide entitled Area Injection Operations, third from 13 the bottom, maximum estimated bottomhole injection pressure 875 ) 14 psig below frac (ph) pressure in bounding zones, what does the 15 bounding zone consist of here? It's I think in here, but I'm 16 just trying to refresh my recollection. What is the bounding 17 zone that could be fractured at that pressure? 18 MR. DEAN: Lower bounding zone is the Kingak Shale. The 19 upper bounding zone consists of the Kalubik Formation and HRZ 20 Shale. 21 CHAIR NORMAN: Anything else? I believe -- will there be 22 any other witnesses to testify for the applicant, BP 23 Exploration of Alaska? 24 MR. DEAN: No, there will not. 25 CHAIR NORMAN: All right. Then at this point we will R & Reo U R T R E P 0 R T E R S 810 N STREET 277-0572/Fax 274-8982 1007 WEST THIRD AVENUE 272-7515 ANCHORAGE, ALASKA 99501 27 28 ANCHORAGE, ALASKA 99501 1007 WEST THIRD AVENUE 272-7515 810 N STREET 277-0572/Fax 274-8982 R & Reo U R T R E P 0 R T E R S ) 25;! and see if there is any additional information that we would 24 ii Commissioners have taken a brief break to reviewed our notes CHAIR NORMAN: We're back on the record now. The 23 22 ¡i (On record - 10: 08 a. m. ) 21 i (Off record - 9:45 a.m.) 20 i We'll take a 10 minute recess. 19 i think, we'll be ready to adjourn the hearing. 18 return to the microphone and if there are no questions then, I 17! If we have any final questions then we'll ask you to 16 i come back on the record. 15 I I think that's proven to be the most efficient way and we'll there and we will try to see if there are any final questions. 14 ) 13 I immediately to the right and there are restroom facilities out 12 I recess and during that period there is coffee outside 11 I At this point then we will take approximately a 10 minute 10 lone else asking to be recognized. Okay. The Chair is looking through and the Chair sees no 9 8 I offer testimony to the Commission on this matter? 7 i And so I will now ask are there any other persons who wish to CHAIR NORMAN: Okay. Both witnesses indicate they do. 6 DR. PIETRAS: Yes, I do. 5 MR. DEAN: Yes, I do. 4 3 I you would be under Oath. Do you both understand that? again, that as you remain and if we would have to recall you, 11 2 ) excuse you. I would ask if you could remain and reminding you, ,) ) 29 ANCHORAGE, ALASKA 99501 1007 WEST THIRD AVENUE 272-7515 810 N STREET 277-0572/Fax 274-8982 ) R & R C 0 U R T R E P 0 R T E R S 25 24 2 3 II 152 0 22 II (Recessed - 10: 10 a.m.) 21! adjourned at 10:10 a.m. Thank you. CHAIR NORMAN: Okay. Then without objection we'll stand 20 COMMISSIONER FOERSTER: I don't have anything to add. 19 CHAIR NORMAN: Commissioner Foerster. 18 17 days or weeks. 16 giving us some interesting issues to mull over in the next few applicant for coming in and giving such a good presentation and 15 ') COMMISSIONER SEAMOUNT: Well, I'd just like to thank the 14 13 you have anything final to say? CHAIR NORMAN: Very good. And, Commissioner Seamount, do 12 this time. 10 I IIi No, we have no further information to submit at MR. DEAN: 9 could do so now? 8 this opportunity. If you have anything to say about that you 7 support that is already in the record, but I would give you 6 Area Injection Order and I think there's -- the information to 5 part of this application there also is a request to amend the 4 The one question that I would like to ask you is that as 3 necessarily review that here. It's very understandable. attached to the application and so we don't feel the need to 2 ) 1 require as part of the record. There is all of the information ') ) ) 10 11 12 I 13 ) 14 I 15 16 17 18 19 20 21 22 23 24 25 ,) ) ) .1 1 C E R T I F I CAT E 2 UNITED STATES OF AMERICA ) ) ss. 3 STATE OF ALASKA ) 4 I, Rebecca Nelms, Notary Public in and for the State of Alaska, residing at Anchorage, Alaska, and Reporter for R & R Court Reporters, Inc., do hereby certify: 5 6 THAT the annexed and foregoing Public Hearing In the Matter of the Application of BP Exploration (Alaska), Inc. to Amend Conservation Order No. 341D for the Prudhoe Bay Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone was taken by Suzan Olson on the 6th day of October, 2005, commencing at the hour of 9:00 a.m., at the Alaska oil and Gas Conservation commission, Anchorage, Alaska; 7 8 9 THAT this Hearing Transcript, as heretofore annexed, is a true and correct transcription of the proceedings taken and transcribed by Suzan Olson; IN WITNESS WHEREOF, I have hereunto set my hand and affixed my seal this 10th day of october, 2005. ,......-:t.f',' ' \ '~...q " ,"" '........1'X..;1~_.~ L". ('___ (\.(-,~.,-\,,~ Notary Public in and for Alaska My Commission Expires: 10/10/06 R & R C 0 U R T R E P 0 R T E R S 810 N STREET 277-0572/Fax 274-8982 1007 WEST THIRD AVENUE 272-7515 ANCHORAGE, ALASKA 99501 30 ) ) Put River Sandstone AOGCC Hearing October 6, 2005 ¡Vir. James A. Dean, PE Dr. Jeffrey T. Pieta'as, PhD Put River Sandstone Location _=.,"__~,&I".._,_~."..""'_--'l:."----:_.~,_"-"-~.__...,.":o.._-'IiI----';'''I. , . \) .J . . 'N .' I I ::~.,....>. ....-' . '~_tl];J~- ~\~.. .~ '.. - . . m 'U. '~, ~ ~ Å :0,' ª . , '~~ : .. :... ~, 'It- .'~t. '1,... _ .- PBU' . "j¢ , _I .------ ~¡ ~ ~ ~ ¡rÇ. -~. -.. : u.. ,õ.n ~,___.,__ _ - _.,."_ ._ .. ... _..:::' .':' .. _..' _..__ Obp Obp '-"--"~1 L.-.,. i,I:: . ~ ~ ' . ,- 1 ,,- j). ..oI! is, ¡... t._ - r.,.' ~. Put River Sandstone Distribution 0 bp 'j&. ..j ··i ! ø ) Updated by ru I I f ! q.' ¡n i I l.. ) Outline I. Geology 2. Resel'Voir Appraisal 3. Hydrocal'bons in Place 4. Development Plans & Area Injection Opel'ations NGI-Ol Type Log I :::(~='~l "J:'!" I ~·····FI'·' 1~?·",·::T'1 ~Cl ----.. < I i~,J.lI. I'--T:::-"~~I,,- 04/14/03 Obp Obp N WG¡.o4 NQI.o7 NGI·Q1 Put River Sandstone Strati~~~,~,~Y 0 bp S 2·1'" 2·23 ~ r····..··..·...··.:....,·, 'JI- 11--, ..-,~--- II ..- 1 ) ) Obp Southern Lobe Appraisal _~rr-'~' ~ ~j I ~ë~~:IC.d:: 300 ·900 moo 1..11 " "I z·~t'·'1 ~20 bopd, ~ mmcfd) ii' (1994-1997) I .'::'·"'JI)lia.Prc..~ I ' " I :Y ,A ~~,. .. Z.14; 'y9 ..' ·No fiow 1,1980""" 1"".~o.IIy,l73mD I / ,~:.~" ·1980 RFT: 4163 pS11 . "'~.: ~~ ~ ~~~;~;:~~~7:;~;':oI"II""" Western Lobe Appraisal 0 bp t~'~~'~~j I..· 'CC'î~~~~';'\~:" :;d~;t:..;: API ,,'. -Dew Pt:34JS 'Psi. ) I i ':',),~', "', ," ~) , ..~"~ liP ~~~::;';~~ ~;:~:~rl .1m",,, Put River Ss Reservoir Summary 0 bp Sourhun Lobe CtnrMlI Lobe WC51ern Lobe- !':orthtrn Labc Fluid Tyl)(' Bloc" Oil BIRCJ..:Oil Cins Condcns:lt«: Gu~ Corcc1cns:nc Initiol R~l"'Voir Prcssurt' 4163 pSIJ. 42.34 pSID ~191 p~\:¡ Cllrrent R~cl"'\'oir PrcssurC' :!110 'P!>13 3923 \)5ia 4173 PSIõ\ H~2 p~jl\ ( ~;;;;~:~~;:;:n.-.... ) Updated by ) Central Lobe Appraisal ··~""""t\,:.'''''1'~·1 ""',~ IIS.09A: . Oil (24~ bopd. 120 mefd) . 3923 p.I" pr¡:u.ur~ /\ ',¿¡ ";'~...::::_~ 'ø' Northern Lobe Appraisal 1i1w.¡ P",...rti.. -Cas c:ondenutc -API Cr,.....lty: 59.10 API -Delw Pt: 3215 PlI. ,., ~) ..! ~. ~":....\Jk' !Ø' Hydrocarbons In Place SHlld~tone I Paras;\)' w-a~;Š~~·,~;l Southern ! 19% .:46% I CelHral 19%1 -Hi%1 I I Western 19%1 28% i :-¡orthern (lIorth) 13% 13% 1 Northern (south) 17%= :!g%~ "/rIll.!: 'Jf:I'I\-'~drroUl tit/: .~~\aucis{(Jnl!. 'dcl'l\'t:dli'om !.:or/.! dolO unci CCJl1/pfJflSOI/.\' to ,hI! 8 ÿnd A': JandstlJlIC's. 11m - 1101 1I/I..'(J511I'ed. 04/14/03 Obp 12" i ..¡ I .~r~~:;~;~~~ ~~:;~;:rl rlrrtr,,., lobe i ESlimAitt Oil in PIRre . ESlimated G", in Place I Soulhern' 12,6 - 19.2 MMBO 6.9 - 10.5 BCF C<"lml I I - 2,7 ,¡'''IBO 0.5 - I 3 BCF I WeSler. Northern I 69.6- 104.-1 BCF I08A-160ABCF Obp ! ~':E::.:;·,:..~:~' ,..~"! ¡ . I I·· I ~~~:~~~~~~;;;;;~.I d,,",m Obp .VU/(,:: AI/ ot/ In plt.Jcc c.Wmaf~.'Þ tin.: /11 HOC/< /allk hbl:l awl ,,1/ gas In place; l'.'uunafCS "'T af ~to"Jard condìllOlIS. 1\/3 2 ) ) Development Plans Southern Lobe Evaluating development options with reservoir simulation - Primary depletion, water-flood, misciblo flood Central Lohe · Options include primary depletion by recomplcting existing wells Western Lobe · Plans include potentially 1 to 3 production wells Northern Lobe · Above mnrginal GOR, no develo(lment currently planned ) } Updated by ) 04/14/03 Obp Area Injection Operations Obp 1) Main fluids considered for injection: produced wuter, source water trom Seawater Treatment PIJ.nt. miscible injectant, stimulation t1uids 2) Fluid compatibility: Core and analog dala indieatc no signineanl problems 3) Maximum estimated injection rates/pressures: 25,000 bwpd @ 2600 psig 4) Zonal Isolation: . Put River bounded by Kingak Shale and Kalubik 1'0rmalionlHRZ Shale . Maximum estimated bottom-hole injection pressure is 875 psig below fracture pressure in bounding zønes - Cement bond logs will be run on mjection wells - Report on mechanical condition of each well williin If. mtlc ofinjcction wells 3 ) ) ') PUBLIC HEARING 10/06/05 Page 3 t.o Page 30 PREPARED BY: R & R COURT REPORTERS, INC. 810 "N" Street Suire 101 Anchorage, AK 99501 Phone: 907-277-0572 ) ') ) 1 ALASKA OIL AND GAS CONSERVATION COMMISSION ) 2 Before Commissioners: John K. Norman, Chairman Daniel T. Seamount Cathy Foerster 3 4 In the Matter of the Application of BP Exploration (Alaska), Inc. 5 to Amend Conservation Order No. 341D for the Prudhoe Bay oil Pool 6 and Area Injection Order No. 4C to include the Put River Sandstone 7 8 ALASKA OIL and GAS CONSERVATION COMMISSION Anchorage, Alaska 9 10 October 6, 2005 9:00 o'clock a.m. 111 I 12 VOLUME I PUBLIC HEARING BEFORE: John K. Norman, Chair Daniel T. Seamount, Commissioner Cathy Foerster, Commissioner 13 I 14 ) 15 I I 16 I 17 18 19 20 21 22 23 24 25 R & R C 0 U R T R E P 0 R T E R S 810 N STREET 277-0572/Fax 274-8982 1007 WEST THIRD AVENUE 272-7515 ANCHORAGE, ALASKA 99501 ) 10 11 12 13 ) 14 15 I 161 17 18 I 19 20 21 22 23 24 25 ) ) '} I 1 TABLE OF CONTENTS 2 opening Remarks by Chair Norman . Testimony of James Dean . Testimony by Jeffrey Pietras 03 06/11 08/11 3 4 5 6 7 8 9 R & R C 0 U R T R E P 0 R T E R S 810 N STREET 277-0572/Fax 274-8982 1007 WEST THIRD AVENUE 272-7515 ANCHORAGE, ALASKA 99501 #5 bp ) } September 30,2005 BP Exploration (Alaska) Inc, 900 East Benson Boulevard PO, Box 196612 Anchorage, Alaska 99519-6612 (907) 561-5111 i''''';~~ :'''''''' l'~ 'E' '·n I,' E' "'" ::,C"'~ :k,; r¡ '.M { , '1 \.. ., ;; j',\ ,. ",...¡ìi. :It., , r.- Mr. John Norman, Chair Alaska Oil and Gas Conservation Commission 333 West 7th Ave, Suite 100 Anchorage, AK 99501 (JCT iì ;\J' ,I, 10 j~~1P4$ik ,:] g1 . ' ....¡tt\;, G~il1irnS5$~(¡]\rr Re: Addendum to Section II "Reservoir Description and Development Planning" of the Application for Amendment of Conservation Order No. 341D for the Prudhoe Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone Dear Chairman Norman: BPXA, as Operator of the Prudhoe Bay Unit, hereby submits an addendum to Section II "Reservoir Description and Development Planning" of the "Application for Amendment of Conservation Order No. 341D for the Prudhoe Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone" dated August 19, 2005. This addendum provides additional reservoir engineering data to support the estimated hydrocarbons in place. Sincerely, d~¿J,-/~ Tim Verseput Gravity Drainage Team Lead Greater Prudhoe Bay cc: Dan Kruse, ConocoPhillips Alaska, Inc. Sonny Rix, ExxonMobil Jane Williamson, AOGCC Mike Kotowski, DNR ) ) Addendum to Section II "Reservoir Description and Development Planning" of the Application for Amendment of Conservation Order No. 341D for the Prudhoe Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone September 30, 2005 ) ) Addendum to Section II "Reservoir Uescription and Development Planning" of the Applicatiorllor Sept. 30, 2005 Amendment of Conservation Order No. 3410 for the Prudhoe Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone This addendum to Section II "Reservoir Description and Development Planning" of the Application for Amendment of Conservation Order"No. 341D for the Prudhoe Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone provides additional reservoir information as requested by the AOGCC. Hydrocarbons in Place The estimates of hydrocarbons in place for the Put River Sandstone were calculated volumetrically using the information presented in the "Rock and Fluid Properties" discussion in Section II of the Application for Amendment of Conservation Order No. 341D for the Prudhoe Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone dated August 19, 2005. Southern Lobe Material Balance A material balance estimate using the 2-23A production test (250 mbo) and the estimated volumes from the 2-27 casing leak (300 - 900 mbo) validated the volumetric hydrocarbon in place estimate of 12.6 - 19.2 MBO for the Southern lobe of the Put River Sandstone. 2/2 bp ,) ) September 13, 2005 BP Exploration (Alaska) Inc. 900 East Benson Boulevard PO, Box 196612 Anchorage, Alaska 99519-6612 (907) 561-5111 Mr. John Norman, Chair Alaska Oil and Gas Conservation Commission 333 West 7th Ave, Suite 100 Anchorage, AK 99501 N~ iE:, - .(' :L~: ,j) iY,E''''''1O ,['-~.it~ r'\~", L__ 'I V I', i ':~,'=D '1 ';~ v :c;. ; .:l:L,) ,[,) G i~:J.a;~ l,Un::,).. A (~~ hu'Í@ if) .¡¡~ Re: Addendum to Section V "Area Injection Operations" of the Application for Amendment of Conservation Order No. 341D for the Prudhoe Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone Dear Chairman Norman: BPXA, as Operator of the Prudhoe Bay Unit, hereby subm.its an addendum to Section V "Area Injection Operations" of the "Application for Amendment of Conservation Order No. 341D for the Prudhoe Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone" dated August 19, 2005. This addendum addresses the information regarding fluid injection into the Put River Sandstone in accordance with 20 AAC 25.402 (Enhanced Recovery Operations) and 20 AAC 25.460 (Area Injection Orders). Sincerely, ~~I!~ Tim Verseput Gravity Drainage Team Lead Greater Prudhoe Bay cc: Dan Kruse, ConocoPhillips Alaska, Inc. Sonny Rix, ExxonMobil Jane Williamson, AOGCC Mike Kotowski, DNR ) ') Addendum to Section V "Area Injection Operations" of the Application for Amendment of Conservation Order No. 341D for the Prudhoe Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone September 13, 2005 ') ) Addendum to Section V "Area Injection Operations" of the Application for Amendment of Conservation Sept. 13, 2005 Order No. 341D for the Prudhoe Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone v. Area Injection Operations BP Exploration (Alaska) Inc., in its capacity as Prudhoe Bay Unit Operator, has requested that the Commission amend the authorized strata for the Prudhoe Oil Pool in Area Injection Order Number 4C to include the Put River Sandstone. This addendum addresses the information regarding fluid injection into the Put Ri ver Sandstone in accordance with 20 AAC 25.402 (Enhanced Recovery Operations) and 20 AAC 25.460 (Area Injection Orders). rlat of Project Area 20 AAC 25 .402( c)( 1) A plat showing the location of each proposed injection well, abandoned or other unused well, and production well within one-quarter mile of each proposed injection well will be provided to the Commission with each application for a Permit to Drill or Application for Sundry Approval for any injection wells. Specific approvals for any new injection wells or existing wells to be converted to injection service will be obtained pursuant to 20 AAC 25.005 and 25.507, or any applicable successor regulation. Operators/Surface Owners 20 AAC 25.402(c)(2) and 20 AAC 25.402(c)(3) BP Exploration (Alaska) Inc. is the operator of the Prudhoe Bay Oil Pool. Pursuant to 20 AAC 25.402(c)(3), an affidavit showing that the Operators and Surface Owners within a one-quarter mile radius of each proposed well have been provided a copy of the application will be provided to the Commission with each application for a Permit to Drill or Application for Sundry Approval for any injection wells. 