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Home My WebLink AboutCO 827CONSERVATION ORDER 827 Prudhoe Bay Field, Prudhoe Bay Unit Milne Point Field, Milne Point Unit Nikaitchuq Field, Nikaitchuq Unit Oooguruk Field, Oooguruk Unit Endicott Field, Duck Island Unit Northstar Field, Northstar Unit 1. May 7, 2025 Sundry Matrices for Northstar Units email 2. May 19, 2025 Sundry Matrices Email 3. June 29, 2025 Notice of Public Hearing 4. June 30, 2025 Notice of Public Hearing Revised STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION 333 W. 7th Avenue Anchorage, Alaska 99501 Re: Order creating a single sundry matrix waiving and modifying certain requirements of 20 AAC 25.280 concerning Well Work Operations, Sundry Application and Reporting Requirements for multiple Hilcorp operated North Slope fields. ) ) ) ) ) ) ) ) ) ) Conservation Order 827 Prudhoe Bay Field, Prudhoe Bay Unit Milne Point Field, Milne Point Unit Nikaitchuq Field, Nikaitchuq Unit Oooguruk Field, Oooguruk Unit Endicott Field, Duck Island Unit Northstar Field, Northstar Unit September 4, 2025 IT APPEARING THAT: 1. Multiple conservation orders are currently in effect for separate Hilcorp1 operated North Slope fields, defining separate and differing sundry matrices that waive and modify certain requirements of 20 AAC 25.280. 2. The following conservation orders and their associated sundry matrices are field specific, applying to production and injection wells within each field’s included units and underlying oil pools: Conservation Order 556A (CO 556A) Prudhoe Bay Field Prudhoe Bay Unit (PBU) Prudhoe Bay Oil Pool Pt. McIntyre Oil Pool Stump Island Oil Pool Lisburne Oil Pool Niakuk Oil Pool West Beach Oil Pool North Prudhoe Bay Oil Pool Midnight Sun Oil Pool Aurora Oil Pool Borealis Oil Pool Polaris Oil Pool Schrader Bluff Oil Pool Raven Oil Pool Put River Oil Pool 1 “Hilcorp” refers to both Hilcorp North Slope, LLC and Hilcorp Alaska, LLC, without differentiation. “Hilcorp North Slope, LLC” and “Hilcorp Alaska, LLC” each specify individual operator entities. Conservation Order 827 September 4, 2025 Page 2 of 6 Conservation Order 347A (CO 347A) Milne Point Field Milne Point Unit (MPU) Kuparuk River Oil Pool Schrader Bluff Oil Pool Sag River Oil Pool Conservation Order 815 (CO 815) Nikaitchuq Field Nikaitchuq Unit (NU) Nikaitchuq Schrader Bluff Oil Pool Conservation Order 814 (CO 814) Oooguruk Field Oooguruk Unit (OU) Oooguruk-Kuparuk Oil Pool Oooguruk-Nuiqsut Oil Pool Oooguruk-Torok Oil Pool Conservation Order 297A (CO 297A) Endicott Field Duck Island Unit (DIU) Endicott Oil Pool Eider Oil Pool Ivishak Oil Pool Alapah Oil Pool 3. Conservation orders defining sundry matrices do not exist for Northstar Field/Unit or for Pt. Thomson Field/Unit. 4. CO 556A applies to Hilcorp North Slope, LLC. CO 814 and CO 815 apply to Hilcorp Alaska, LLC. CO 347A and CO 297A have not been amended to apply to Hilcorp Alaska, LLC, the current operator of the MPU and DIU. 5. It is recognized by both Hilcorp and the Alaska Oil and Gas Conservation Commission (AOGCC) that differences between the matrices provide unnecessary complexity and possible confusion during Forms 10-403 and 10-404 submittals and review. 6. Hilcorp requested that a single sundry matrix be developed that applies equally to all Hilcorp operated North Slope fields. 7. Pursuant to 20 AAC 25.540, the AOGCC tentatively scheduled a public hearing for September 25, 2025. On July 30, 2025, the AOGCC published notice of the opportunity for that hearing on the State of Alaska’s Online Public Notice website and on the AOGCC’s website and electronically transmitted the notice to all persons on the AOGCC’s email distribution list. On August 3, 2025, the AOGCC published the notice in the Anchorage Daily News. 8. No written comments were filed with the AOGCC, and no request for a hearing was made. 9. The tentatively scheduled hearing was vacated. 10. AOGCC’s records provide sufficient information upon which to make an informed decision. Conservation Order 827 September 4, 2025 Page 3 of 6 FINDINGS: 1. Under 20 AAC 25.280(a) operators are required to file an Application for Sundry Approvals (Form 10-403) and receive approval prior to performing well workovers (i.e., perforating or reperforating casing, stimulation, pulling tubing, altering casing, and repairing wells) on any well. 2. Under 20 AAC 25.280(d) operators are required to file a Report of Sundry Well Operations (Form 10-404), including supporting documentation, within 30 days after completing workover operations. 3. Work within the production casing/liner or the production tubing is generally standard and routine in development (production) and service (injection) wells. However, some routine work within service (injection) wells requires additional monitoring due to the requirements of the Underground Injection Control (UIC) Program delegated to the AOGCC by the Environmental Protection Agency (EPA). 4. Alteration of casing which provides a physical barrier between the wellbore and the subsurface formations in development (production) and service (injection) wells is not routine and does not warrant waiving the requirement of advance approval. 5. Service (injection) well workover operations frequently call for additional scrutiny, including mechanical integrity tests and cement quality logs. 6. The attached “Well Work Operations, Sundry Application and Reporting Requirements, Sundry Matrix, Conservation Order 827, Operator: Hilcorp Alaska, LLC, Hilcorp North Slope, LLC” (Attachment) sets forth the sundry application reporting requirements applicable to various types of workover operations in the included fields, as mentioned above and as detailed below. CONCLUSIONS: 1. A single sundry matrix that applies to multiple Hilcorp operated North Slope fields will simplify reporting and reviewing requirements. 