2/8 ) ) Addendum to Section V "Area Injection Operations" of the Application for Amendment of Conservation Order No. 341D for the Prudhoe Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone Sept. 13, 2005 Description of Operation 20 AAC 25.402(c)(4) Development plans are described in Section II of the "Application for Amendment of the Conservation Order No. 341D for the Prudhoe Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone". Drill pad facilities and operations are described in Section III. Geolo2ic Information 20 AAC 25.402(c)(6) The Geology of the Put River Sandstone is described in Section I of the "Application for Amendment of the Conservation Order No. 341D for the Prudhoe Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone". Injection Well Casin2 Information 20 AAC 25.402(c)(8) The casing program for any injection wells will be permitted and completed in accordance with 20 AAC 25.030. Proposed completion diagrams will be provided to the Commission with each application for a Permit to Drill or Application for Sundry Approval for any injection well. Cement bond logs will be run on all injection wells to demonstrate isolation of injected fluids to the Put River Sandstone. 3/8 \ J ) Addendum to Section V "Area Injection Operations" of the Application for Amendment of Conservation Order No. 341D for the Prudhoe Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone Sept. 13,2005 Injection Fluids 20 AAC 25.402(c)(9) Type of Fluid/Source Fluids to be considered for injection in the Put River Sandstone are: a. Produced water from Prudhoe Bay Unit production facilities for the purposes of pressure maintenance and enhanced recovery; b. Source water from the Seawater Treatment Plant; c. Fluids injected for purposes of stimulation per 20 AAC 24.280 (2), consistent with other North Slope field practices; d. Tracer survey fluid to monitor reservoir performance, consistent with other North Slope field practices; e. Miscible injectant. Source water from the Seawater Treatment Plant would be the primary water source for Put River Sandstone injection. 4/8 ) ) Addendum to Section V "Area Injection Operations" of the Application for Amendment of Conservation Order No. 341D for the Prudhoe Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone Composition Sept. 13, 2005 The composition of the source water from the Seawater Treatment Plant is listed in the table below. Species Barium Bicarbonate Calcium Chloride Iron Magnesium Potassium Sodium Strontium Sulfate pH TDS Maximum Injected Rate o - 3 ppm 100 - 200 ppm 200 - 400 ppm 10,000 - 19,000 ppm o - 3 ppm 600 - 1,300 ppm 5,000 - 10,500 pplll 4 - 8 pplll 1,400 - 2,800 pplTI 6.8 - 6.9 17,000 - 34,000 pplll Maximum water injection requirement for the Put Ri ver Sandstone is estimated at 25,000 BWPD. Compatibility with Formation and Confining Zones Core-based mineralogy data and analog comparisons indicate no significant problems with clay swelling or compatibility with in-situ fluids are expected. Analysis of the 02- 14 core indicates relatively low clay content (6-35% by volume) in the Put River Sandstone, primarily in the form of illite. Petrographic analysis indicates that clay 5/8 ) ) Addendum to Section V "Area Injection Operations" of the Application for Amendment of Conservation Order No. 341D for the Prudhoe Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone Sept. 13, 2005 volumes in the better quality sand sections (>50 md) are in the range of 6 - 10%. Clay volumes increase to approximately 18% in rock with penneabilities in the range of 10 - 50 md. Below 1 md, clay volumes range up to 35%. Most of the identified clay is present as intergranular matrix, having been intermixed with the sand through burrowing. The average clay composition is a mixture of roughly equal amounts of kaolinite, illite and mixed layer illite/smectite. No chlorite was reported during petrographic analysis. No significant compatibility issues are anticipated between the formation and injected fluid. The presence of iron-bearing minerals suggests that the use of strong acids should be avoided in breakdown treatments, spacers, etc. Iniection Pressures 20 AAC 25.402(c)(l0) The expected average surface water injection pressure for the Put River Sandstone is 1800 psig. The estimated maximum surface injection pressure is 2600 psig with a resulting maximum bottom hole injection pressure of 5950 psig. Fracture Information 20 AAC 25.402(c)(ll) The Put Ri ver Sandstone is bound by the Kingak Shale below and Kalubik Formation and HRZ shale above. In the Southern lobe where injection is being evaluated, 150-200 feet of Kingak Shale separates the Put River Sandstone from the underlying Sag River Sandstone. The Kingak Shale has a calculated fracture pressure of 6875 psia based on the dipole sonic log in well 15-14A. The Kalubik Formation directly overlies the Put 6/8 ). ) Addendum to Section V "Area Injection Operations" of the Application for Amendment of Conservation Sept. 13,2005 Order No. 341D for the Prudhoe Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone River Sandstone, and is 80 -100 feet thick. The HRZ shale overlies the Kalubik Formation and is 180-200 feet thick with a calculated fracture pressure of 6825 psia based on the dipole sonic log in well 15-14A. These units separate the Put River Sandstone from shallower stray sands of the Colville Mudstone. Based on the bounding shale thicknesses and fracture pressures, the expected maximum injection pressure for the potential Put River Sandstone injection would not initiate or propagate fractures through the confining strata, and, therefore, would not allow injection or formation fluid to enter any freshwater strata. The closest known freshwater-bearing sands are over 6000 vertical feet above the Put Ri ver interval. H vdrocarbon Recovery and Depletion Plan 20 AAC 25.402(c)(l4) Estimated Put River Sandstone hydrocarbons in place are discussed in Section II of the "Application for Amendment of the Conservation Order No. 341D for the Prudhoe Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone". Material balance calculations for the Southern lobe of the Put Ri ver Sandstone indicate that primary depletion would recover approximately 10% of the estimated stock tank original oil in place. Early screening of analog reservoirs indicates likely total recovery from waterflooding to be approximately 20% - 35% of the oil in place (incremental 10% - 25% improvement relative to primary depletion) with estimated peak production rates of 3000 - 9000 bopd and a production life of 5 years. A reservoIr simulation study to evaluate the waterflood options IS scheduled for completion by January 2006. Development of the Southern lobe is currently envisioned 7/8 ') } ) Addendum to Section V "Area Injection Operations" of the Application for Amendment of Conservation Order No. 3410 for the Prudhoe Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone Sept. 13, 2005 to include one to five production wells with one to five injection wells. The injection wells would be drilled from existing pads and utilize the current seawater distribution system at DS # 1. Offtake from the Put Ri ver Sandstone will be managed to balance voidage replacement. Mechanical Condition of Offset Wells 20 AAC 25.402(c)(15) A report on the mechanical condition of each well that has penetrated the Put Ri ver Sandstone within one-quarter mile radius of a proposed injection well will be provided to the Commission with each application for a Permit to Drill or Application for Sundry Approval for any injection wells. 8/8 #4 STATE OF ALASKA NOTICE TO PUBLISHER ) ADVERTISING ORDER NO. ADVERTISING ORDER SEE BOTTOM FOR INVOICE ADDRESS INVOICE MUST BE IN TRIPLICATE SHOWING ADVERTISING ORDER NO., CERTIFIED AFFIDAVIT OF PUBLICATION (PART 2 OF THIS FORM) WITH ATIACHED COpy OF ADVERTISEMENT MUST BE SUBMITIED WITH INVOICE AO-02614007 F AOGCC R 333 W 7th Ave, Ste 100 o Anchorage, AK 99501 M AGENCY CONTACT DATE OF A.O. Jody Colombie PHONE August 31, 2005 PCN (907) 793 -1 ),).1 DATES ADVERTISEMENT REQUIRED: ~ Anchorage Daily News PO Box 149001 Anchorage, AK 99514 September 1, 2005 THE MATERIAL BETWEEN THE DOUBLE LINES MUST BE PRINTED IN ITS ENTIRETY ON THE DATES SHOWN. SPECIAL INSTRUCTIONS: Type of Advertisement X Legal D Display Advertisement to be published was e-mailed D Classified DOther (Specify) SEE ATTACHED SEND INVOICE IN TRIPLICATE AOGCC, 333 W. 7th Ave., Suite 100 TO A nchoraQ'e. A K 99~O 1 NUMBER AMOUNT DATE TOTAL OF PAGE 1 OF ALL PAGES$ 2 PAGES COMMENTS REF TYPE 1 VEN 2 ARD 3 4 ~IN 4MnllNT 1 2 02910 ~v rr Df:M Ir 4r.r.T ~v NMR DIST LlQ 05 02140100 73451 DIVISION APPROVAL: ) ) Notice of Public Hearing STATE OF ALASKA Alaska Oil and Gas Conservation Commission Re: Prudhoe Bay Field Prudhoe Oil Pool Application to amend Conservation Order 341 D and Area Injection Order 4C to include the Put River Sandstone within the Prudhoe Oil Pool By application dated August 19, 2005, BP Exploration (Alaska) Inc, as Unit Operator of the Prudhoe Bay Unit requested the Commission to amend Conservation Order 341D and Area Injection Order 4C to expand the definition of the Prudhoe Oil Pool to include the Put River Sandstone lying within the current areal boundaries of the Prudhoe Bay Oil Pool and to authorize underground injection into the additional defined interval. The Put River Sandstone correlates with the interval 9,638 to 9,719 measured feet on the Borehole Compensated Sonic Log, Run 2, dated September 28, 1975, in the Atlantic Richfield-Exxon NGI No.1 well. The known hydrocarbon bearing portions of the Put River Sandstone lie within T12N-R14E, TI1N-R14, TI1N-RI5E, and TI0N- R 14 E, Umiat Meridian, The Commission has tentatively scheduled a public hearing on this application for October 6, 2005 at 9:00 am at the offices of the Alaska Oil and Gas Conservation Commission at 333 West th Avenue, Suite 100, Anchorage, Alaska 99501. A person may request that the tentatively scheduled hearing be held by filing a written request with the Commission no later than 4:30 pm on September 16,2005. If a request for a hearing is not timely filed, the Commission may consider the issuance of an order without a hearing. To learn if the Commission will hold the public hearing, please call 793-1221 after September 20, 2005. In addition, a person may submit a written protest or written comments regardin~ this application to the Alaska Oil and Gas Conservation Commission at 333 West t Avenue, Suite 100, Anchorage, Alaska 99501. Protests and comments must be received no later than 4:30 pm on October 3, 2005 except that if the Commission decides to hold a public hearing, protests or comments must be received no later than the conclusion of the October 6,2005 hearing. If you are a person with a disab' 'ty, who may need special accommodations in order to comment or to a75t~nd the g . aring, please contact the Commission's Special Assistant Jodyrom Ie t ,- ~ Jor.~. "Wo ya' Published Date: 9/1/05 AO: 02614007 ------ ) Anchorage Daily News Affidavit of Publication 1001 Northway Drive, Anchorage, AK 99508 ) 9Yl/2dØS PRICE OTHER OTHER OTHER OTHER OTHER GRAND AD# DATE PO ACCOUNT PER DAY CHARGES CHARGES #2 CHARGES #3 CHARGES #4 CHARGES #5 TOTAL 591152 09/01/2005 02614007 STOF0330 $212,80 $212.80 $0.00 $0.00 $0.00 $0.00 $0.00 $212.80 STATE OF ALASKA THIRD JUDICIAL DISTRICT Kimberly Kirby, being first duly sworn on oath deposes and says that she is an advertising representative of the Anchorage Daily News, a daily newspaper. That said newspaper has been approved by the Third Judicial Court, Anchorage, Alaska, and it now and has been published in the English language continually as a daily newspaper in Anchorage, Alaska, and it is now and during all said time was printed in an office maintained at the aforesaid place of publication of said newspaper. That the annexed is a copy of an advertisement as it was published in regular issues (and not in supplemental form) of said newspaper on the above dates and that such newspaper was regularly distributed to its subscribers during all of said period. That the full amount of the fee charged for the foregoing publication is not in excess of the rate charged private individuals. Signed l ;f /i,//. .' i ~~~:~:{ ('/? ) <:1 'I ¡ ¡"Î , / / ~~/ //,-l., /~" ,/ .. /^ (-,....'~; i) ,Ii //,1 l/¡y' ( I .', 1:/ , I >~ i,./ Subscribed and sworn to me before this date: f.£J Þ p ~s Notary Public in and for the State of Alaska. Third Division. Anchorage, Alaska MY COMMISSION EXPIRES: l.o hlcu1 (-:£0 ~-+';d ^ JI. O· d # : -. '1~--J~' y~ \\\{(({((ff/¡: \.\'- :-{ \-\. 8ft/, 1",...." ,\...(~ . . . . . . ."( ~ '- rÙ" ...... . ~..... ~~:~OTA¿~}:.QS ~ . ~ ca=-o . ~ ::: PUBL\C ~ -'?',n . co...., -::::2 . \I~ ... .. .. ..&' . .& ...., -::.. c . . ~ ^" 9>"".' . v ~ ~....o~ . .~OF ~\...~. <O'Y ./..,., ~s : '. . . . ~~'\'\ ////10/1 E,'(pire~' \ \'\ }J}})])}})) Notice of Public Hearing STATE OF ALASKA Alaska Oil and Gas Conservation Commission Re:PrudhoeBay Field Prudhoe ,Oil Pool Application to amend Conservation Order 341 D and Area Iniection Order4C to include the Put River Sandstone within, the Prudhoe Oil Pool By application dated August 1119, 2005, and re· ceived ,by the Alaska Oil,and Gas Conservation Commission ("Commission") that same day, BP I Exploration (Alaska) I nc,{BpXAJin Its cap'cic:ity as Unit Operator of the Prudhoe Bayu.rit("PBU") . requested the Commission to, amend Conseryation P;èd~~f~~¡Ro~~~ ~;ee~~~~~~~0~\?tg~rt1,c¡~~1 ~d~~~~ Put River Sandstone hting within the current are.al ' boundaries of the Prudhoe ,Bay Oil Pool and to au· ' thorize Ünde~groundiÌ1 iec:tion. into the additional defined interval.The Put River Sandstone corre- lates with the inter,val 9,638 to 9,719 mea!;u,redf,eet on th",Bo~el'¡ole ComDen"'Jt.;d Sonic, Log, Run 2, a 0 I .. d :..; D I '" m t.." r .' & I? ' S, in the A t I an tic ,P,ct".ela·E'pon NGI No i Nt-II. The known hy- IJrt)ca~bon Ot'onr,.;! Dorl.or,> 01 the,P,ut River Sand- ,ror..,. I,t' ,Jltdnll1 T l}fj,R IJE T IIN-R14,·T11N-R15E, (Jr.,:! Th)f',,," IJE Um.OI M",r,a.on. The Commission has tentatively scheduled a pub· lichearing on this application for October 6, 2005 at 9:00am at the offices oflhe Alaska9Hand Gas Conservation Commission at 333 West 7th Avenue, Suite 1 00, Anchorage, Alaska 99501. A person may request that the tentatively scheduled hearing be held by filing a written request with the Commis- sion no later.than 4:30 pm on September 16, 2005. If a request for a hearing is not timely filed, the Commission may consider the issuance of an or- der without a hearing. To learnifthe Commission wi U hold the public hearing, please call .793-1221 af· ter September 20,,2005. I n addition, a person may submit a written protest or written comments regarding this application to the Alaska Oil and Gas Conservation ,Commission at 333 West 7th Avenue, Suite 100, Anchorage, Alaska 99501. Written Protests and comments must be received no later than 4:30 pm on October 3, 2005 except that if the Commission decides to hold a public hearing, written protests or com- ments must be received no later fhan at the con- clusion of the October 6, 2005 hearing. I f yOU are a person with a disability who may need speciàl accommodationss in order to comment or to attend the public ·hearing, please contact the Commission's Special Assistant Jody Colombie at 793·1221. John K. Norman Chairman AO: 02614007 Published Date: 911/05 t"UOIIC [,'once ) Subject: Public Notice From: Jody Colombie <jody _ colombie@admin.state.ak.us> Date: Wed, 31 Aug 2005 10:58:52 -0800 To: Legal Ads Anchorage Daily News <legalads@adn.com> Please publish tomorrow. Jody Colombie Content-Type: application/msword :Ad Order form.doc I Content-Encoding: base64 Content-Type: application/msword Put Public Notice.doc Content-Encoding: base64 1 of 1 8/31/2005 11 :28 AN Ke: t"UDl1C l\JOtICe ') ) Subject: Re: Public Notice From: "Ads, Legal" <legalads@adn.com> Date: Wed, 31 Aug 2005 15 :36:22 -0800 To: lady Colombie <jody _ colombie@admin.state.ak.us> Hello Jody: BE SURE TO CHECK OUT THE LEGAL NOTICES ON-LINE. WE RECENTLY CREATED NEW LEGAL SECTIONS ON-LINE ESPECIALLY FOR THE STATE OF ALASKA. WE ARE OFFERING A 9.0 DAY FREE TRIAL ON ALL LEGAL ADVERTISING AS OF MAY 9TH TO PROMOTE OUR NEW ON-LINE, USER FRIENDLY CATEGORY'S. PLEASE TAKE THIS TIME TO TRACK YOUR CUSTOMERS AND SEE IF ON-LINE ADVERTISING IS RIGHT FOR YOU. Following is the confirmation information on your legal notice. Please review and let me know if you have any questions or need additional information. Account Number: STOF .033.0 Legal Ad Number: 591152 Publication Date(s): September 1, 2.0.05 Your Reference or PO#: .02614.0.07 Cost of Legal Notice: $212.8.0 Additional Charges: Web Link: E-Mail Link: Bolding: Total Cost To Place Legal Notice: $212.8.0 Your Legal Notice Will Appear On The Web :~w~_~~~~.s:o~..:., xxx x Your Legal Notice Will Not Appear On The Web www.adn.com: Thank You, Kim Kirby Anchorage Daily News Legal Classified Representative E-Mail: _legalads@adn.:.S:.9-.~ Phone: (9.07) 257-4296 Fax: (9.07) 279-817.0 On 8/31/.05 1.0:58 AM, "Jody Colombie" <jody co::'ornbie@admin.state.ak.lJs> wrote: Please p~blish tomorrow. Jody Colombie 1 of I 911/2005 11: 12 At\. 02-902 (Rev, 3/94) Publishe ')nal Copies: Department Fiscal, Departm yceiving AO,FRM STATE OF ALASKA ADVERTISING ORDER SEE BOTTOM FOR INVOICE ADDRESS NOTICE TO PUBLISHER ADVERTISING ORDER NO. INVOICE MUST BE IN TRIPLICATE SHOWING ADVERTISING ORDER NO" CERTIFIED AFFIDAVIT OF PUBLICATION (PART 2 OF THIS FORM) WITH ATTACHED COPY OF ADVERTISEMENT MUST BE SUBMITTED WITH INVOICE AO-02614007 F R o M AOGCC 333 West ih Avenue. Suite 100 Anr.hnf::¡ap AK QQ,,() 1 907-793-1221 AGENCY CONTACT DATEOF~Q lodv Colombie Aup"ust 31. 7005 PHONE PCN (907) 793 -1 ??1 DATES ADVERTISEMENT REQUIRED: T o Anchorage Daily News PO Box 149001 Anchorage, AK 99514 September 1, 2005 THE MATERIAL BETWEEN THE DOUBLE LINES MUST BE PRINTED IN ITS ENTIRETY ON THE DATES SHOWN. SPECIAL INSTRUCTIONS: United states of America AFFIDAVIT OF PUBLICATION REMINDER State of ss INVOICE MUST BE IN TRIPLICATE AND MUST REFERENCE THE ADVERTISING ORDER NUMBER. A CERTIFIED COpy OF THIS AFFIDAVIT OF PUBLICATION MUST BE SUBMITIED WITH THE INVOICE. ATTACH PROOF OF PUBLICATION HERE. division. 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 of Published at in said division and state of and that the advertisement, of which the annexed is a true copy, was published in said publication on the day of 2005, and thereafter for _ consecutive days, the last publication appearing on the _ day of , 2005, and that the rate charged thereon is not in excess of the rate charged private individuals. Subscribed and sworn to before me This _ day of 2005, Notary public for state of My commission expires 02-90 I (Rev, 3/94) AO,FRIv{ ruulI\... l'1Ull\...C; rlUUlIUC; DåY rll;;IU rUl C\..IVI;;[ ') ) Subject: Public Notice Prudhoe Bay Field Put River From: Jody Colombie <jody _colombie@admin.state.ak.us> Date: Wed, 31 Aug 2005 11: 18: 16 -0800 To: undisclosed-recipients:; t'UOIIC l'\lOtlCe t'rual1oe fjay t' lelQ Put Klver ) Content-Type: application/pdf Put Public Notice.pdf Content-Encoding: base64 20f2 8/31/2005 11:28 AM Citgo Petroleum Corporation PO Box 3758 Tulsa, OK 74136 Mona Dickens Tesoro Refining and Marketing Co, Supply & Distribution 300 Concord Plaza Drive San Antonio, TX 78216 Jerry Hodgden Hodgden Oil Company 408 18th Street Golden, CO 80401-2433 Kay Munger Munger Oil Information Service, Inc PO Box 45738 Los Angeles, CA 90045-0738 Mark Wedman Halliburton 6900 Arctic Blvd, Anchorage, AK 99502 Ciri Land Department PO Box 93330 Anchorage, AK 99503 Jill Schneider US Geological Survey 4200 University Dr, Anchorage, AK 99508 Darwin Waldsmith PO Box 39309 Ninilchick, AK 99639 Penny Vadla 399 West Riverview Avenue SOldotna, AK 99669-7714 Bernie Karl K&K Recycling Inc, PO Box 58055 Fairbanks, AK 99711 \ , Mary Jones XTO Energy, Inc, Cartography 810 Houston Street, Ste 2000 Ft, Worth, TX 76102-6298 Robert Gravely 7681 South Kit Carson Drive Littleton, CO 80122 Richard Neahring NRG Associates President PO Box 1655 Colorado Springs, CO 80901 Samuel Van Vactor Economic Insight Inc, 3004 SW First Ave, Portland, OR 97201 Schlumberger Drilling and Measurements 2525 Gambell Street #400 Anchorage, AK 99503 Baker Oil Tools 4730 Business Park Blvd" #44 Anchorage, AK 99503 Gordon Severson 3201 Westmar Cr. Anchorage, AK 99508-4336 James Gibbs PO Box 1597 Soldotna, AK 99669 Richard Wagner PO Box 60868 Fairbanks, AK 99706 Williams Thomas Arctic Slope Regional Corporation Land Department PO Box 129 Barrow, AK 99723 ) David McCaleb IHS Energy Group GEPS 5333 Westheimer, Ste 100 Houston, TX 77056 George Vaught, Jr, PO Box 13557 Denver, CO 80201-3557 John Levorsen 200 North 3rd Street, #1202 Boise, ID 83702 Michael Parks Marple's Business Newsletter 117 West Mercer St, Ste 200 Seattle, WA 98119-3960 David Cusato 200 West 34th PMB 411 Anchorage, AK 99503 Ivan Gillian 9649 Musket Bell Cr,#5 Anchorage, AK 99507 Jack Hakkila PO Box 190083 Anchorage, AK 99519 Kenai National Wildlife Refuge Refuge Manager PO Box 2139 Soldotna, AK 99669-2139 Cliff Burglin PO Box 70131 Fairbanks, AK 99707 North Slope Borough PO Box 69 Barrow, AK 99723 , ~ fJY \f\~~. .Of¡ #3 Fwd: Notice of Public Hearing] ) ) Subject: [Fwd: Notice of Public Hearing] From: Jane Williamson <jane_ williamson@admin.state.ak.us> Date: Mon, 29 Aug 2005 14:21:47 -0800 To: Jody J Colombie <jody _colombie@admin.state.ak.us> Jody, This was the notice that BP had asked us to hold. They've cleared it with me to notice. Jane -------- Original Message -------- Subject: Notice of Public Hearing Date: Mon, 22 Aug 2005 14:17:05 -0800 From: Jane Williamson <jane williamson@admin.state.ak.us> Organization: State of Alaska To: Jody J Colombie <j ody colombie@admin. s tate. ak. us> Revised with John's changes. Jane Williamson, PE <:jane willimTIson@admin.state.ak.us> Reservoir Engineer Alaska Oil and Gas Conservation Commission Content-Type: application/msword Put Public Notice.doc Content-Encoding: base64 1 of 1 8/29/2005 5 :07 PM {E: Amendment of Prudhoe pool rules and AlO t")d Put River San... ) Subject: RE: Amendment of Prudhoe pool rules and AIO to add Put River Sandstone From: "Dean, James A" <deanja@bp.com> Date: Mon, 29 Aug 2005 14:40:51 -0800 To: Jane Williamson <jane_ williamson@admin.state.ak.us>, "Senden, Leslie B" <SendenLB@bp.com> CC: Robert P Crandall <bob_crandall@admin.state.ak.us>, Winton GAubert <winton _ aubert@admin.state.ak.us>, Cathy P Foerster <cathy _ foerster@admin.state.ak.us> , John Nonnan <john_norman@admin.state.ak.us>, Dan T Seamount <dan_seamount@admin.state.ak.us>, Jody J Colombie <jody_colombie@admin.state.ak.us> Jane, As we discussed this afternoon, please proceed with the public notice for hearing, We plan to submit an Addendum to Section V "Area Injection Operations" that will address the requirements in 20 AAC 25.402 and provide more information about the depletion plan and benefits of water injection. I expect to submit that Addendum to you late next week after partners have reviewed the document. --James From: Jane Williamson (mailto:jane_williamson@admin.state.ak.us] Sent: Tuesday, August 23, 2005 9:58 AM To: Dean, James A; Senden, Leslie B Cc: Robert P Crandall; Winton G Aubert; Cathy P Foerster; John Norman; Dan T Seamount; Jody J Colombie Subject: Amendment of Prudhoe pool rules and AIO to add Put River Sandstone James and Leslie, As we've discussed by phone, there are a few items which must be addressed in your application prior to approval of amendment of Area Injection Order 4C to allow injection into the Put River sandstone. Specifically you will need to address the information requirements as laid out in 20 MC 25.402(b). Information requirements include such things as evidence that the fluid injection will not initiate or propagate fractures through the confining zones, evidence of fluid compatibility of the injectant with the formation and reservoir fluids, and information concerning incremental recovery with injection of water (or MI if appropriate). A more thorough discussion of the depletion plan and benefits of water injection is needed for both amendment of the Pool Rules and the Area Injection Order. It is recognized that you have not yet identified wells for water injection. The analysis of well integrity may wait until you supply a sundry for completion of injectors, Per your request, we will hold off on publishing the notice for hearing until you get back to the Commission, Jane 1 of 1 8/29/2005 5:07 PlV mendment of Prudhoe pool rules and AIO to ark] o.,)t River Sandstone ) Subject: Amendment of Prudhoe pool rules and AIO to add Put River Sandstone From: Jane Williamson <jane_williamson@admin.state.ak.us> Date: Tue, 23 Aug 2005 09:58:09 -0800 To: James Dean <deanja@bp.com>, I1Senden, Leslie B" <SendenLB@BP.com> cc: Robert P Crandall <bob_crandall@admin.state.ak.us>, Winton GAubert <winton _ aubert@admin.state.ak.us>, Cathy P Foerster <cathy _foerster@admin.state.ak.us> , John Nonnan <john_nonnan@admin.state.ak.us>, Dan T Seamount <dan_seamount@admin.state.ak.us>, Jody J Colombie <jody _colombie@admin.state.ak.us> James and Leslie, As we've discussed by phone, there are a few items which must be addressed in your application prior to approval of amendment of Area Injection Order 4C to allow injection into the Put River sandstone, Specifically you will need to address the information requirements as laid out in 20 MC 25.402(b), Information requirements include such things as evidence that the fluid injection will not initiate or propagate fractures through the confining zones, evidence of fluid compatibility of the injectant with the formation and reservoir fluids, and information concerning incremental recovery with injection of water (or MI if appropriate). A more thorough discussion of the depletion plan and benefits of water injection is needed for both amendment of the Pool Rules and the Area Injection Order. It is recognized that you have not yet identified wells for water injection. The analysis of well integrity may wait until you supply a sundry for completion of injectors, Per your request, we will hold off on publishing the notice for hearing until you get back to the Commission, Jane Jane Williamson, PE <jane williaIl1S0n(~adrnin.state.ak.us> Reservoir Engineer Alaska Oil and Gas Conservation Commission I of I 8/23/2005 2:06 PlV #2 bp ) August 19,2005 BP Exploration (Alaska) Inc. 900 East Benson Boulevard P.O. Box 196612 Anchorage, Alaska 99519-6612 (907) 561-5111 Mr. John Norman, Chair Alaska Oil and Gas Conservation Commission 333 West 7th Ave, Suite 100 Anchorage, AK 99501 Re: Application for Amendment of Conservation Order No. 341D for the Prudhoe Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone Dear Chairman Norman: BPXA, as Operator of the Prudhoe Bay Unit, hereby submits an application to expand the existing Prudhoe Oil Pool and Area Injection Order to include the Put River Sandstone. Since the northern lobe of the Put River Sandstone is in hydraulic communication with the Sag River Sandstone which is part of the current Prudhoe Oil Pool, expansion of the Prudhoe Oil Pool is appropriate for this small-scale development. If you have any questions about the application, please contact James Dean (564-4668) or Leslie Senden (564-5488). Sincerely, .....-. ÎL---. ---- . t 251~"~ V ~~, ,,-ý' Tim Verseput ) Gravity Drainage Team Lead Greater Prudhoe Bay cc: Dan Kruse, ConocoPhillips Alaska, rnc, Sonny Rix, ExxonMobil Jane Williamson, AOGCC Mike Kotowski, DNR ,110 ) ) Application for Amendment of Conservation Order No. 341D for the Prudhoe Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone August 19, 2005 ) ) Prudhoe Oil Pool Rules & Area Injection Order No. 4C Amendment Application Aug. 19, 2005 Table of Contents I. Geology. ................. ............ ............. ....... ........ .............................. ... ..................... 3 Introduction..................................................................................................................... 3 Stratigraphy..................................................................................................................... 3 Lithology/Depositional Environment .................... ............ .................. ............ ............... 5 Put River Sandstone Structure ... .... .... ... ........ ....................... ............ ....... ... ... ... ........... .... 6 Pool Limits...................................................................................................................... 7 II. Reservoir Description and Development Planning ........................................8 Rock and Fluid Properties............................................................................................... 8 Hydrocarbons in Place.................................................................................................. 12 Reservoir Performance.................................................................................................. 12 Development Planning.................................................................................................. 