2. Modifying or waiving the requirements of 20 AAC 25.280(a) for development (production) wells in the included fields is based on sound engineering and geoscience principles, will not promote waste, jeopardize correlative rights, or result in an increased risk of fluid movement into freshwater. 3. Modifying or waiving the requirements of 20 AAC 25.280(a) for service (injection) wells in the included fields is based on sound engineering and geoscience principles, will not promote waste, jeopardize correlative rights, or result in an increased risk of fluid movement into freshwater. 4. Modifying or waiving the requirements of 20 AAC 25.280(a) for service (injection) wells in the included fields comports with the requirements of the Class II UIC program. 5. Increased regulatory scrutiny for any well with compromised ability to contain pressure is appropriate. Conservation Order 827 September 4, 2025 Page 4 of 6 6. Increased regulatory scrutiny for work to repair casing (20 AAC 25.280(a)(4)) is appropriate. 7. The Attachment sets out the sundry approval and reporting requirements for frequently performed well operations in the included fields. 8. The AOGCC does not grant or apply a sundry matrix for Pt. Thomson Field / Unit at this time. 9. Northstar Unit (NSU) wells falling under federal jurisdiction are not covered by this conservation order and thus will have no sundry matrix applied/granted. NOW, THEREFORE IT IS ORDERED: This conservation order hereby rescinds Conservation Order 556A, dated June 12, 2018. This conservation order hereby rescinds Conservation Order 347A, dated July 29, 2005. This conservation order hereby rescinds Conservation Order 297A, dated July 29, 2005. This conservation order hereby rescinds Conservation Order 814 and its associated Administrative Approval CO 814.001. This conservation order hereby rescinds Conservation Order 815 and its associated Aministrative Approval CO 815.001. The following rules apply to the affected areas established in Conservation Order 341J (Prudhoe Bay Oil Pool), Conservation Order 317C (Pt. McIntyre Oil Pool), Conservation Order 207E (Lisburne Oil Pool), Conservation Order 329C (Niakuk Oil Pool), Conservation Order 570A (Raven Oil Pool), Conservation Order 311C (West Beach Oil Pool), Conservation Order 345 (North Prudhoe Bay Oil Pool), Conservation Order 452 (Midnight Sun Oil Pool), Conservation Order 317C (Stump Island Oil Pool), Conservation Order 457B (Aurora Oil Pool), Conservation Order 471 (Borealis Oil Pool), Conservation Order 505C (Schrader Bluff Oil Pool), Conservation Order 484A (Polaris Oil Pool), Conservation Order 559A (Put River Oil Pool), Conservation Order 816 (Milne Point Kuparuk River Oil Pool), Conservation Order 477B (Milne Point Schrader Bluff Oil Pool), Conservation Order 423 (Milne Point Sag River Oil Pool), Conservation Order 596 (Oooguruk-Kuparuk Oil Pool), Conservation Order 597 (Oooguruk-Nuiqsut Oil Pool), Conservation Order 645A (Oooguruk-Torok Oil Pool), Conservation Order 462 (Endicott Oil Pool), Conservation Order 449 (Eider Oil Pool), Conservation Order 275 (Duck Island Unit Ivishak Oil Pool and Duck Island Unit Alapah Oil Pool), and the affected area of Conservation Order 458A (Northstar Oil Pool) in which wells are not jointly permitted between the state and BSSE or BOEM. Rule 1 Except as provided in Rules 5, 6, and 7, submission of an Application for Sundry Approvals (Form 10-403) and supporting documentation for workover activities described in 20 AAC 25.280(a) is waived or modified for development (production) wells, as provided in the Attachment. Conservation Order 827 September 4, 2025 Page 5 of 6 Rule 2 Except as provided in Rules 5, 6, and 7, submission of a Report of Sundry Well Operations (Form 10-404) and supporting documentation for workover activities described in 20 AAC 25.280(d) is waived or modified for development (production) wells, as provided in the Attachment. Rule 3 Except as provided in Rules 5, 6, and 7, submission of an Application for Sundry Approvals (Form 10-403) and supporting documentation for workover activities described in 20 AAC 25.280(a) is waived or modified for service (injection) wells, as provided in the Attachment. Rule 4 Except as provided in Rules 5, 6, and 7, submission of a Report of Sundry Well Operations (Form 10-404) and supporting documentation for workover activities described in 20 AAC 25.280(d) is waived or modified for service (injection) wells, as provided in the Attachment. Rule 5 The waivers provided under Rules 1 and 2 above do not apply to wells that are required to be reported to the AOGCC under the provisions of the sustained casing pressure rules in Conservation Order 492A, Conservation Order 503, Conservation Order 570A, Conservation Order 496, Conservation Order 501, Conservation Order 477B Errata, Conservation Order 596, Conservation Order 597, Conservation Order 645A, and Conservation Order 502. Rule 6 The AOGCC reserves the right to require an Application for Sundry Approvals for a particular well or for a particular operation on any well. Rule 7 If the Attachment (sundry matrix) is in conflict with any AOGCC issued Administrative Approval for a particular well or set of wells, the Administrative Approval requirements will take precedence. Rule 8 The Attachment summarizing the sundry approval and reporting requirements applies to operations in the specific well types. Rule 9 Nothing in this order precludes the operator from filing an Application for Sundry Approvals (Form 10-403) in advance of any well work. Rule 10 Nothing in this order precludes the operator from filing a Report of Sundry Well Operations (Form 10-404) following any well work. Rule 11 The Attachment applies while Hilcorp is the operator of the PBU, MPU, NU, OU, DIU, and NSU. Conservation Order 827 September 4, 2025 Page 6 of 6 Rule 12 No change of operator will be effective until the current operator requests the AOGCC to amend this order to change the name of the operator and the AOGCC approves the required designation of operator form. DONE at Anchorage, Alaska and dated September 