13 Development Options ................................................................................................... 14 Development Plan......................................................................................................... 14 Reservoir Management Strategy................................................................................... 15 III. Facilities ......... ...... ........ .......... ........... .... ... .......... .................. ................... ...... ..16 General Overview.. ..... ........ .......... ................ ........... ....... ......... ..... .............. ....... ..... ...... 16 Drill Pads and Roads..................................................................................................... 16 Pad Facilities and Operations........................................................................................ 16 Flow Stations .............. ........ ............... ............. ..... ..... .............. .................. .................... 16 IV . Well Operations..............................................................................................17 Drilling and Well Design.............................................................................................. 17 Reservoir Surveillance Program ....... ........... ..................... ...... ......... ......... .................... 18 V. Area Injection Operations .............................................................................19 VI. Proposed Amendment to Prudhoe Oil Pool Rule........................................20 VII. Proposed Amendment to Area Injection Order No. 4C ...........................21 VIII. List of Exhibits ............................................................................................22 2/44 ,'\ ') Prudhoe Oil Pool Rules & Area injection Order No. 4C Amendment Application Aug. 19, 2005 I. Geology Introduction The Put River Sandstone is located on Alaska's North Slope within the Prudhoe Bay Unit, as illustrated in Exhibit 1-1. It overlies the Kingak Shale and Sadlerochit Group in the vicinity of Drill Sites 1,2,5,6,7,15,18, NGI, and WGI. The Put River Sandstone is the sandstone interval that correlates with the interval 9,638 to 9,719 feet measured depth on the Schlumberger Borehole Compensated Sonic Log Run 2 dated September 28, 1975, in the Atlantic Richfield-Exxon NGI No.1 Well (API 50-029-20171). The Put River Sandstone, along with the Kalubik Formation (shale and siltstone), is part of the Put River interval that lies stratigraphically above the Lower Cretaceous Unconformity (LCU) and below the Highly Radioactive Zone (HRZ) (Exhibit 1-2). The Prudhoe Bay Owners propose including the Put River Sandstone in the Prudhoe Oil Pool Rules and the Area Injection Order for the Eastern Operating Area. The addition of the Put River Sandstone is based on the direct juxtaposition of the northern extent of the Put River Sandstone with the Sag River Sandstone which is part of the current Prudhoe Oil Pool. The proposed amendments to the Prudhoe Oil Pool Rules and Area Injection Order are intended to encompass any area within the Prudhoe Bay Unit with Put River Sandstone. The Put River Sandstone was included as part of the Prudhoe Bay (Permo-Triassic) Reservoir in the Prudhoe Bay Unit Agreement and was evaluated with core and RFf measurements in wells NGI-7, NGI-13, NGI-14, WGI-04, and 02-14 from 1978 - 1980. In the early 1990's, RFT measurements were also collected in wells 15-28 and 15-47. The Put River Sandstone was perforated and tested in wells 02-23A, 1-14, 15-41B, 15- 09A, and 18-27C in 2004 and 2005. Wells 02-23A and 15-09A confirmed black oil accumulations and wells 15-41B and 18-27C produced gas condensate. Stratigraphy The Put River Sandstone was deposited in the Early Cretaceous geologic time period, between 100 and 130 million years before present. Exhibit 1-2 shows a portion of the open-hole wireline logs from the Richfield-Exxon NGI No.1 Well (API 50-029-20171). 3/44 ) Prudhoe Oil Pool Rules & Area ìDJection Order No. 4C Amendment Application ) Aug. 19, 2005 This type log illustrates the stratigraphic definition of the Put River Sandstone. The log is scaled in measured depth (MD) and also has a true vertical depth subsea (TVDss) track. In the NGI No. 1 well the base of the Put River Sandstone occurs at 9,719'MD (-8076'TVDss) and the top occurs at 9,638' MD (-8011 'TVDss). Elsewhere the Put River Sandstone is interbedded with shales and siltstones of the Kalubik Formation. Together, the Put River Sandstone and Kalubik Formation make up the Put River interval. The Put River interval lies unconformably above Jurassic and older strata and conformably below the Cretaceous Highly Radioactive Zone (HRZ). The Lower Cretaceous Unconformity (LCU) is the basal unconformity of the Put River interval. The LCU is evidenced by a distinct change in lithofacies, angular discordance with underlying strata, and in palynological and micopaleontological assemblages (Exhibit 1-3). In its southern extent, the Put River interval overlies the Jurassic Kingak Shale. In the most northeastern extent, under the NGI/WGI area, the Put River interval lies directly on the Triassic Sag River Sandstone. The sediments deposited in the Put River interval were locally derived from an exposed highland to the northeast and represent an overall marine transgression following uplift and erosion. Four vertically significant and laterally extensive sandstone bodies (or lobes) have been correlated within the Put River interval. They are termed the Southern, Central, Western, and Northern lobes of the Put River Sandstone (Exhibit 1-4). The Northern lobe comprises the entire Put River interval, as shown in the type log of NGI-01 (Exhibit 1-2). The remaining three lobes are stratigraphically equivalent to the Northern lobe and are interbedded with the Kalubik Formation (Exhibit 1-3). Biostratigraphic age control confirms these correlations. The locus of deposition for each sandstone lobe was controlled by the interplay of erosional and structural paleotopography formed along the LCU, and sediment dispersal. There appears to have been two main pulses of sandstone deposition within the Put River interval. The first is recorded by the A2 and A4 sandstones. The A2 sandstone lies directly on the LCU and is thickest in the south. The Southern lobe of the Put River Sandstone is entirely composed of the A2 sandstone where it is up to 41 feet thick. Sediment accumulation was constrained by erosional paleotopography into the Kingak 4/44 ) ') Prudhoe Oil Pool Rules & Area Injection Order No. 4C Amendment Application Aug. 19, 2005 Shale. The A4 sandstone is separated from the A2 sandstone by a thin shale/siltstone layer. The A4 sandstone is thickest within the Midfield Graben (up to 22 feet thick), and presumably filled remnant structurally-controlled paleotopography. The Central lobe of the Put River Sandstone is entirely composed of the A4 sandstone. Following deposition of the A sandstones, marine transgression limited the supply of coarse-grained sediment. Many wells contain a layer with an anomalously high gamma-ray log signature in this interval (Exhibit 1-5). The B sandstone overlies this thin transgressive package representing the second pulse of coarse-grained deposition. It is up to 75 feet thick, and comprises the Western lobe of the Put River Sandstone. To the south the distal portion of the B sandstone correlates to thin sandstone/siltstone beds. The Northern lobe of the Put River Sandstone is composed of both the A and B sandstones. The transgressive unit separating the two is not well- developed in this area, presumably due to proximity of the clastic source. Thus the B sandstone typic all y lies direct! y on the A sandstone in the N orthem lobe, forming one composite sandstone body that is up to 69 feet thick. Lithology/Depositional Environment Southern lobe The entire A2 sandstone was cored in well 02-14 (Exhibit 1-6). Here the sandstone is a medium-grained, moderately-to well-sorted chert-lithic arenite with localized pebble layers. The detrital mineralogy is predominantly quartz and chert; with minor amounts of feldspar and fine-grained lithic fragments. Glauconite occurs as disseminated and granular accumulations in concentrations of up to 15%. Clay content is largely associated with the finer-grained and poorly-sorted intervals; it is not pervasive through the matrix. Beds generally fine upward and bioturbation is common. Visible porosity ranges from 10-20% with little pervasive cementation. Quartz overgrowths occur on most grains, with quartz cement best developed in well-sorted sandstone beds. Siderite cement occurs locally mostly near the top and base of the A2 sandstone. The A2 sandstone is interpreted as a lower shoreface deposit. An abundant assemblage of trace fossils, sedimentary structures, and glauconite content support this interpretation. 5/44 ) ) Prudhoe Oil Pool Rules & Area Injection Order No. 4C Amendment Application Aug. 19, 2005 Central lobe No core was collected from the A4 sandstone within the Central lobe of the Put River Sandstone. However, cuttings from well 15-09A were analyzed for biostratigraphic age control and confinn deposition in a marine setting. Western lobe One well (15-14A) was cored with percussion side-wall cores (Exhibit 1-7). These cores are from the B sandstone which is roughly 6 feet thick in this well. The B sandstone is composed of a fining upwards package of fine-grained to very fine-grained sandstone. Cuttings were described from well 15-48 (Exhibit 1-4) through the B sandstone. Here the B sandstone is 42 feet thick and is composed of fine-grained, well-sorted, subangular to subrounded sandstone containing quartz, chert, glauconite, and some pyrite. Cements include silica, as well as siderite. Northern lobe The NGI-07 (Exhibit 1-8), NGI-13 and WGI-04 wells were cored in the Northern lobe and recovered partial sections through the Put River interval. The Put River Sandstone in all of the wells consists of pebble conglomerates of chert, quartz, and glauconite with a sandstone matrix. The conglomerate clasts in this area were presumably derived from erosion of the underlying Penno- Triassic fonnations. This sandy conglomerate accumulated directly over the LCU during marine transgression. Sedimentary structures are ambiguous, however the presence of glauconite and dinoflagellate cysts in the WGI-04 core suggest deposition in a marine setting. The southern extent of conglomeratic facies in this lobe is not constrained by core. Put River Sandstone Structure Exhibit 1-09 is a top Put River interval (BHRZ) structure map with a contour interval of 50 feet. The Put River interval is bisected by the Midfield Graben structure which is a Brookian reactivation of an older pre-Ivishak structural trend. The Midfield Graben has resulted in a number of potentially isolated compartments within the field, especially in 6/44 ) Prudhoe Oil Pool Rules & Area IUJection Order No. 4C Amendment Application Aug. 19, 2005 the Western lobe. The Northern and Southern lobes also have faulting present which is related to the Brookian reactivation, but the vertical throw of these faults is small and likely does not result in significant reservoir compartmentalization. A large majority of the faults and structure interpreted at the Ivishak and deeper formations are truncated by the LCU. Exhibit 1-10 is a north-south oriented structural cross-section along the axis of the Western and Southern Put River lobes (see Exhibit 1-09 for location). This exhibit shows the overlying and underlying stratigraphy as well as the fault complexity of the area. Exhibit 1-11 is a strike-oriented seismic traverse cutting across the Western and Northern Put River lobes (see Exhibit 1-09 for location). This exhibit shows the faulting in the Midfield Graben as well as the truncation of the deeper Kingak and Ivishak formations by the LCU. Pool Limits The Prudhoe Bay Owners propose including the Put River Sandstone in the defined interval of the Prudhoe Oil Pool in the Prudhoe Oil Pool Rules and the Area Injection Order for the Eastern Operating Area. The addition of the Put River Sandstone is based on the direct juxtaposition of the northern extent of the Put River Sandstone with the Sag Ri ver Sandstone which is part of the current Prudhoe Oil Pool. The areal limit of the Prudhoe Oil Pool will remain unchanged; however, a vertical expansion of the Poollirnits to include the Put River Sandstone is requested. 7/44 l~ " Prudhoe Oil Pool Rules & Area injection Order No. 4C Amendment Application Aug. 19, 2005 II. Reservoir Description and Development Planning Rock and Fluid Properties The available core data and well log control was used to estimate the rock properties and net sandstone volume of the Put River Sandstone. Fluid properties were determined from PVT analysis of downhole and surface samples from wells 02-23A, 15-09A, 15-41B, and 18-27C. Porosity, Permeability, and Water Saturation Rock properties for the A2 sandstone were estimated using a petrophysical log model calibrated to the core data from well 02-14. Geolog's Multimin software was used as the porosityllithology/water saturation solver and was based on gamma ray, density, neutron porosity, sonic, and resistivity logs. A permeability algorithm was derived based on a multiple regression solution between core permeability and log data. The Multimin log model and permeability algorithm were then applied to a total of 14 wells across the Southern lobe that ~ontained a full suite of well logs. A verage porosity and water saturations are 19% and 46%, respectively. Permeability measured from core averages 173 mD. No core data exists for the A4 sandstone, and only minimal core data (sidewall cores from 15-14A and cutting descriptions from 15-28) was collected from the B sandstone. Well 15-14A penetrated 6 feet of the B sandstone near the western terminus. Average porosities and permeabilities are 16% and 4mD, respectively. While numerous wells penetrate these sandstones and define their lateral extent, most only contain cased-hole gamma ray and neutron porosity logs. The porosity distribution calculated for the A2 sandstone was applied to the A4 and B sandstones based on the similar lithology seen in available core data. The water saturation derived from the A2 sandstone was also applied to the A4 sandstone; however, an average water saturation of 28% was applied to the B sandstone. This value was calculated from a petrophysical log model of well 15-47 across the B sandstone. Core data exists from two wells located in the far northern extent of the A/B sandstone. 8/44 U\ ) Prudhoe Oil Pool Rules & Area hlJection Order No. 4C Amendment Application Aug. 19, 2005 Cores from wells NGI-07 and NGI-13 have an average porosity of 13% and water saturation of 13%. Permeability measured from core averages 90 mD. While numerous wells penetrate the A/B sandstone, most only have a partial suite of logs, limiting the ability to develop a petrophysical log model. The southern extent of conglomeratic facies is unknown for the A/B sandstone; however sonic log responses suggest that this interval becomes less conglomeratic to the south. Based on comparisons to the A2 and B sandstones, and core data of sandstone layers in the NGI-07 well a porosity of 17% and a water saturation of 28% was used for the southern half of the A/B sandstone. A summary of the rock properties for the Put River Sandstone is detailed below. Sandstone Porosity I Permeability Water Saturation A2 19% 173mD 46% A4 19%1 nm 46%1 B 19%1 nm 28% AJB north 13% 90mD 13% AJB south 17%2 nffi 28%2 Note: lderivedfrom the A2 sandstone, 2derivedfrom core data and comparisons to the Band A2 sandstones, nm - not measured. Net Pay Southern lobe - A2 sandstone Net pay was determined by a gamma ray cutoff and a minimum porosity of 12%. Exhibit 11-1 shows a cross plot of permeability vs. porosity. The porosity versus permeability relationship of core data from the Put River Sandstone shows that 12% porosity represents roughly 1 mD permeability for sandstone lithofacies. Net pay (Exhibit II-2) was calculated directly from the log model outputs of 14 wells. These results were used to determine net pay in 30 additional offsetting wells that did not contain a full suite of logs. Central and Western lobe - A4 and B sandstones Net pay for the Central (Exhibit 11-3) and Western (Exhibit II-4) lobes was calculated in 9/44 ') Prudhoe Oil Pool Rules & Area Î.lIJection Order No. 4C Amendment Application ) Aug. 19, 2005 27 and 54 wells, respectively. The net pay criteria developed for the A2 sandstone and the petrophysical log model of well 15-47 was used to determine net pay for the A4 and B sandstones. Northern lobe - AIR sandstone Net pay for the Northern lobe was calculated in 73 wells (Exhibit II-5). The available core data and criteria derived from the A2 sandstone was used to determine net pay in the A/B sandstone. Fluid PVT Data Southern lobe The Southern lobe contains black oil. Reservoir fluid properties were evaluated using a downhole oil sample collected from well 02-23A. The bubble point pressure was 2815 psia. The API gravity was 26.9° with a solution gas oil ratio (GOR) of 548 scf/bbl. The formation volume factor was 1.293 res bbUstb with an oil viscosity of 1.84 cP at 3190 psia and 181 degrees Fahrenheit. Central lobe The Central lobe contains black oil. Reservoir fluid properties were evaluated using a downhole oil sample collected from well 15-09 A. The bubble point pressure was 2275 psia. The API gravity was 31.2° with a solution gas oil ratio (GOR) of 485 scf/bbl. The formation volume factor was 1.230 res bbUstb with an oil viscosity of 1.06 cP at 3905 psia and 170 degrees Fahrenheit. Western lobe The Western lobe contains a gas condensate. Reservoir fluid properties were evaluated by recombining surface condensate and gas samples from well 15-41B. During a production test, well 15-41B produced gas and condensate with a gas-oil ratio of 24,650 scf/bbl. This GOR was used for the recombination analysis. The dewpoint pressure was 3435 psia. The condensate API gravity was 57.0°. Northern lobe The Northern lobe contains a gas condensate. Reservoir fluid properties were evaluated 10/44 ) Prudhoe Oil Pool Rules & Area ia'Jection Order No. 4C Amendment Application ) Aug. 19, 2005 by recombining surface condensate and gas samples from well 18-27C. During a production test, well 18-27C produced gas and condensate with a gas-oil ratio of 41,200 scflbbl. This GaR was used for the recombination analysis. The dewpoint pressure was 3215 psia. The condensate API gravity was 59.1°. Exhibit ll-6 shows a summary of the fluid properties for each Put River lobe. Initial Pressure & Temperature (all pressures at a reservoir datum of -8100' sstvd) Southern lobe In the Southern lobe, the initial reservoir pressure was 4163 psia based on the 1980 RFT in well 02-14. The pressure of the Put River Sandstone in this lobe has been reduced by production from the 02-27 and 02-23A and the current reservoir pressure is 2710 psia based on a March 2005 buildup test in well 02-23A. The reservoir temperature is 182 degrees Fahrenheit. Central lobe In the Central lobe, the reservoir pressure is 3923 psia based on a 2004 buildup test in well 15-09A. No Put River Sandstone pressure measurements in this lobe were obtained prior to the pressure buildup test. The reservoir temperature is 164 degrees Fahrenheit. Western lobe In the Western lobe, the initial reservoir pressure was 4234 psia based on the 1992 RFf in well 15-28. A 2005 static pressure measurement in well 15-41B indicated the reservoir is still near the original reservoir pressure. The current reservoir pressure is 4173 psia based on the 2005 15-41B static pressure. The reservoir temperature is 165 degrees Fahrenheit. Northern lobe In the Northern lobe, the initial reservoir pressure was 4191 psi a based on the 1979 RFf in well NGI-13. The Northern lobe of the Put River Sandstone is in communication with the Sag River Sandstone and has been depleted by production from the Prudhoe Oil Pool. The current reservoir pressure is 3422 psia based on a static reservoir pressure 11/44 ., ) Prudhoe Oil Pool Rules & Area Injection Order No. 4C Amendment Application Aug. 19, 2005 measurement in well 18-27C. The reservoir temperature is 172 degrees Fahrenheit. Exhibit 11-7 summarizes the fluid type, pressure, and temperature data of the Put River Sandstone. Hydrocarbons in Place Estimates of hydrocarbons in place for the Put River Sandstone reflect current well control, stratigraphic and structural interpretation, and rock and fluid properties. The Southern lobe is estimated to contain 12.6 - 19.2 million stbo with associated gas of 6.9 - 10.5 BCF in place. The estimate for the Central lobe is 1.1 - 2.7 million stbo in place with associated gas of 0.5 - 1.3 BCF. The Western lobe is estimated to contain 69.6 - 104.4 BCF in place and 108.4 - 160.4 BCF in place for the Northern lobe. A summary of the in place estimates for each lobe is detailed below. Lobe Estimate Oil in Place Estimated Gas in Place Southern 12.6 - 19.2 MMBO 6.9 - 10.5 BCF Central 1.1- 2.7 MMBO 0.5 - 1.3 BCF Western nla 69.6 - 104.4 BCF Northern nla 108.4 - 160.4 BCF Note: All oil in place estimates are in stock tank bbls and all gas in place estimates are at standard conditions. Reservoir Performance Well Performance Recent tests of the Put River Sandstone were accomplished by isolating the Ivishak Formation and perforating the Put River Sandstone in existing wells. Southern lobe The Southern lobe was tested with wells 02-23A and 01-14. Well 02-23A was tested for six months from August 2004 - March 2005 and averaged 1820 bopd, 0% water cut, and 5 mmcfd. A pressure buildup indicated 205 mD permeability with a skin of 1. Well 01- 12/44 ") ) Aug. 19, 2005 Prudhoe Oil Pool Rules & Area injection Order No. 4C Amendment Application 14 was tested in January 2005 and was unable to flow due to poor reservoir quality. The Put River Sandstone production data from we1l2-23A is summarized in Exhibit II-8A. A casing leak in well 2-27 also produced fluids from the Put River Sandstone from 1994 - 1997 with approximate initial rates of 750 bopd and 2 mmcfd. Central lobe The Central lobe was tested with well 15-09A in October 2004. The well tested 240 bopd and 120 mcfd. The Put River Sandstone production data from well 15-09A is summarized in Exhibit II -8B. Western lobe The Western lobe was tested with well 15-41B in December 2004 and April 2005. The well tested at 1.8 mmcfd with 73 bopd. The Put River Sandstone production data from well 15-41B is summarized in Exhibit II-8C. Northern lobe The Northern lobe was tested with well 18-27C. The well tested 6.8 mmcfd with 165 bopd. The Put River Sandstone production data from well 18-27C is summarized in Exhibit II-8D. Aquifer Influx Reservoir appraisal indicates no aquifer supporting the Southern, Central, Western, or Northern lobes of the Put River Sandstone. Gas Coning I Under-Running There are no indications of a free gas column in the Southern or Central lobes of the Put River Sandstone; therefore, coning or under-run mechanisms are not anticipated. The Western and Northern lobes are gas condensate reservoirs. Development Planning A reservoir model is being constructed to evaluate development options. 13/44 ') ) Aug. 19, 2005 Prudhoe Oil Pool Rules & Area Injection Order No. 4C Amendment Application Development Options Development options being evaluated for the Put River Sandstone include primary depletion, waterflood, and miscible gas flood. Primary Recovery The primary recovery mechanism is solution gas drive. Material balance calculations for the Southern and Central lobes of the Put River Sandstone indicate that primary depletion would recover approximately 10% of the STOOIP. Waterflood Waterflood is being evaluated for the Southern lobe of the Put River Sandstone to detennine incremental recovery and feasibility. Enhanced Oil Recovery (EOR) Miscible gas flooding is also being evaluated for the Southern lobe of the Put River Sandstone to detennine incremental recovery and feasibility. Development Plan Put River Sandstone development is envisioned to include approximately one to five production wells in the Southern lobe with one to five injection wells. Options for the Central lobe include producing via primary depletion by recompleting existing wells. Plans for the Western lobe include potentially one to three production wells. The GOR of the Northern lobe is currently above marginal; therefore, no development is currently planned. The production wells may be completed by perforating the Put River Sandstone 1n existing wells or drilling sidetracks into the Put River Sandstone. Well Spacing Well spacing will be irregular with well locations determined considering local faulting and reservoir stratigraphy. 14/44 ) ) Prudhoe Oil Pool Rules & Area lbJ~ction Order No. 4C Amendment Application Aug. 19, 2005 Reservoir Management Strategy Pressure support during primary depletion will be provided from solution gas drive. If waterftood is undertaken, the voidage replacement ratio (VRR) will be maintained near 1.0 Reservoir management will be a dynamic process. The initial strategy will be derived from model studies and well test information. Development well results will increase knowledge and improve predictive capabilities resulting in potential adjustments to the initial strategy. The reservoir management strategy will continue to be evaluated throughout reservoir life. 15/44 ') Prudhoe Oil Pool Rules & Area lhJ~ction Order No. 4C Amendment Application ) Aug. 19, 2005 III. Facilities General Overview The Put River Sandstone will be developed from existing pads and facilities within the Prudhoe Bay field. Drill Pads and Roads The Put River Sandstone is located primarily in the area of Drill Sites 1, 2, 6, 15, and 18. No additional pads or roads are required for Put River Sandstone development. Pad Facilities and Operations The Put River Sandstone development will utilize existing production and injection facilities. Water for a potential waterflood operation would be delivered from the existing 8" seawater injection supply line at Drillsite #1. Estimates indicate the line is sufficient to deliver water to the Put River Sandstone injection wells at 2600 psi. Flow Stations No modifications to the existing flow stations will be required. 16/44 ) Prudhoe Oil Pool Rules & Area la'Jection Order No. 4C Amendment Application ) Aug. 19, 2005 IV. Well Operations Existing Wells Five wells have been completed in the Put River Sandstone and are described in the "Well Performance" section. The test information is attached in Exhibit II-8. Drilling and Well Design Well Design and Completions All Put River Sandstone wells will be designed to the same specifications as current Prudhoe Oil Pool well designs. Idle wells currently completed in the Ivishak Formation may be used for Put River Sandstone development provided they meet the Put River Sandstone needs and contain adequate cement and mechanical integrity. Injectors may be pre-produced prior to converting to permanent injection. Production from these wells could improve their injectivity and be used to evaluate reservoir productivity, connectivity and pressure response, enabling refinement of current reservoir models and depletion plans. Surface Safety Valves Surface safety valves (SSV) will be included in the wellhead equipment for Put River Sandstone wells. Testing of SSV s will be in accordance with AOGCC requirements. Subsurface Safety Valves In light of developments in oil field technology, controls and experience in operating in the arctic environment, the Commission has eliminated SSSV requirements from pool rules for the Prudhoe Oil Pool (Conservation Order 363). If gas or miscible injectant (MI) injectors are drilled, subsurface safety valves (SSSV) will be installed on those wells. All well completions will be equipped with a nipple profile at a depth just below the base permafrost, should the need arise to install a downhole flow control device or pressure operated safety valves for future MI service or during maintenance operations. Drilling Fluids Drilling fluids will be similar to current fluids used in the Prudhoe Oil Pool. 17/44 ) Prudhoe Oil Pool Rules & Area InJcction Order No. 4C Amendment Application ) Aug. 19, 2005 Stimulation Methods Stimulation to enhance production or injection capability is an option for Put River Sandstone wells. Fracture stimulation, acid, or other forms of stimulation may be performed as needed in the future. Reservoir Surveillance Program Reservoir surveillance data will be collected as needed to monitor reservoir performance. 