4, 2025. Jessie L. Chmielowski Gregory C. Wilson Commissioner Commissioner RECONSIDERATION AND APPEAL NOTICE As provided in AS 31.05.080(a), within 20 days after written notice of the entry of this order or decision, or such further time as the AOGCC grants for good cause shown, a person affected by it may file with the AOGCC an application for reconsideration of the matter determined by it. If the notice was mailed, then the period of time shall be 23 days. An application for reconsideration must set out the respect in which the order or decision is believed to be erroneous. The AOGCC shall grant or refuse the application for reconsideration in whole or in part within 10 days after it is filed. Failure to act on it within 10-days is a denial of reconsideration. If the AOGCC denies reconsideration, upon denial, this order or decision and the denial of reconsideration are FINAL and may be appealed to superior court. The appeal MUST be filed within 33 days after the date on which the AOGCC mails, OR 30 days if the AOGCC otherwise distributes, the order or decision denying reconsideration, UNLESS the denial is by inaction, in which case the appeal MUST be filed within 40 days after the date on which the application for reconsideration was filed. If the AOGCC grants an application for reconsideration, this order or decision does not become final. Rather, the order or decision on reconsideration will be the FINAL order or decision of the AOGCC, and it may be appealed to superior court. That appeal MUST be filed within 33 days after the date on which the AOGCC mails, OR 30 days if the AOGCC otherwise distributes, the order or decision on reconsideration. In computing a period of time above, the date of the event or default after which the designated period begins to run is not included in the period; the last day of the period is included, unless it falls on a weekend or state holiday, in which event the period runs until 5:00 p.m. on the next day that does not fall on a weekend or state holiday. Gregory C Wilson Digitally signed by Gregory C Wilson Date: 2025.09.04 12:17:20 -08'00' Jessie L. Chmielowski Digitally signed by Jessie L. Chmielowski Date: 2025.09.04 14:38:01 -08'00' Well Work OperationsSundry Application and Reporting RequirementsSundry MatrixConservation Order 827Operator: Hilcorp Alaska, LLC, Hilcorp North Slope, LLCSeptember 4, 2025 Lists in bold are detailed on the last page. Not applicable to Northstar wells under federal jurisdiction. Not applicable to Pt Thompson wells.• Stim gun / stim tube• Cut tailpipe• Pumping Operations List• Remedial Cement List• Mechanical Completions List• Coil extended length perforating• Remedial Cement List• Openhole deployment operations• Casing Alterations List• Rig nitrogen operations• Repair wellhead/tree pack off with sealant material • Well suspension or suspension renewal• Surface casing by conductor annulus corrosion inhibitor4• Change of SSV location from vertical run to wing• Conduct suspended well inspection (initial & subsequent) • Major wellhead welding or modifcations, even if temporary• Operations Shutdown (Drilling/Completions Operations)• Conductor cutaways and conductor extensions• Top job on surface casing by conductor annulus• Attach furmanite to wellhead • Plug for redrill• Surface casing welding repairs • Unmanned flowbacks• Install or remove permanent downhole choke• Repair weld on starting head/bradenhead connectionsDEVELOPMENT [PRODUCTION] WELLS(1)NO FORMS REQUIRED10-404 Not RequiredTHRU-TUBING OPERATIONS• Surveys List2 FORMS REQUIRED1 FORM REQUIRED• Production/Injection Control ListTag FillTHRU-TUBING OPERATIONSTHRU-TUBING OPERATIONS10-404 / 407 Required10-404 / 407 RequiredOTHER OPERATIONS OTHER OPERATIONSRIG/COIL OPERATIONS(1) On a case-by-case basis, a 10-403 will be required for a particular well or operation if the AOGCC requests it. The operator should consult with the AOGCC to determine if a 10-403 is needed.(2) A Form 10-403 is not required if initial perforations are included in a Form 10-401 Permit to Drill.(3) Context: anytime production is switched from one pool to another or existing production is commingled with that from an additional pool.(4) Can be submitted via spreadsheet annually, else a Form 10-404 is required. RIG/COIL OPERATIONSRIG/COIL OPERATIONS• Shift sliding sleeve for production from another pool310-403 Not Required 10-403 Not RequiredOTHER OPERATIONS• Replace/Repair Xmax tree or wellhead valve • Inject polymer for profile improvement• Gel squeeze for profile improvement• Convert producer to injector• Proppant or Acid Fracture Stimulation10-403 Required• K-valve installation (initial or redesign)• Log List• Artificial Lift• Set whipstock for sidetrack or lateral • Install permanent tubing patchPUMPING OPERATIONS, INCLUDING USING COILPUMPING OPERATIONS, INCLUDING USING COIL• Polymer/Resin Repair listPUMPING OPERATIONS, INCLUDING USING COIL• Acid stimulation (HCl, Mud acid, etc) -Non-fracture stimulation• Squeeze/plug to control fluid movement in-pool• Perforate / access a new pool, initial perforations2, commingle production between pools, change pools• Perforate interval within a pool• Replace / Swap Liner Top Packer• Install or remove retrievable tubing patch• Initial install or permanent removal of Liner Top Packer• Plug & Abandon / Suspend / Reservoir Pool Abandonment / Lateral or Spoke Abandonment• Run permanent/retrievable scab liner• Dump bail cement for plug to control fluid movement in-pool• Install / Remove mechanical device (plug or packer) to control fluid movement in-poolPage 1 of 3 Well Work OperationsSundry Application and Reporting RequirementsSundry MatrixConservation Order 827Operator: Hilcorp Alaska, LLC, Hilcorp North Slope, LLCSeptember 4, 2025 SERVICE [INJECTION] WELLS(1)(2)• Install/Remove mechanical device (plug or packer) to control • Install/Remove Liner Top Packer • Cut tailpipe or tubing• Run permanent/retrievable scab liner• Pumping Operations List• Squeeze/plug