18/44 ) ) Prudhoe Oil Pool Rules & Area tUJection Order No. 4C Amendment Application Aug. 19,2005 v. Area Injection Operations All injection operations will comply with the current injection operation requirements set forth in Area Injection Order No. 4C. 19/44 ) Prudhoe Oil Pool Rules & Area bijection Order No. 4C Amendment Application ) Aug. 19, 2005 VI. Proposed Amendment to Prudhoe Oil Pool Rule BP Exploration (Alaska) Inc., in its capacity as Prudhoe Bay Unit Operator, respectfully requests that the Commission amend the Pool Definition for the Prudhoe Oil Pool in Conservation Order 341 D as described below: Rule 1: Pool Definition (a) The Prudhoe Oil Pool is defined as the accumulations of oil that are common to and which correlate with the accumulations found in the Atlantic Richfield - Humble Prudhoe Bay State No. 1 well between the depths of 8,110 feet and 8,680 feet and shall also include the Put River Sandstone, which is that sandstone interval that correlates with the interval 9,638 to 9,719 measured feet on the Borehole Compensated Sonic Log, Run 2, dated September 28, 1975, in the Atlantic Richfield-Exxon NGI No.1 well. 20/44 0) Prudhoe Oil Pool Rules & Area Injection Order No. 4C Amendment Application ) Aug. 19, 2005 VII. Proposed Amendment to Area Injection Order No. 4C BP Exploration (Alaska) Inc., in its capacity as Prudhoe Bay Unit Operator, respectfully requests that the Commission expand the authorized injection strata for the Prudhoe Oil Pool in Area Injection Order Number 4C as described below: Rule 1: Authorized Injection Strata for Enhanced Recovery Within the affected area, authorized fluids may be injected for purposes of pressure maintenance and enhanced recovery into strata defined as follows: For the Prudhoe Oil Pool strata which correlate with and are common to the formations found in the ARCO Prudhoe Bay State NO.1 well between the measured depths of 8,110- 8,680 feet and shall also include the Put River Sandstone, which is that sandstone interval that correlates with the interval 9,638 to 9,719 measured feet on the Borehole Compensated Sonic Log, Run 2, dated September 28, 1975, in the Atlantic Richfield- Exxon NGI No.1 well. 21/44 \ J Prudhoe Oil Pool Rules & Area lUJcction Order No. 4C Amendment Application ) Aug. 19, 2005 VIII. List of Exhibits 1-1 Put River Sandstone Location Map 1-2 Put River Sandstone Type Log (well NGI-l) 1-3 Stratigraphic Cross Section of Put River interval 1-4 Gross Sandstone Map for Put River Sandstone 1-5 15-09A Put River Sandstone Well Log 1-6 2-14 Put River Sandstone Well Log and Cored Interval 1-7 15-14A Put River Sandstone Well Log and Sidewall Core Points 1-8 NGI-07 Put River Sandstone Well Log and Cored Interval 1-9 Structure Map of Top Put River Interval 1-10 North-South Structural Cross Section 1-11 Strike-Oriented Structural Cross Section II-I Put River Sandstone Porosity-Permeability Crossplot 11-2 Net Pay Map of the Southern lobe 11-3 Net Pay Map of the Central lobe 11-4 Net Pay Map of the Western lobe 11-5 Net Pay Map of the Northern lobe II -6 Fluid Properties Summary 11-7 Summary of Fluid Type, Pressures, and Temperatures 11-8A 2-23A Production Test Results 11-8B 15-09A Production Test Results 11-8C 15-41B Production Test Results 11-8D 18-27C Production Test Results 22/44 "= ., C Q. =- Q ~ o =.: ~ 2- ,., c ¡:r V1 r<o > ., ~ Q - 2 1\ (', c ...~. Õ· = o ., Q. ~ ., Z ? .¡:. n > a ~ = Q. a ~ sa. > "= '2. ¡:;. ~ õ' = -- ~ > c ~ ~ :;e N ø ~ ..- .. a r>.r·ë.-=--'~=""=;;';;·'l ~ tJ ~ ¡ 1'~--~--'~~~~- _1 ~"~-="'':::'~~==-~~"~~'''''"''L ~--L~ "l~ ----- t- j~ ~ - ,~- - .- .............~--~~ -......=-- -~~~ ': _ ~-.. ~ . , . "'~-~~'- .-- ~ -~ <0 P c 1 <2 f:i?" Q ¡ ~ ) \\ "'SF ø - J 4"<> '" . ... tl Ll J[ V'o ~ ,ç ~ Q t' .. ". J D lIB :- C ::::::ì .f .~ .. , f tp'W 0:I..n. ... :'. . ~"~~I . t ~ .~ g c~\. _ . . c" fje Cl ~ \ .....ge' ~. ~\" r~' hi) t 6 ~a. ~ :: ~_ ---~..:---: ./: -! __.. .1 =--~- ""¡ '" · Ii '30 ~ . ~ ~ ~"'~"~ _ · 'I¡ . r " · '\1 ~. g.. ,1,':'" .J.. ',S':....:..........~.... ". ~c_ ~ ". a \) Æ ~ ~~., :c::~})R i ~ L ~ . 4 ~ ..~"" é ø'r.. .. .' \\. .-rlt. t L" ~ 'ñ C QUC' ~) .\1 ¡..J =i! : q. tf}l .,~ 0...'·· I\.. a; ~ ___ .. . .\"':"'~. \.r. "iJ -<..~",T c' ~. ~ ,J.;i5.\\ \:'-';' ..... ~.J1 1 .. EO '_cCI':' D-.·· . Ch)~ ~ ___~ ":. _0. ~ þ ~ -~~-'è:~-\ . .... ~jJ ..__. '~,,"~~T~l ~ ' ~ ~ ~ .~--~.: ~ ~ ..' A J '" ~ 'tJ, ~ -_·:'··-~L·····~ '. ;.J .... f. - ~ ~ ~'- -=--- ~ . -- ..,..'- ~ --~-~~"'~~:~~ -~~~~''''-. "...,. ... ,- .~ ~ -- _w ~ f1 - ..... ~~:~~~:~ " 1<;/ PBu UN I BOUNDARY! t î~2~~~~;~~ I....... ' .....' I ...~_ '1\ tfj ~ OJ=: o r:1" c= .... =:s ..... o..Þ-I ~ ~ ,-<. . Q 8 rJ) rJ) ~ r-t' ~ <: ('þ "'1 en § 0.. (/J r-t' o ~ 3 ~ rJ) t:r' o ~ =:s ~ ë: g- ""0 a §= o ('þ OJ Pù '-< C ::3 """, r-t' N VJ "- ~ ~ ) Prudhoe Oil Pool Rules & Area inJcction Order No. 4C Amendment Application Well Name: NGI-01 API: 500292017100 Spud Date: 1975-10-07 Measurement Ref: KB Ref. Elevation: 47 Drilled Depth: 10437' X Coordinate: 687351 y Coordinate: 5971401 WIRE.GR_BHCS_1 GAP! 150 , I ."....-..--.-. , .. ,:...10\,.' .'::~- ----,-'----,- . -8150- ) Aug. 19, 2005 BHRZ - Bottom Highly Radioactive Zone LCU - Lower Cretaœous Unconformity TSGR - Top Sag River Sandstone WIRE.SFL_DIL_1 WIRE.RHOB_DENS_1 200 1,6$ GIC3 2,65 en en <! o 0,2 OHMM 3: ........ ~1.~~,~~~,:"~~~-:1........._ _ _ _ _W~~E:.N~~-=-C~I:!.. _ _ __ I:) 0,2 OHMM 200 eo PU ° _ _ _ _ _ ~~R§.~~_~I~_~ _ _ _ _ _ WIRE.DT _BHCS_1 0,2 200 150 50 USIF OHMM -8000 9650 -8050 9700 -8100 9750 9800 Exhibit 1-2. Put River Sandstone type log in NGI-Ol. 24/44 CA CD O R O CD C CD I COD M P O N WGI-04 NGI-07 S NGI-01 18-27 15-09A 15-41 15-47 2-1 6 2-14 2-23 Blostratiaraohme Aoe Control Albian 1 ® Albian/Aptian Ba rremian/Ha ute riv i an I. Jurassic 5000 ft i Dat4 T—,-j i((, I . , Put River cn Sandstone Kalubik Fm. TJB t_Cu A2 IM ale t TJA Sandstone ublik `� -- TSHA I . \ f. it Formation � Ivishak Formation ,I TSAD J RU a F�-- • Prudhoe Oil Pool Rules & A Order No. 4C Amendment 19,2005 2 Prudhoe Oil Pool Rules & Area Order No, Amendment Aug.!!),2005 BHRZ " Bottom Radioactive Zone LCU " Lower Cretaceous 2 Prudhoe Pool Rules & Order No. 4C Amendment Aug. 19,200S BHRZ " Bottom Radioactive Zone LCU " Lower Cretaceous WIRE.SFL_OiL_' 2 Prudhoe Oil Pool Rules & Area Order No. 4C Amendment Aug. 19, 200S API: BHRZ " Bottom Radioactive Zone LCU " Lower Cretaceous core Prudhoe Oil Pool Rules Order 4C Amendment Aug. 19, 200S BHRZ " Bottom " Lower TSHA" TSAD " 41 8635' 687182 Y Coordinate: 5972101 Formation Ivishak Formation Prudhoe Oil Pool Rules &: Order Amendment ~~\I<~~¡¡ ;:'9~,\!M 21105 '>11(1:·1)\1\1 31 l>rudhoe Oil Pool Rules &: Order No. Amendment 19,2005 o o o N 3 Prudhoe Oil Pool No. 19,2005 1500 ms 2000 3 l'n¡dhoe Oil Pool Rules &: Order No, 4C Amendment Aug, 2005 1 1 1 1 o versus 10 are II o I' cores Prmihue Oil Pool Rules &: Area :¡."9SS,øij$- :;¡,ssa,SIí!0- S.91$.Ø0il- 5.SH,¡'hØQi:~ i>.ae,¡.@,WQ Order No, Amendment ßßS"¡iØß aa¡;',¡9QQ &95,[880 , 6U$.aaø t iï$S}0$0 , 69i:t¡.aaø , 595d'ÍÐß 21105 ....'J,9SS.øaa ~5,95i'kgea. --S.011'5,920 1 291'0 S9g1B 9Ø~0 }0~00: fEH '1Sf.'0 35 Prudhoe Oil Pool Rules &: $. 973~ 000- 5,965,000 - 5.9õ'hees- Aug. 21105 Order Amendment Ôfrs,¡øø.e , <! 5000 ~ FEE! 3 Order No, 4C Amendment Application Prudhoe Oil Pool Rnles &: Area ß'1IMI0.& 5,91~h9$!j 5.\nø.ß0ß- :s~s65.e8&- S.9Sßd!:!!i!'l- S.9.S5d'¡l1ie~ $.9$8.111:10- ß7ß.e9@ ß7s.Ðaø , $iUôI.!'j!!Ui \ , I;ps.a0$ fæa:eQ9 t -'''Ø" ,~ j..05HHl.rn; UH.e:S aø~0 $Ø~Ø t0lô!Ø3 fEET " aas.Ðlilø I , 68s.a1ííQ Aug, 19, 2005 6$ój!.Jijø.a S.9c7S.ßØ0 ,;,s-.-s:w.èe:0 ~5.%Sd¡n0 -S.':j5e..m¡1ii -5..955.110$ -5.~sa:.0.aß; ß90.Ø:0B- 3 Prudhoe Pool Rules &: Order No. Amendmeut Aug. 2005 ¡¡ss.,*aß /¡,g1/,/iiBB ßS$'II'!'ßá 1JiQ.0ae $.'òI!I0.$ee ! 5.g¡)ihøøa 5.-¡r1$dJ:9B-~ :$dr1e.eej- 5,'il65,a!!lB- 5d6ø.øaD- ~h$55.i'la0-- . ~~ -':h9&thßØf! -5dIJS~ 0~ -S.1).18.ßM -5.9G5.0iMi -ôh9S5-.!t0.ß , 6SS..ø:ø.e: $9&:660 , 6.9.5.00Q , 161haße t ,2 io l' t.p $l'Af'UTE M{~ Sopl1 aopo lJDfJO toqoo FEeT r££f<t¡ 3 Prudhoe Oil Pool Rules & Area >... .,~}tion Order No. 4C Amendment Application ,) Aug. t 9, 2005 Southern ,and ,Central Lob:e Oil PrOlJe:rties Re:s;ell.~voiI'Plress ure Res;el'Yo:h' T en11Jcrature Soutbe!ru lobe Wen 2·- 23.A 3190 psia 181 deo- F "=' Bubble Point 2815 psia S'el1al'atolJ.' 'GOR API 'Gravity 548 sctìbbl 26.9 deg. API on Viscosity 1..84cP on D'ensity 0.769 glee ·Fol.'luatÌon V olulne F:a·ctol' 1.293 res bbVSTB Cenh'allobe W·eU 1.5,-09 A 390:5 psia 170 deg F 227:5 psia 485 scflbbl 31.2 deg. API 1,,06,cP 0.769 g/ee 1..230 res bblfSTB Note: 8eparato.l' GOR, APIgl'i..-1vity" a'tu..i,pJrmatim7 volu.m:eß7cto1" measured with lei ;s'Ù1g¡ø-sh~ge s.epal'l..1tor../lash at 2.15 p.:Ûa/i1() deg F and 14,9 p.sia/60 deg F. Oil vt.'5'cosily ,and density ,measured at cUJ'rent reservrOÙ'conditio:ns. Westerna:ndNort.bern Lobe Gas Properties Reset'voir P¡'eSSUl'e Reset'voir Tenlperature 'Vestcl'n lobe 'Veil 15,-41 B 4120 psia 165 deg F .Dew Point 3435 psia COlldensateAPI Gravity 57.0 degAPI Condensate Density 0.750 glee Exhibit 11-6. Put River Sandstone fluid properties summary. NOl'thern lobe W:eU 1:8-:2'7C 3410 psîa 172 deg F 321.5 psia 59.1 deg API 0.742 g/ee 39/44 Prudhoe Oil Pool Rules & Are.. .,}ction Order No. 4C Amendment Application ) Aug. 19, 2005 Put Rive:r Reservoi." Summary Southern lobe Central lobe Western lobe No.·thern lobe Fluid Type Black Oil Black Oil Gas Condensate Gas Condensate .Initial Reservoh' Pressure 4173 psìa nia 4190 psìa 4130 psìa (Datum pressure) (4163 psia) nla (4234 psìa) {4191 psìa) Curr,ent Reservoir Pressure 2729 38 I 7psia 4119 psia 3396 psia (Datum pressure) (27l'Ü psia) (3923 psia) (4173 psia) (3422 psia) Re·servoÌr Temperature 182 deg F 164 deg F 165 deg F 172 deg.F l'v':t.>le:' Put Rh,I;er reservoir datum is -8100' sstvd. Exhibit 11-7. Put River Sandstone fluid type, pressure and temperature summary. 40/44 Prudhoe Oil Pool Rules & Order No. Amendment 2005 3500 3000 2500 ;E! u 20tlO E E :Ji ·t500 12: =: "" 0 ~ " ~OtlO 5t1O \) test. 41 Prudhoe Oil Pool Rules & Order No. 4C Amendment Application Aug. 2005 1 eao JIi " ..., :> <> é ~ « ~ ;:¡ e Wi' '" œ 5 .; '!if "" ... ,¡¡; -;. ." '" ,. õ test. Prudhoe Oil Pool Rilles & Area Order 4C Amendment Aug. 19, 2005 1 .., Q. <:> .., Š :}. i!! '" '" '" "" '" " <) Gas Lltted ProductiOf1 !\Ion43as !..f!ed ProducliQn - 29·Mar 3(!·Mar ~.,J:\pr 2·Ap; 3·Apr 4·Apr 3HVlar test 10 ~~ Q e S ~ '" œ '" '" ç:! 2 5·Apr Prudhoe Oil Pool Rilles & Order No. 4C Amendment Aug. 19, 2005 '1 "" ~ D .,; 1\; t1I:: Õ .. 0 "" '" '" '" if? ~ "! 'î 'î 1: '" " " '" ;0 '" :! :i!' :i!' :¡¡ :i!' :i!' '" '" <t '" ¡!¡ '" '" '" '" test. #1 bp . . August 11, 2005 Mr. John Norman, Chair Alaska Oil and Gas Conservation Commission 333 West 7th Ave, Suite 100 Anchorage, AK 99501 ,~UG 1 1 '¿OO,; " i"'__I'1'\ns~~miss\on ~'~~i;1IVV G·' t~1Charage---- Re: Application for Amendment of Conservation rder o. 460 for the Prudhoe Oil Pool and Area Injection Order No. 4C to inclu~~e t ~dstone Dear Chainnan Norman: ,11 ~ ' BPXA, as Operator of the Prudhoe Ba /~ ereby submits an application to expand the existing Prudhoe Oil Pool and Area I ect Order to include the Put River Sandstone, Since the northern lobe of the Put River ne is in hydraulic communication with the Sag River Sandstone which is rt of the c rudhoe Oil Pool, expansion of the Prudhoe Oil Pool is appropriate for this mal1-sc I pment. If you have any questions about the application, please contact Jame Dean 5 8) or Leslie Senden (564-5488). Sincerely, d· ¡¿ Tim~ Gravity Drainage Te m Lead Greater Prudhoe B y cc: Dan Kr se, ConocoPhillips Alaska, Inc. Sonn Rix, ExxonMobil Ian Williamson, AOGCC e Kotowski, DNR . . Application for Amendment of Conservation Order No. 460 for the Prudhoe Oil Pool and Area Injection Order No. 4C to include the Put River Sandstone August 11, 2005 Prudhoe Oil Pool Rwes & Area .tion Order No. 4C Amendment Application . Aug. 11, 2005 Table of Contents I. Geology... ... ............ ..... ...... ........ ............ ........ ..................... ........ .... ........ .... .... ... ... 3 Introduction..................................................................................................................... 3 Stratigraphy..................................................................................................................... 3 Lithology/Depositional Environment............................................................................. 5 Put River Sandstone Structure ..................................... .............. .................. ....... ............ 6 Pool Limits...................................................................................................................... 7 II. Reservoir Description and Development Planning ........................................ 8 Rock and Fluid Properties............. .............. ....... ...................... ..... .................. ........... ..... 8 Hydrocarbons in Place. ........... .............. ..................... ........ ...... ..................................... 12 Reservoir Performance.................................................................................................. 12 Development Planning.................................................................................................. 13 Development Options................................................................................................... 14 Development Plan......................................................................................................... 14 Reservoir Management Strategy .......................................................... ........ ..... ..... ....... 15 III. Facilities .... ..... ......... ........... ..... ...... ..... ... ............. ............ ...... ..... ..... ... .... ......... .16 General Overview.. ......... .......... ...... ......... .... ...... ........................................................... 16 Drill Pads and Roads..... ... ........ ......... ..................... ..................... .................................. 16 Pad Facilities and Operations.......................... ...................................... ............ ........ .... 16 Flow Stations................................................................................................................ 16 IV. Well Operations ..............................................................................................17 Drilling and Well Design ................ ................ ............................ ......................... ......... 17 Reservoir Surveillance Program .... ................................................ ..... ............. ...... ....... 18 V. Area Injection Operations .............................................................................19 VI. Proposed Amendment to Prudhoe Oil Pool Rule........................................20 VII. Proposed Amendment to Area Injection Order No. 4C ...........................21 VIII. List of Exhibits ............................................................................................22 2/44 . . Prudhoe Oil Pool Rules & Area Injection Order No. 4C Amendment Application Aug.1l,2005 I. Geology Introduction The Put River Sandstone is located on Alaska's North Slope within the Prudhoe Bay Unit, as illustrated in Exhibit 1-1. It overlies the Kingak Shale and Sadlerochit Group in the vicinity of Drill Sites 1, 2, 5, 6, 7, 15, 18, NGI, and WGI. The Put River Sandstone is the sandstone interval that correlates with the interval 9,638 to 9,719 feet measured depth on the Schlumberger Borehole Compensated Sonic Log Run 2 dated September 28, 1975, in the Atlantic Richfield-Exxon NGI No.1 Well (API 50-029-20171). The Put River Sandstone, along with the Kalubik Formation (shale and siltstone), is part of the Put River interval that lies stratigraphically above the Lower Cretaceous Unconformity (LCU) and below the Highly Radioactive Zone (HRZ) (Exhibit 1-2). The Prudhoe Bay Owners propose including the Put River Sandstone in the Prudhoe Oil Pool Rules and the Area Injection Order for the Eastern Operating Area. The addition of the Put River Sandstone is based on the direct juxtaposition of the northern extent of the Put River Sandstone with the Sag River Sandstone which is part of the current Prudhoe Oil Pool. The proposed amendments to the Prudhoe Oil Pool Rules and Area Injection Order are intended to encompass any area within the Prudhoe Bay Unit with Put River Sandstone. The Put River Sandstone was included as part of the Prudhoe Bay (Permo-Triassic) Reservoir in the Prudhoe Bay Unit Agreement and was evaluated with core and RFf measurements in wells NGI-7, NGI-13, NGI-14, WGI-04, and 02-14 from 1978 - 1980. In the early 1990's, RFT measurements were also collected in wells 15-28 and 15-47. The Put River Sandstone was perforated and tested in wells 02-23A, 1-14, 15-41B, 15- 09A, and 18-27C in 2004 and 2005. Wells 02-23A and 15-09A confirmed black oil accumulations and wells 15-41B and 18-27C produced gas condensate. Stratigraphy The Put River Sandstone was deposited in the Early Cretaceous geologic time period, between 100 and 130 million years before present. Exhibit 1-2 shows a portion of the open-hole wireline logs from the Richfield-Exxon NGI No.1 Well (API 50-029-20171). 3/44 Prudhoe Oil Pool Rules & Area .tion Order No. 4C Amendment Application . Aug. 11, 2005 This type log illustrates the stratigraphic definition of the Put River Sandstone. The log is scaled in measured depth (MD) and also has a true vertical depth subsea (TVDss) track. In the NGI No. 1 well the base of the Put River Sandstone occurs at 9,719'MD (-8076'TVDss) and the top occurs at 9,638' MD (-8011 'TVDss). Elsewhere the Put River Sandstone is interbedded with shales and siltstones of the Kalubik Fonnation. Together, the Put River Sandstone and Kalubik Fonnation make up the Put River interval. The Put River interval lies unconfonnably above Jurassic and older strata and confonnably below the Cretaceous Highly Radioactive Zone (HRZ). The Lower Cretaceous Unconformity (LCU) is the basal unconformity of the Put River interval. The LCU is evidenced by a distinct change in lithofacies, angular discordance with underlying strata, and in palynological and micopaleontological assemblages (Exhibit 1-3). In its southern extent, the Put River interval overlies the Jurassic Kingak Shale. In the most northeastern extent, under the NGI/WGI area, the Put River interval lies directly on the Triassic Sag River Sandstone. The sediments deposited in the Put River interval were locally derived from an exposed highland to the northeast and represent an overall marine transgression following uplift and erosion. Four vertically significant and laterally extensive sandstone bodies (or lobes) have been correlated within the Put River interval. They are tenned the Southern, Central, Western, and Northern lobes of the Put River Sandstone (Exhibit 1-4). The Northern lobe comprises the entire Put River interval, as shown in the type log of NGI-01 (Exhibit 1-2). The remaining three lobes are stratigraphically equivalent to the Northern lobe and are interbedded with the Kalubik Fonnation (Exhibit 1-3). Biostratigraphic age control confinns these correlations. The locus of deposition for each sandstone lobe was controlled by the interplay of erosional and structural paleotopography fonned along the LCU, and sediment dispersal. There appears to have been two main pulses of sandstone deposition within the Put River interval. The first is recorded by the A2 and A4 sandstones. The A2 sandstone lies directly on the LCU and is thickest in the south. The Southern lobe of the Put River Sandstone is entirely composed of the A2 sandstone where it is up to 41 feet thick. Sediment accumulation was constrained by erosional paleotopography into the Kingak 4/44 . . Prudhoe Oil Pool Rules & Area Injection Order No. 4C Amendment Application Aug. 11, 200S Shale. The A4 sandstone is separated from the A2 sandstone by a thin shale/siltstone layer. The A4 sandstone is thickest within the Midfield Graben (up to 22 feet thick), and presumably filled remnant structurally-controlled paleotopography. The Central lobe of the Put River Sandstone is entirely composed of the A4 sandstone. Following deposition of the A sandstones, marine transgression limited the supply of coarse-grained sediment. Many wells contain a layer with an anomalously high gamma-ray log signature in this interval (Exhibit 1-5). The B sandstone overlies this thin transgressive package representing the second pulse of coarse-grained deposition. It is up to 75 feet thick, and comprises the Western lobe of the Put River Sandstone. To the south the distal portion of the B sandstone correlates to thin sandstone/siltstone beds. The Northern lobe of the Put River Sandstone is composed of both the A and B sandstones. The transgressive unit separating the two is not well- developed in this area, presumably due to proximity of the clastic source. Thus the B sandstone typically lies directly on the A sandstone in the Northern lobe, forming one composite sandstone body that is up to 69 feet thick. LithologylDepositional Environment Southern lobe The entire A2 sandstone was cored in well 02-14 (Exhibit 1-6). Here the sandstone is a medium-grained, moderately-to well-sorted chert-lithic arenite with localized pebble layers. The detrital mineralogy is predominantly quartz and chert; with minor amounts of feldspar and fine-grained lithic fragments. Glauconite occurs as disseminated and granular accumulations in concentrations of up to 15%. Clay content is largely associated with the finer-grained and poorly-sorted intervals; it is not pervasive through the matrix. Beds generally fine upward and bioturbation is common. Visible porosity ranges from 10-20% with little pervasive cementation. Quartz overgrowths occur on most grains, with quartz cement best developed in well-sorted sandstone beds. Siderite cement occurs locally mostly near the top and base of the A2 sandstone. The A2 sandstone is interpreted as a lower shoreface deposit. An abundant assemblage of trace fossils, sedimentary structures, and glauconite content support this interpretation. 5/4.:1 Prudhoe Oil Pool Rules & Areaetion Order No. 4C Amendment Application . Aug. 11, 2005 Central lobe No core was collected from the A4 sandstone within the Central lobe of the Put River Sandstone. However, cuttings from well 15-09A were analyzed for biostratigraphic age control and conflrm deposition in a marine setting. Western lobe One well (15-14A) was cored with percussion side-wall cores (Exhibit 1-7). These cores are from the B sandstone which is roughly 6 feet thick in this well. The B sandstone is composed of a flning upwards package of flne-grained to very flne-grained sandstone. Cuttings were described from well 15-48 (Exhibit 1-4) through the B sandstone. Here the B sandstone is 42 feet thick and is composed of fine-grained, well-sorted, subangular to subrounded sandstone containing quartz, chert, glauconite, and some pyrite. Cements include silica, as well as siderite. Northern lobe The NGI-07 (Exhibit 1-8), NGI-13 and WGI-04 wells were cored in the Northern lobe and recovered partial sections through the Put River interval. The Put River Sandstone in all of the wells consists of pebble conglomerates of chert, quartz, and glauconite with a sandstone matrix. The conglomerate clasts in this area were presumably derived from erosion of the underlying Permo-Triassic formations. This sandy conglomerate accumulated directly over the LCU during marine transgression. Sedimentary structures are ambiguous, however the presence of glauconite and dinoflagellate cysts in the WGI-04 core suggest deposition in a marine setting. The southern extent of conglomeratic facies in this lobe is not constrained by core. Put River Sandstone Structure Exhibit 1-09 is a top Put River interval (BHRZ) structure map with a contour interval of 50 feet. The Put River interval is bisected by the Midfield Graben structure which is a Brookian reactivation of an older pre-Ivishak structural trend. The Midfleld Graben has resulted in a number of potentially isolated compartments within the field, especially in 6/44 Prudhoe Oil Pool Rules & Arlection Order No. 4C Amendment Application . Aug. 11, 2005 the Western lobe. The Northern and Southern lobes also have faulting present which is related to the Brookian reactivation, but the vertical throw of these faults is small and likely does not result in significant reservoir compartmentalization. A large majority of the faults and structure interpreted at the Ivishak and deeper formations are truncated by the LCU. Exhibit 1-10 is a north-south oriented structural cross-section along the axis of the Western and Southern Put River lobes (see Exhibit 1-09 for location). This exhibit shows the overlying and underlying stratigraphy as well as the fault complexity of the area. Exhibit 1-11 is a strike-oriented seismic traverse cutting across the Western and Northern Put River lobes (see Exhibit 1-09 for location). This exhibit shows the faulting in the Midfield Graben as well as the truncation of the deeper Kingak and Ivishak formations by the LCU. Pool Limits The Prudhoe Bay Owners propose including the Put River Sandstone in the defined interval of the Prudhoe Oil Pool in the Prudhoe Oil Pool Rules and the Area Injection Order for the Eastern Operating Area. The addition of the Put River Sandstone is based on the direct juxtaposition of the northern extent of the Put River Sandstone with the Sag River Sandstone which is part of the current Prudhoe Oil Pool. The areal limit of the Prudhoe Oil Pool will remain unchanged; however, a vertical expansion of the Pool limits to include the Put River Sandstone is requested. 7/44 Prudhoe Oil Pool Rules & Area.ion Order No. 4C Amendment Application . Aug. 11, 2005 II. Reservoir Description and Development Planning Rock and Fluid Properties The available core data and well log control was used to estimate the rock properties and net sandstone volume of the Put River Sandstone. Fluid properties were determined from PVT analysis of downhole and surface samples from wells 02-23A, 15-09A, 15-41B, and 18-27C. Porosity, Permeability, and Water Saturation Rock properties for the A2 sandstone were estimated using a petrophysical log model calibrated to the core data from well 02-14. Geolog's Multimin software was used as the porosityllithology/water saturation solver and was based on gamma ray, density, neutron porosity, sonic, and resistivity logs. A permeability algorithm was derived based on a multiple regression solution between core permeability and log data. The Multimin log model and permeability algorithm were then applied to a total of 14 wells across the Southern lobe that contained a full suite of well logs. Average porosity and water saturations are 19% and 46%, respectively. Permeability measured from core averages 173 mD. No core data exists for the A4 sandstone, and only minimal core data (sidewall cores from 15-14A and cutting descriptions from 15-28) was collected from the B sandstone. Well 15-14A penetrated 6 feet of the B sandstone near the western terminus. Average porosities and permeabilities are 16% and 4mD, respectively. While numerous wells penetrate these sandstones and define their lateral extent, most only contain cased-hole gamma ray and neutron porosity logs. The porosity distribution calculated for the A2 sandstone was applied to the A4 and B sandstones based on the similar lithology seen in available core data. The water saturation derived from the A2 sandstone was also applied to the A4 sandstone; however, an average water saturation of 28% was applied to the B sandstone. This value was calculated from a petrophysical log model of well 15-47 across the B sandstone. Core data exists from two wells located in the far northern extent of the AIB sandstone. 8/44 Prudhoe Oil Pool Rules & Area _ion Order No. 4C Amendment Application . Aug. 11, 2005 Cores from wells NGI-07 and NGI-13 have an average porosity of 13% and water saturation of 13%. Permeability measured from core averages 90 mD. While numerous wells penetrate the A/B sandstone, most only have a partial suite of logs, limiting the ability to develop a petrophysical log model. The southern extent of conglomeratic facies is unknown for the A/B sandstone; however sonic log responses suggest that this interval becomes less conglomeratic to the south. Based on comparisons to the A2 and B sandstones, and core data of sandstone layers in the NGI-07 well a porosity of 17% and a water saturation of 28% was used for the southern half of the A/B sandstone. A summary of the rock properties for the Put River Sandstone is detailed below. Sandstone Porosity Permeability Water Saturation A2 19% 173mD 46% A4 19%1 nm 46%1 B 19%1 nm 28% AIB north 13% 90mD 13% AIB south 17%2 nm 28%2 Note: lderivedfrom the A2 sandstone, 2derivedfrom core data and comparisons to the Band A2 sandstones, nm - not measured. Net Pay Southern lobe - A2 sandstone Net pay was determined by a gamma ray cutoff and a minimum porosity of 12%. Exhibit II-I shows a cross plot of permeability vs. porosity. The porosity versus permeability relationship of core data from the Put River Sandstone shows that 12% porosity represents roughly 1 mD permeability for sandstone lithofacies. Net pay (Exhibit 11-2) was calculated directly from the log model outputs of 14 wells. These results were used to determine net pay in 30 additional offsetting wells that did not contain a full suite of logs. Central and Western lobe - A4 and B sandstones Net pay for the Central (Exhibit 11-3) and Western (Exhibit 11-4) lobes was calculated in 9/44 . Prudhoe Oil Pool Rules & Area Injection Order No. 4C Amendment Application . Aug. 11, 2005 27 and 54 wells, respectively. The net pay criteria developed for the A2 sandstone and the petrophysical log model of well 15-47 was used to determine net pay for the A4 and B sandstones. Northern lobe - AlB sandstone Net pay for the Northern lobe was calculated in 73 wells (Exhibit 11-5). The available core data and criteria derived from the A2 sandstone was used to determine net pay in the AIB sandstone. Fluid PVT Data Southern lobe The Southern lobe contains black oil. Reservoir fluid properties were evaluated using a downhole oil sample collected from well 02-23A. The bubble point pressure was 2815 psia. The API gravity was 26.9° with a solution gas oil ratio (GOR) of 548 scf/bbl. The formation volume factor was 1.293 res bbllstb with an oil viscosity of 1.84 cP at 3190 psia and 181 degrees Fahrenheit. Central lobe The Central lobe contains black oil. Reservoir fluid properties were evaluated using a downhole oil sample collected from well 15-09A. The bubble point pressure was 2275 psia. The API gravity was 31.2° with a solution gas oil ratio (GOR) of 485 scf/bbl. The formation volume factor was 1.230 res bbllstb with an oil viscosity of 1.06 cP at 3905 psia and 170 degrees Fahrenheit. Western