to control fluid movement in-pool• Remedial Cement List• Polymer/Resin Repair list• Proppant or Acid Fracture Stimulation• Acid Stimulation (HCl, Mud Acid, etc)RIG/COIL OPERATIONS• Mechanical Completions List• Coil extended length perforating• Remedial Cement List• Openhole deployment operation• Casing Alterations List• Rig nitrogen operations• MBE treatments• Replace/Repair Xmax tree or wellhead valve• Convert injector to producer7• WI/WAG Swaps, or polymer5 swaps• Well suspension or suspension renewal• Change of SSV location from vertical run to wing• Major wellhead welding or modifcations, even if temporary• Operations Shutdown (Drilling/Completions Operations)• Conductor cutaways and conductor extensions• Top job on surface casing by conductor annulus• Attach furmanite to wellhead • Plug for redrill• Surface casing welding repairs • Unmanned flowbacksTHRU-TUBING OPERATIONS• Surveys List• Inject chemicals for flood profile improvement• Gel squeeze for profile improvement• Perforate interval within a pool• Convert from initial water injector to WAG injector• Dump bail cement for plug to control fluid movement in-pool• Plug & Abandon / Suspend / Reservoir Pool Abandonment / RIG/COIL OPERATIONS RIG/COIL OPERATIONS• Waterflood regulator initial installation8 or injection into another pool910-404 / 407 Required10-403 Not Required10-404 / 407 Required10-404 Not Required• Install or remove retrievable or permanent tubing patch• Perforate / access a new pool, initial perforations3, commingle injection between pools, change pools• Shift sliding sleeve for injection into another pool9• Install or remove permanent downhole chokeTHRU-TUBING OPERATIONS10-403 Required10-403 Not RequiredTHRU-TUBING OPERATIONSNO FORMS REQUIRED 1 FORM REQUIRED 2 FORMS REQUIRED(2) Operations on disposal wells: operator must contact AOGCC to determine Sundries required. (3) A Form 10-403 is not required if initial perforations are included in a Form 10-401 Permit to Drill. (4) Max 5x wellbore volume per month. Can be submitted via spreadsheet every 6 months, else a Form 10-404 is required. (5) Only applicable to pools where polymer flooding has been approved in AIO or by AIO Administrative Approval (6) Can be submitted via spreadsheet annually, else a Form 10-404 is required.(7) Not associated with initial flowback of <30 days, or if producing via jet pump(8) A Form 10-403 is not required if the initial WFR installation is included in a Form 10-401 Permit to Drill.(9) Context: anytime injection is switched from one pool to another or existing injection is commingled with an additional pool. Lateral or Spoke abandonment• Set whipstock for sidetrack or lateral• Stim gun / stim tubePUMPING OPERATIONS, INCLUDING USING COIL• General Well Work List• Log List• Production/Injection Control List fluid movement in-pool• Water wash gas injector4PUMPING OPERATIONS, INCLUDING USING COIL PUMPING OPERATIONS, INCLUDING USING COIL• Repair weld on Starting head/Bradenhead connections• Convert injector to producer if flowing back more than 30 days (for initial flowback only), except for producing via jet pump(1) On a case-by-case basis, a 10-403 will be required for a particular well or operation if the AOGCC requests it. The operator should consult with the AOGCC to determine if a 10-403 is needed.• Conduct suspended well inspection (initial & subsequent)• Surface casing by conductor annulus corrosion inhibitor6• Repair wellhead/tree pack off with sealant materialOTHER OPERATIONS OTHER OPERATIONS OTHER OPERATIONSPage 2 of 3 Well Work OperationsSundry Application and Reporting RequirementsSundry MatrixConservation Order 827Operator: Hilcorp Alaska, LLC, Hilcorp North Slope, LLCSeptember 4, 2025 Sundry Application / Reporting Requirements: 10-403 Not Required, 10-404 Not RequiredGeneral Well Work: Surveys: Well Logs: Production/Injection: Artificial Lift: Pumping Operations:Tag Fill Pressure (CNL) Compensated Neutron Waterflood Regulator changeout Change GLV ScaleSet or pull retrievable plugs Temperature (TDT) Thermal Decay Time / redesign (in-pool) Change downhole pump/ Sludge to secure wells not in zone Spinner (CO) Carbon Oxygen Shift Sliding Sleeve (in-pool) (jetpump/ESP)Ice PlugRun dummy drift or gauge ring Obtain bottom hole sample (CCL) Casing Collar LocatorAVA Nipple Install/remove packoff/patch Freeze protectPunch tubing Gyro Cement Evaluation Production Mandrel GLMInhibitor squeezeDump or bail sand/ sluggits Production/Injection profile Temperature Reperforate existing interval Perform hot oil treatmentTubing scrapes (scale,PressureIsolation sleeve regulator Acidize Tubing paraffin,etc.)Video valve CTU clean outChange GLV Caliper Sand or rockscreen FCO N2Magnet runs Acoustic LDLDisplace well with fluidSet / Retrieve SCSSSV or MC OtherFlowback after stimulation style injection valvesPerform high pressure perf Install/remove retrievable breakdown downhole chokeNitrogen lift pressure testBooster pump in conductorSchmoo-B-GoneSundry Application / Reporting Requirements: 10-403 Required, 10-404/407 RequiredRemedial Cement: Polymer/Resin: Mechanical Completion (Rig/coil): Casing Alterations (Rig/coil):Casing Shoe Micro-annulus Down Squeeze Tubing Casing patchMicro-annulus Down Squeeze Pressure Activated Sealant Mill Packer Straddle packerIA Cement Squeeze Gel Squeeze repairs Velocity String Subsidence repairOA Cement Squeeze ESP completion Replace casingRemedial casing or liner Jet pump completion Scab liner cementing PCP completion TiebacksGravel Pack or Sand Screen Stacker packerPage 3 of 3 From:Coldiron, Samantha J (OGC) To:AOGCC_Public_Notices Subject:[AOGCC_Public_Notices] Conservation Order 827 (Hilcorp) Date:Thursday, September 4, 2025 3:16:27 PM Attachments:CO827.pdf Order creating a single sundry matrix waiving and modifying certain requirements of 20 AAC 25.280 concerning Well Work Operations, Sundry Application and Reporting Requirements for multiple Hilcorp operated North Slope fields. Samantha Coldiron AOGCC Special