lobe The Western lobe contains a gas condensate. Reservoir fluid properties were evaluated by recombining surface condensate and gas samples from well 15-41B. During a production test, well 15-41B produced gas and condensate with a gas-oil ratio of 24,650 scf/bbl. This GOR was used for the recombination analysis. The dewpoint pressure was 3435 psia. The condensate API gravity was 57.0°. Northern lobe The Northern lobe contains a gas condensate. Reservoir fluid properties were evaluated 10/44 Prudhoe Oil Pool Rules & Area etion Order No. 4C Amendment Application . Aug. 11, 2005 by recombining surface condensate and gas samples from well 18-27C. During a production test, well 18-27C produced gas and condensate with a gas-oil ratio of 41,200 scflbbl. This GaR was used for the recombination analysis. The dewpoint pressure was 3215 psia. The condensate API gravity was 59.1°. Exhibit 11-6 shows a summary of the fluid properties for each Put River lobe. Initial Pressure & Temperature (all pressures at a reservoir datum of -8100' sstvd) Southern lobe In the Southern lobe, the initial reservoir pressure was 4163 psia based on the 1980 RFf in well 02-14. The pressure of the Put River Sandstone in this lobe has been reduced by production from the 02-27 and 02-23A and the current reservoir pressure is 2710 psia based on a March 2005 buildup test in well 02-23A. The reservoir temperature is 182 degrees Fahrenheit. Central lobe In the Central lobe, the reservoir pressure is 3923 psia based on a 2004 buildup test in well 15-09A. No Put River Sandstone pressure measurements in this lobe were obtained prior to the pressure buildup test. The reservoir temperature is 164 degrees Fahrenheit. Western lobe In the Western lobe, the initial reservoir pressure was 4234 psia based on the 1992 RFT in well 15-28. A 2005 static pressure measurement in well 15-41B indicated the reservoir is still near the original reservoir pressure. The current reservoir pressure is 4173 psia based on the 2005 15-41B static pressure. The reservoir temperature is 165 degrees Fahrenheit. Northern lobe In the Northern lobe, the initial reservoir pressure was 4191 psia based on the 1979 RFT in well NGI-13. The Northern lobe of the Put River Sandstone is in communication with the Sag River Sandstone and has been depleted by production from the Prudhoe Oil Pool. The current reservoir pressure is 3422 psi a based on a static reservoir pressure 11/44 Prudhoe Oil Pool Rules & Area.ion Order No. 4C Amendment Application . Aug. 11, 2005 measurement in well 18-27C. The reservoir temperature is 172 degrees Fahrenheit. Exhibit 11-7 summarizes the fluid type, pressure, and temperature data of the Put River Sandstone. Hydrocarbons in Place Estimates of hydrocarbons in place for the Put River Sandstone reflect current well control, stratigraphic and structural interpretation, and rock and fluid properties. The Southern lobe is estimated to contain 12.6 - 19.2 million stbo with associated gas of 6.9 - 10.5 BCF in place. The estimate for the Central lobe is 1.1 - 2.7 million stbo in place with associated gas of 0.5 - 1.3 BCF. The Western lobe is estimated to contain 69.6 - 104.4 BCF in place and 108.4 - 160.4 BCF in place for the Northern lobe. A summary of the in place estimates for each lobe is detailed below. Lobe Estimate Oil in Place Estimated Gas in Place Southern 12.6 -19.2 MMBO 6.9 - 10.5 BCF Central 1.1- 2.7 MMBO 0.5 - 1.3 BCF Western nJa 69.6 - 104.4 BCF Northern nJa 108.4 - 160.4 BCF Note: All oil in place estimates are in stock tank bbls and all gas in place estimates are at standard conditions. Reservoir Performance Well Performance Recent tests of the Put River Sandstone were accomplished by isolating the Ivishak Formation and perforating the Put River Sandstone in existing wells. Southern lobe The Southern lobe was tested with wells 02-23A and 01-14. Well 02-23A was tested for six months from August 2004 - March 2005 and averaged 1820 bopd, 0% water cut, and 5 mmcfd. A pressure buildup indicated 205 mD permeability with a skin of 1. Well 01- 12/44 Prudhoe Oil Pool Rules & Area .on Order No. 4C Amendment Application . Aug. 11, 2005 14 was tested in January 2005 and was unable to flow due to poor reservoir quality. The Put River Sandstone production data from well 2-23A is summarized in Exhibit II-8A. A casing leak: in well 2-27 also produced fluids from the Put River Sandstone from 1994 - 1997 with approximate initial rates of750 bopd and 2 mmcfd. Central lobe The Central lobe was tested with well 15-09A in October 2004. The well tested 240 bopd and 120 mcfd. The Put River Sandstone production data from well 15-09A is summarized in Exhibit II-8B. Western lobe The Western lobe was tested with well 15-41B in December 2004 and April 2005. The well tested at 1.8 mmcfd with 73 bopd. The Put River Sandstone production data from well 15-41B is summarized in Exhibit II-8C. Northern lobe The Northern lobe was tested with well 18-27C. The well tested 6.8 mmcfd with 165 bopd. The Put River Sandstone production data from well 18-27C is summarized in Exhibit II-8D. Aquifer Influx Reservoir appraisal indicates no aquifer supporting the Southern, Central, Western, or Northern lobes of the Put River Sandstone. Gas Coning I Under-Running There are no indications of a free gas column in the Southern or Central lobes of the Put River Sandstone; therefore, coning or under-run mechanisms are not anticipated. The Western and Northern lobes are gas condensate reservoirs. Development Planning A reservoir model is being constructed to evaluate development options. 13/44 Prudhoe Oil Pool Rules & Area .ion Order No. 4C Amendment Application . Aug. 11, 2005 Development Options Development options being evaluated for the Put River Sandstone include primary depletion, waterflood, and miscible gas flood. Primary Recovery The primary recovery mechanism is solution gas drive. Material balance calculations for the Southern and Central lobes of the Put River Sandstone indicate that primary depletion would recover approximately 10% of the STOOIP. Waterflood Waterflood is being evaluated for the Southern lobe of the Put River Sandstone to detennine incremental recovery and feasibility. Enhanced Oil Recovery (EOR) Miscible gas flooding is also being evaluated for the Southern lobe of the Put River Sandstone to detennine incremental recovery and feasibility. Development Plan Put River Sandstone development is envisioned to include approximately one to five production wells in the Southern lobe with one to five injection wells. Options for the Central lobe include producing via primary depletion by recompleting existing wells. Plans for the Western lobe include potentially one to three production wells. The GOR of the Northern lobe is currently above marginal; therefore, no development is currently planned. The production wells may be completed by perforating the Put River Sandstone In existing wells or drilling sidetracks into the Put River Sandstone. Well Spacing Well spacing will be irregular with well locations determined considering local faulting and reservoir stratigraphy. 14/44 Prudhoe Oil Pool Rules & Ar.tion Order No. 4C Amendment Application . Aug. 11, 2005 Reservoir Management Strategy Pressure support during primary depletion will be provided from solution gas drive. If watertl.ood is undertaken, the voidage replacement ratio (VRR) will be maintained near 1.0 Reservoir management will be a dynamic process. The initial strategy will be derived from model studies and well test information. Development well results will increase knowledge and improve predictive capabilities resulting in potential adjustments to the initial strategy. The reservoir management strategy will continue to be evaluated throughout reservoir life. 15/44 Prudhoe Oil Pool Rules & Are.tion Order No. 4C Amendment Application e Aug. 11, 2005 III. Facilities General Overview The Put River Sandstone will be developed from existing pads and facilities within the Prudhoe Bay field. Drill Pads and Roads The Put River Sandstone is located primarily in the area of Drill Sites 1, 2, 6, 15, and 18. No additional pads or roads are required for Put River Sandstone development. Pad Facilities and Operations The Put River Sandstone development will utilize existing production and injection facilities. Water for a potential waterflood operation would be delivered from the existing 8" seawater injection supply line at Drillsite #1. Estimates indicate the line is sufficient to deliver water to the Put River Sandstone injection wells at 2600 psi. Flow Stations No modifications to the existing flow stations will be required. 16/44 Prudhoe Oil Pool Rules & Are.ion Order No. 4C Amendment Application . Aug. 11, 2005 IV. Well Operations Existing Wells Five wells have been completed in the Put River Sandstone and are described in the "Well Performance" section. The test information is attached in Exhibit II-8. Drilling and Well Design Well Design and Completions All Put River Sandstone wells will be designed to the same specifications as current Prudhoe Oil Pool well designs. Idle wells currently completed in the Ivishak Formation may be used for Put River Sandstone development provided they meet the Put River Sandstone needs and contain adequate cement and mechanical integrity. Injectors may be pre-produced prior to converting to permanent injection. Production from these wells could improve their injectivity and be used to evaluate reservoir productivity, connectivity and pressure response, enabling refinement of current reservoir models and depletion plans. Surface Safety Valves Surface safety valves (SSV) will be included in the wellhead equipment for Put River Sandstone wells. Testing of SSV s will be in accordance with AOGCC requirements. Subsurface Safety Valves In light of developments in oil field technology, controls and experience in operating in the arctic environment, the Commission has eliminated SSSV requirements from pool rules for the Prudhoe Oil Pool (Conservation Order 363). If gas or miscible injectant (MI) injectors are drilled, subsurface safety valves (SSSV) will be installed on those wells. All well completions will be equipped with a nipple profile at a depth just below the base permafrost, should the need arise to install a downhole flow control device or pressure operated safety valves for future MI service or during maintenance operations. Drilling Fluids Drilling fluids will be similar to current fluids used in the Prudhoe Oil Pool. 17/44 Prudhoe Oil Pool Rules & Area.on Order No. 4C Amendment Application . Aug. 11, 2005 Stimulation Methods Stimulation to enhance production or injection capability is an option for Put River Sandstone wells. Fracture stimulation, acid, or other forms of stimulation may be performed as needed in the future. Reservoir Surveillance Program Reservoir surveillance data will be collected as needed to monitor reservoir performance. 18/44 Prudhoe Oil Pool Rules & Area .on Order No. 4C Amendment Application . Aug. 11, 2005 v. Area Injection Operations All injection operations will comply with the current injection operation requirements set forth in Area Injection Order No. 4C. 19/44 . Prudhoe Oil Pool Rules & Areaection Order No. 4C Amendment Application . Aug. 11, 2005 VI. Proposed Amendment to Prudhoe Oil Pool Rule BP Exploration (Alaska) Inc., in its capacity as Prudhoe Bay Unit Operator, respectfully requests that the Commission amend the Pool Definition for the Prudhoe Oil Pool in Conservation Order 341D as described below: Rule 1: Pool Definition (a) The Prudhoe Oil Pool is defined as the accumulations of oil that are common to and which correlate with the accumulations found in the Atlantic Richfield - Humble Prudhoe Bay State No.1 well between the depths of 8,110 feet and 8,680 feet and shall also include the Put River Sandstone, which is that sandstone interval that correlates with the interval 9,638 to 9,719 measured feet on the Borehole Compensated Sonic Log, Run 2, dated September 28, 1975, in the Atlantic Richfield-Exxon NGI No.1 well. 20/44 Prudhoe Oil Pool Rules & Area_non Order No. 4C Amendment Application . Aug. 11, 2005 . VII. Proposed Amendment to Area Injection Order No. 4C BP Exploration (Alaska) Inc., in its capacity as Prudhoe Bay Unit Operator, respectfully requests that the Commission expand the authorized injection strata. for the Prudhoe Oil Pool in Area Injection Order Number 4C as described below: Rule 1: Authorized Injection Strata for Enhanced Recovery Within the affected area, authorized fluids may be injected for purposes of pressure maintenance and enhanced recovery into strata defined as follows: For the Prudhoe Oil Pool strata which correlate with and are common to the fonnations found in the ARCO Prudhoe Bay State No.1 well between the measured depths of 8,110- 8,680 feet and shall also include the Put River Sandstone, which is that sandstone interval that correlates with the interval 9,638 to 9,719 measured feet on the Borehole Compensated Sonic Log, Run 2, dated September 28, 1975, in the Atlantic Richfield- Exxon NGI No.1 well. 21/44 Prudhoe Oil Pool Rules & Areaetion Order No. 4C Amendment Application . Aug. 11, 2005 VIII. List of Exhibits 1-1 Put River Sandstone Location Map 1-2 Put River Sandstone Type Log (well NGI-1) 1-3 Stratigraphic Cross Section of Put River interval 1-4 Gross Sandstone Map for Put River Sandstone 1-5 15-09A Put River Sandstone Well Log 1-6 2-14 Put River Sandstone Well Log and Cored Interval 1-7 15-14A Put River Sandstone Well Log and Sidewall Core Points 1-8 NGI-07 Put River Sandstone Well Log and Cored Interval 1-9 Structure Map of Top Put River Interval 1-10 North-South Structural Cross Section 1-11 Strike-Oriented Structural Cross Section II-I Put River Sandstone Porosity-Permeability Crossplot II-2 Net Pay Map of the Southern lobe II-3 Net Pay Map of the Central lobe II-4 Net Pay Map of the Western lobe II-5 Net Pay Map of the Northern lobe II-6 Fluid Properties Summary II-7 Summary of Fluid Type, Pressures, and Temperatures II-8A 2-23A Production Test Results II-8B 15-09A Production Test Results II-8C 15-41B Production Test Results II-8D 18-27C Production Test Results 22/44 '1:ì '"' ¡:: ¡:¡. š '" o =: 'Jì ;i. ~ ¡:;: fr '" Ro ,- z>/i.. ~.~ '>!~.....,' ~~ ~<. 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Pool Rules " . õ Aug, 200S No, 4C Aml.'ndml.'nt Dat~ T@tal Gas Put Rver mmdd mmdd mmdd 26..oGt~04 1 2.50 fila 378 237 2.96 250 219 2.50 359 284 0 2.50 1143 366 test , . t Prudl!oe Pool No. Amendment Application Aug. 2005 Non.Gas Pn;I!:lIctì<:m 2·Apr 3·Apr - 4·Apr 5·A¡:¡r Date Oillù,,,, Water Rate, T utal Gas, Ga~ Lift, Put Rver FTP, psi b~l,,:t mmcfd mmcfd Gas, ¡lIImdd 5.88 3.38 523 0 2.50 392 1.39 348 3.80 545 3.80 Q 378 389 1.88 389 390 382 367 3tH test '" f'rmlhoe Rules Nil. Amendment Applicatioll 20115 1 .. '" 'Z ~ ;N 0., R .... Water Rate, i< ate, "'IIP" Gas Rat;:, num:fd FTP, 577 2055 2346 6J32 2392 3.84 2346 test