Assistant Alaska Oil and Gas Conservation Commission 333 West 7th Avenue Anchorage, AK 99501 (907) 793-1223 __________________________________ List Name: AOGCC_Public_Notices@list.state.ak.us You subscribed as: samantha.coldiron@alaska.gov Unsubscribe at: https://list.state.ak.us/mailman/options/aogcc_public_notices/samantha.coldiron%40alaska.go v 4 Notice of Public Hearing STATE OF ALASKA Alaska Oil and Gas Conservation Commission Re: Docket Number: CO-25-014 Sundry Application and Reporting Requirements for Well Work Operations On its own motion the Alaska Oil and Gas Conservation Commission (AOGCC) will hold a hearing to propose a Conservation Order creating a single sundry matrix waiving and modifying certain requirements of 20 AAC 25.280 Workover Operations, concerning Applications for Sundry Approvals and Reports of Sundry Well Operations for wells in the following fields and pools: Prudhoe Bay Field, Prudhoe Bay Oil Pool Prudhoe Bay Field, Pt. McIntyre Oil Pool Prudhoe Bay Field, Stump Island Oil Pool Prudhoe Bay Field, Lisburne Oil Pool Prudhoe Bay Field, Niakuk Oil Pool Prudhoe Bay Field, West Beach Oil Pool Prudhoe Bay Field, North Prudhoe Bay Oil Pool Prudhoe Bay Field, Midnight Sun Oil Pool Prudhoe Bay Field, Aurora Oil Pool Prudhoe Bay Field, Borealis Oil Pool Prudhoe Bay Field, Polaris Oil Pool Prudhoe Bay Field, Schrader Bluff Oil Pool Prudhoe Bay Field, Raven Oil Pool Prudhoe Bay Field, Put River Oil Pool Milne Point Field, Kuparuk River Oil Pool Milne Point Field, Schrader Bluff Oil Pool Milne Point Field, Sag River Oil Pool Nikaitchuq Field, Schrader Bluff Oil Pool Oooguruk Field, Oooguruk-Kuparuk Oil Pool Oooguruk Field, Oooguruk-Nuiqsut Oil Pool Oooguruk Field, Oooguruk-Torok Oil Pool Endicott Field, Endicott Oil Pool Endicott Field, Eider Oil Pool Endicott Field, Ivishak Oil Pool Endicott Field, Alapah Oil Pool Northstar Field, Northstar Oil Pool A public hearing on the matter has been tentatively scheduled for September 25, 2025, at 10:00 a.m. The hearing, which may be changed to full virtual, if necessary, will be held in the AOGCC hearing room located at 333 West 7th Avenue, Anchorage, AK 99501. The audio call in information is (907) 202 7104 Conference ID: 197 432 595#. Anyone who wishes to participate remotely using MS Teams video conference should contact Ms. Coldiron at least two business days before the scheduled public hearing to request an invitation for the MS Teams. To request that the tentatively scheduled hearing be held, a written request must be filed with the AOGCC no later than 4:30 p.m. on August 15, 2025. If a request for a hearing is not timely filed, the AOGCC may issue an order without a hearing. To learn if the AOGCC will hold the hearing, call (907) 793-1223 after August 18, 2025. In addition, written comments regarding this application may be submitted to the AOGCC, at 333 west 7th Avenue, Anchorage, AK 99501 or samantha.coldiron@alaska.gov. Comments must be received no later than 4:30 p.m. on August 28, 2025, except that, if a hearing is held, comments must be received no later than the conclusion of the September 25, 2025, hearing. If, because of a disability, special accommodations may be needed to comment or attend the hearing, contact Samantha Coldiron, at (907) 793-1223, no later than September 17, 2025. Jessie L. Chmielowski Gregory C. Wilson Commissioner Commissioner Gregory C. Wilson Digitally signed by Gregory C. Wilson Date: 2025.07.30 08:14:26 -08'00' Jessie L. Chmielowski Digitally signed by Jessie L. Chmielowski Date: 2025.07.30 08:21:33 -08'00' From:Coldiron, Samantha J (OGC) To:AOGCC_Public_Notices Subject:Re: [AOGCC_Public_Notices] Public Hearing Notice (Hilcorp) Date:Thursday, July 31, 2025 7:45:11 AM Attachments:CO-25-014 Public Hearing Notice Hilcorp Sundry Matrix revised.pdf Please see revised hearing notice. Added Nikaitchuq Field, Schrader Bluff Oil Pool Regards, Samantha Coldiron AOGCC Special Assistant (907) 793-1223 From: Coldiron, Samantha J (OGC) Sent: Tuesday, July 29, 2025 9:50 AM To: AOGCC_Public_Notices <aogcc_public_notices@list.state.ak.us> Subject: Public Hearing Notice (Hilcorp) Docket Number: AEO-25-002 Hilcorp Alaska, LLC Application for Revision of Aquifer Exemption Order 2, Milne Point Field, Milne Point Unit, North Slope Borough, Alaska Samantha Coldiron AOGCC Special Assistant Alaska Oil and Gas Conservation Commission 333 West 7th Avenue Anchorage, AK 99501 (907) 793-1223 __________________________________ List Name: AOGCC_Public_Notices@list.state.ak.us You subscribed as: samantha.coldiron@alaska.gov Unsubscribe at: https://list.state.ak.us/mailman/options/aogcc_public_notices/samantha.coldiron%40alaska.go v Lisi Misa being first duly sworn on oath deposes and says that she is a representative of the An- chorage 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 afore- said 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 AFFIDAVIT OF PUBLICATION ______________________________________ Notary Public in and for The State of Alaska. Third Division Anchorage, Alaska MY COMMISSION EXPIRES ______________________________________ 08/03/2025 and that such newspaper was regularly distrib- uted 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________________________________ Subscribed and sworn to before me Account #: 100869 ST OF AK/AK OIL AND GAS CONSERVATION COMMISSION333 W. 7TH AVE STE 100, ANCHORAGE, AK 99501 Order #: W0054241 Cost: $383.22 Notice of Public HearingSTATE OF ALASKA Alaska Oil and Gas Conservation Commission Re: Docket Number: CO-25-014 Sundry Application and Reporting Requirements for Well Work Operations On its own motion the Alaska Oil and Gas Conservation Commission (AOGCC) will hold a hearing to propose a Conservation Order creating a single sundry matrix waiving and modifying certain requirements of 20 AAC 25.280 Workover Operations, concerning Applications for Sundry Approvals and Reports of Sundry Well Operations for wells in the following fields and pools:Prudhoe Bay Field, Prudhoe Bay Oil PoolPrudhoe Bay Field, Pt. McIntyre Oil Pool Prudhoe Bay Field, Stump Island Oil PoolPrudhoe Bay Field, Lisburne Oil PoolPrudhoe Bay Field, Niakuk Oil Pool Prudhoe Bay Field, West Beach Oil PoolPrudhoe Bay Field, North Prudhoe Bay Oil PoolPrudhoe Bay Field, Midnight Sun Oil Pool Prudhoe Bay Field, Aurora Oil PoolPrudhoe Bay Field, Borealis Oil PoolPrudhoe Bay Field, Polaris Oil Pool Prudhoe Bay Field, Schrader Bluff Oil PoolPrudhoe Bay Field, Raven Oil PoolPrudhoe Bay Field, Put River Oil Pool Milne Point Field, Kuparuk River Oil PoolMilne Point Field, Schrader Bluff Oil PoolMilne Point Field, Sag River Oil Pool Nikaitchuq Field, Schrader Bluff Oil PoolOooguruk Field, Oooguruk-Kuparuk Oil PoolOooguruk Field, Oooguruk-Nuiqsut Oil PoolOooguruk Field, Oooguruk-Torok Oil PoolEndicott Field, Endicott Oil PoolEndicott Field, Eider Oil PoolEndicott Field, Ivishak Oil PoolEndicott Field, Alapah Oil PoolNorthstar Field, Northstar Oil Pool A public hearing on the matter has been tentatively scheduled for September 25, 2025, at 10:00 a.m. The hearing, which may be changed to full virtual, if necessary, will be held in the AOGCC hearing room located at 333 West 7th Avenue, Anchorage, AK 99501. The audio call in information is (907) 202 7104 Conference ID: 197 432 595#. Anyone who wishes to participate remotely using MS Teams video conference should contact Ms. Coldiron at least two business days before the scheduled public hearing to request an invitation for the MS Teams. To request that the tentatively scheduled hearing be held, a written request must be filed with the AOGCC no later than 4:30 p.m. on August 15, 2025. If a request for a hearing is not timely filed, the AOGCC may issue an order without a hearing. To learn if the AOGCC will hold the hearing, call (907) 793-1223 after August 18, 2025. In addition, written comments regarding this application may be submitted to the AOGCC, at 333 west 7th Avenue, Anchorage, AK 99501 or samantha.coldiron@alaska.gov. Comments must be received no later than 4:30 p.m. on August 28, 2025, except that, if a hearing is held, comments must be received no later than the conclusion of the September 25, 2025, hearing. If, because of a disability, special accommodations may be needed to comment or attend the hearing, contact Samantha Coldiron, at (907) 793-1223, no later than September 17, 2025. Jessie L. Chmielowski Gregory C. WilsonCommissioner Commissioner Pub: Aug. 3, 2025 STATE OF ALASKA THIRD JUDICIAL DISTRICT ______________________________________2025-08-05 2029-01-23 Document Ref: XKF5J-ATYNE-SWWO6-T84MW Page 2 of 35 3 Notice of Public Hearing STATE OF ALASKA Alaska Oil and Gas Conservation Commission Re: Docket Number: CO-25-014 Sundry Application and Reporting Requirements for Well Work Operations On its own motion the Alaska Oil and Gas Conservation Commission (AOGCC) will hold a hearing to propose a Conservation Order creating a single sundry matrix waiving and modifying certain requirements of 20 AAC 25.280 Workover Operations, concerning Applications for Sundry Approvals and Reports of Sundry Well Operations for wells in the following fields and pools: Prudhoe Bay Field, Prudhoe Bay Oil Pool Prudhoe Bay Field, Pt. McIntyre Oil Pool Prudhoe Bay Field, Stump Island Oil Pool Prudhoe Bay Field, Lisburne Oil Pool Prudhoe Bay Field, Niakuk Oil Pool Prudhoe Bay Field, West Beach Oil Pool Prudhoe Bay Field, North Prudhoe Bay Oil Pool Prudhoe Bay Field, Midnight Sun Oil Pool Prudhoe Bay Field, Aurora Oil Pool Prudhoe Bay Field, Borealis Oil Pool Prudhoe Bay Field, Polaris Oil Pool Prudhoe Bay Field, Schrader Bluff Oil Pool Prudhoe Bay Field, Raven Oil Pool Prudhoe Bay Field, Put River Oil Pool Milne Point Field, Kuparuk River Oil Pool Milne Point Field, Schrader Bluff Oil Pool Milne Point Field, Sag River Oil Pool Oooguruk Field, Oooguruk-Kuparuk Oil Pool Oooguruk Field, Oooguruk-Nuiqsut Oil Pool Oooguruk Field, Oooguruk-Torok Oil Pool Endicott Field, Endicott Oil Pool Endicott Field, Eider Oil Pool Endicott Field, Ivishak Oil Pool Endicott Field, Alapah Oil Pool Northstar Field, Northstar Oil Pool A public hearing on the matter has been tentatively scheduled for September 25, 2025, at 10:00 a.m. The hearing, which may be changed to full virtual, if necessary, will be held in the AOGCC hearing room located at 333 West 7th Avenue, Anchorage, AK 99501. The audio call in information is (907) 202 7104 Conference ID: 197 432 595#. Anyone who wishes to participate remotely using MS Teams video conference should contact Ms. Coldiron at least two business days before the scheduled public hearing to request an invitation for the MS Teams. To request that the tentatively scheduled hearing be held, a written request must be filed with the AOGCC no later than 4:30 p.m. on August 15, 2025. If a request for a hearing is not timely filed, the AOGCC may issue an order without a hearing. To learn if the AOGCC will hold the hearing, call (907) 793-1223 after August 18, 2025. In addition, written comments regarding this application may be submitted to the AOGCC, at 333 west 7th Avenue, Anchorage, AK 99501 or samantha.coldiron@alaska.gov. Comments must be received no later than 4:30 p.m. on August 28, 2025, except that, if a hearing is held, comments must be received no later than the conclusion of the September 25, 2025, hearing. If, because of a disability, special accommodations may be needed to comment or attend the hearing, contact Samantha Coldiron, at (907) 793-1223, no later than September 17, 2025. Jessie L. Chmielowski Gregory C. Wilson Commissioner Commissioner Jessie L. Chmielowski Digitally signed by Jessie L. Chmielowski Date: 2025.07.29 14:00:46 -08'00'Gregory C. Wilson Digitally signed by Gregory C. Wilson Date: 2025.07.29 14:08:23 -08'00' From:Coldiron, Samantha J (OGC) To:AOGCC_Public_Notices Subject:[AOGCC_Public_Notices] Public Hearing Notice (Hilcorp) Date:Tuesday, July 29, 2025 2:17:21 PM Attachments:CO-25-014 Public Hearing Notice Hilcorp Sundry Matrix.pdf Docket Number: CO-25-014 Sundry Application and Reporting Requirements for Well Work Operations Samantha Coldiron AOGCC Special Assistant Alaska Oil and Gas Conservation Commission 333 West 7th Avenue Anchorage, AK 99501 (907) 793-1223 __________________________________ List Name: AOGCC_Public_Notices@list.state.ak.us You subscribed as: samantha.coldiron@alaska.gov Unsubscribe at: https://list.state.ak.us/mailman/options/aogcc_public_notices/samantha.coldiron%40alaska.go v 2 CAUTION: This email originated from outside the State of Alaska mail system. Do not click links or open attachments unless you recognize the sender and know the content is safe. From:Wyatt Rivard To:Boman, Wade C (OGC) Subject:RE: [EXTERNAL] sundry matrices email not sent to Wade Boman Date:Monday, May 19, 2025 10:26:44 AM Attachments:PBU Sundry Matrix Comparison vs North Slope and NIK-OOO_5-1-25.pdf CO 814(WNS NIK Sundry Matrix, Same as CO 815 OOO).pdf North Slope (AKI & MPU) Hilcorp Sundry Matrix Master 12-2-2019.pdf Sorry for that. Email below and matrices attached. Hello Wade, Following up on our conversation last month around sundry matrices, we wanted to send something over ahead of next week’s meeting. As discussed, we appreciate and support moving to a standardized Sundry Matrix where possible. I’ve included information below on the matrices that we currently have in use in our North Slope fields along with our understanding of their applicability. I’ve also listed all of the Conservation Orders specific to sundry matrices for our North Slope fields. Lastly, we have reviewed the existing sundry matrices in use and I’ve annotated the attached version of the PBU Sundry Matrix from CO 556A highlighting the differences between our current North Slope fields’ matrices. The differences are generally minor but there are some proposed updates to the PBU CO556A matrix also included below if it is convenient to incorporate any of these changes while orders are already being updated. These are very much opportunistic clarifications or requests and if the AOGCC would prefer to use the existing PBU Matrix, without modification, as the standard then we can manage without these updates. Thank You, Wyatt Current Matrices in Use (Attached for Reference) Currently Hilcorp utilizes three different sundry matrices in our North Slope fields to guide 10- 403 and 10-404 submission PBU Sundry Matrix: The Prudhoe Bay Sundry matrix in use reflects the sundry matrix listed in CO 556A. This sundry matrix became applicable to Hilcorp North Slope, LLC after its change from the former BPXA business unit (interpreted as no legal change in Operatorship). “North Slope Sundry Matrix” considered applicable to MPU, END, NSI & PTU: The “North Slope Sundry Matrix” was developed with AOGCC approval to guide 10-403/10- 404 submission in Hilcorp’s Milne Point, Endicott and Northstar fields following the 2014 acquisition. This Sundry matrix was later utilized to guide 10-403/10-404 submission at the Point Thompson field following that acquisition in 2022. Oooguruk/Nikiatchuq Sundry Matrix: The Oooguruk/Nikiatchuq sundry matrices are identical and match the matrices listed in the fields’ corresponding Conservation Orders CO 814 and CO 815. These COs were formally changed to apply “Hilcorp Alaska, LLC” by CO 25-008 and CO 25-009 respectively. North Slope Sundry Matrix COs Within Hilcorp operated North Slope fields there are five conservation orders with sundry matrices. Milne Point CO 347A * Endicott: CO 297A * Prudhoe Bay: CO 556A Oooguruk: CO 814 Nikiatchuq: CO 815 *The sundry matrix conservation orders for Endicott and Milne Point have not been formally changed to apply to Hilcorp Alaska, LLC. There is no formal conservation order for an official sundry matrix at Northstar or Point Thompson. Potential Updates to PBU Sundry Matrix and Non PBU Sundry Matrix COs If there is an opportunity to update the PBU Matrix while the orders are already being opened/revised, the following updates (in bold) would be desirable from Hilcorp’s perspective. . Update to “Injection Wells – No Forms Required - Other Operations” WI/WAG or Polymer swaps. -This is included in the current “North Slope” sundry matrix and is frequent practice at MPU Update to “Production Wells – 10-404 Required – Thru Tubing Operations” Install/remove tubing patch. – Clarifies that tubing patches can also be removed, this is included in “North Slope” and CO 814/815 matrices. Add to “General Well Work – No Forms Required” Set/Retrieve SCSSSV or Injection Valve – Provides clarity around routine SSSV pull/run and this is currently in the “North Slope” matrix Add to “Production & Injection Wells – 10-403 & 10-404/407 Required– Rig-Coil Operations” Extended Perforating with Coil – This is to clearly define the requirement for a 10- 403 for extended add perfs even when target perfs are within an existing pool. Add/Update “Production & Injection Wells – 10-404 Required – Other Operations” Sealant Material and Conductor Fill – Currently this is only listed on Injection wells in CO 556A. This refers to corrosion inhibitor treatment in conductor annulus. Would be good to clarify that these have historically been submitted by batch letter and spreadsheet rather than 10-404 due to the large number of treatments/wells. Submitted by letter and spreadsheet in lieu of 10-404 Update “General Well Work – No Forms Required” Retrievable Downhole Choke - To differentiate from a permanent choke such as frequently set cast “Polar Chokes” requiring a 10-404. Update “Injection Wells – 10-403 Required” Water Wash Gas Injector to require a 10-404 only or no form required - Hilcorp sees this as a standard maintenance activity to clean near wellbore buildup similar to Schmoo-B-Gone treatments and not a reservoir stimulation. If the record of the frequency and volumes of washes is desirable for the well file/well history standpoint this could be achieved with 10-404. Adopting the Green (No Forms Required), Yellow (10-404/407 Required) and Red (10- 403 and 10-404/407 required) background coloring convention utilized on NS and KEN/CIO matrices. This color convention has helped Hilcorp engineers with clearly and correctly referencing the 10-403/404 requirements from the matri. Remove Rule 6 weekly reporting requirement of CO 347A and CO 297A to be consistent with other Sundry Matrix COs. This weekly reporting of workover operations requiring a 10-404 only was found to have little value for the AOGCC in Prudhoe and was removed from CO 556A . It was not included in CO 814/815. Formal Conservation Orders for Northstar and Point Thompson Fields – Even though the sundry matrices exempt some requirements of CO 20 AAC 25.280, they also help to clarify formal requirements of form submission for other activities not intuitively covered by 20 AAC 25.280. The North Slope Sundry Matrix has provided a great deal of guidance for 10-403/404 submission at NorthStar and Point Thompson Fields it would be beneficial to maintain this guidance in these fields. Please let me know if you have any questions/comments or would like to see any of this in a different format. Wyatt Rivard | Well Integrity ManagerO: (907) 777-8547 | C: (509)670-8001 | RM:10616Hilcorp Alaska, LLC | Anchorage, AK 99503 From: Boman, Wade C (OGC) <wade.boman@alaska.gov> Sent: Monday, May 19, 2025 10:20 AM CAUTION: External sender. DO NOT open links or attachments from UNKNOWN senders. To: Wyatt Rivard <wrivard@hilcorp.com> Subject: [EXTERNAL] sundry matrices email not sent to Wade Boman Wyatt, could you please send me the sundry matrices email that you sent out on May 14? You sent it to Wade Hudgens, not Wade Boman. It did make it to Mel and Jack on this end. Thanks. -Wade Boman Wade Boman Petroleum Engineer Alaska Oil & Gas Conservation Commission 333 W 7th Ave, Anchorage, AK 99501 wade.boman@alaska.gov office: 907-793-1238 cell: 907-687-4468 The information contained in this email message is confidential and may be legally privileged and is intended only for the use of theindividual or entity named above. If you are not an intended recipient or if you have received this message in error, you are herebynotified that any dissemination, distribution, or copy of this email is strictly prohibited. If you have received this email in error, pleaseimmediately notify us by return email or telephone if the sender's phone number is listed above, then promptly and permanently deletethis message. While all reasonable care has been taken to avoid the transmission of viruses, it is the responsibility of the recipient to ensure that the onward transmission, opening, or use of this message and any attachments will not adversely affect its systems or data. No responsibilityis accepted by the company in this regard and the recipient should carry out such virus and other checks as it considers appropriate. 1 From:Boman, Wade C (OGC) To:Rixse, Melvin G (OGC); Lau, Jack J (OGC); McLellan, Bryan J (OGC); Roby, David S (OGC); Chmielowski, Jessie L C (OGC); Regg, James B (OGC); Dewhurst, Andrew D (OGC); Davies, Stephen F (OGC) Subject:FW: sundry matrices for NS units Date:Wednesday, May 7, 2025 9:31:00 AM Wade Boman Petroleum Engineer Alaska Oil & Gas Conservation Commission 333 W 7th Ave, Anchorage, AK 99501 wade.boman@alaska.gov office: 907-793-1238 cell: 907-687-4468 _____________________________________________ From: Boman, Wade C (OGC) Sent: Friday, May 2, 2025 2:45 PM To: Taylor Wellman <twellman@hilcorp.com>; Aras Worthington <Aras.Worthington@hilcorp.com>; Torin Roschinger <torin.roschinger@hilcorp.com> Subject: sundry matrices for NS units Guys, we’re wanting to shift soon to consolidating and defining sundry matrices for the Hilcorp North Slope operated fields – Taylor and I chatted about this the other day. To start the process it will be cleaner, so to speak, if Hilcorp officially makes a formal request from its end. Then the Commission can start the process of altering and creating conservation orders. I think everyone (both Hilcorp engineers and managers) and the Commission (engineers) ideally wants a single sundry matrix to reference for all the Hilcorp operated NS fields. However, there could be exceptions. For arguments’ sake, the same matrix could be applied to all fields. However, the way it would work is each Unit would have its own Conservation Order, containing that unit’s specific sundry matrix. For example, the Nikaitchuq Unit would have its own CO defining its sundry matrix, and the MPU would have its own CO defining its sundry matrix, even if both matrices were the same word for word. The reason for this on the State’s end is having the Units separated is helpful in the event of an alteration of a CO for an area or in the event of a Unit’s sale to another operator. It just keeps things separate. For example, Prudhoe’s matrix could change later and not affect the NU one at all. If this all sounds good, please make a formal request for Conservation Orders for the defining of sundry matrices for each individual unit (that would cover all pools within that unit). For example, make a request for the NU that would include the soon-to-be- expanded SBOP, a separate request for the MPU that would include the SBOP, KROP, and SROP, et al. Some would be administrative approvals to existing COs (like Nikaitchuq, that already has a sundry matrix, written for Eni), and some would be brand new (such as for the MPU, which has no sundry matrix). I haven’t had the time to compare the different sundry matrices line for line. So please include the exact sundry matrix that you envision for each Unit. This should get the ball rolling and give us a good place to start on this end. Taylor, please cc the appropriate people at Hilcorp whom I left off this email. Thanks. - Wade Wade Boman Petroleum Engineer Alaska Oil & Gas Conservation Commission 333 W 7th Ave, Anchorage, AK 99501 wade.boman@alaska.gov office: 907-793-1238 cell: 907-687-4468