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Home My WebLink About2023 Greater Mooses Tooth March 27, 2024 Alaska Oil and Gas Conservation Commission 333 West 7th Avenue, Suite 100 Anchorage, AK 99501 Attention: Commissioner Brett Huber RE: • 2023 Annual Reservoir Review Report, Greater Mooses Tooth Unit, Lookout and Rendezvous Oil Pools • Form 10-412 for Lookout and Rendezvous Oil Pools • Form 10-413 for Lookout and Rendezvous Oil Pools • Form 10-428 for Lookout and Rendezvous Oil Pools Dear Commissioner Huber, ConocoPhillips Alaska, Inc., as operator and sole working interest owner of the Greater Mooses Tooth Unit, submits the 2023 annual reservoir review report and forms in accordance with Conservation Order 747, Rule 8 and Conservation Order 793, Rule 8. Sincerely, Ian Ramshaw Manager Western North Slope Asset Development Ian Ramshaw WNS Asset Development Manager ConocoPhillips Alaska, Inc. PO Box 100360 Anchorage, Alaska 99510-0360 Phone: (907) 263-4464 2023 Annual Reservoir Review Report, Greater Mooses Tooth Unit: Lookout and Rendezvous Oil Pools Form 10-412 for Lookout and Rendezvous Oil Pools Form 10-413 for Lookout and Rendezvous Oil Pools Form 10-428 for Lookout and Rendezvous Oil Pools March 27, 2024 2023 GMTU Reservoir Surveillance Report Table of Contents Lookout Oil Pool Annual Reservoir Review ........................................................................................................... 1 Rendezvous Oil Pool Annual Reservoir Review ................................................................................................... 3 Attachment 1: Reservoir Pressures at Datum – Lookout Oil Pool ................................................................ 6 Attachment 2: Reservoir Pressures at Datum – Rendezvous Oil Pool ......................................................... 7 Attachment 3: 10-412 Pressure Survey Results by Pool – Lookout ............................................................. 8 Attachment 4: 10-412 Pressure Survey Results by Pool – Rendezvous ...................................................... 9 Attachment 5: 10-413 Report of Injection Project – Lookout ..................................................................... 10 Attachment 6: 10-413 Report of Injection Project – Rendezvous ............................................................. 11 Attachment 7: 10-428 Annual Reservoir Properties Report ......................................................................... 12 2023 GMTU Annual Reservoir Review Report 1 Lookout Oil Pool Annual Reservoir Review ConocoPhillips Alaska, Inc., (CPAI) as Operator and sole working interest owner of the Greater Mooses Tooth Unit (GMTU), submits this Lookout Oil Pool (LOP) Annual Reservoir Review as required by Conservation Order 747, Rule 8. Overview, Enhanced Recovery, and Reservoir Management Summary LOP production and injection was initiated in October 2018. Lookout development drilling began in March 2018 with six wells completed by year-end 2018. One additional well was drilled in 2019 for a total of seven development wells (three producers and four injectors). Producer MT6-06 was the only well fracture stimulated. The ongoing development scheme premises water injection with alternating gas injection (WAG) for pressure maintenance and improved recovery. Gas injection commenced in June 2019 and WAG cycles continued through 2023. A Lookout geomodel was rebuilt in 2019 based on the data collected while drilling the development wells. Subsequent updates to the geomodel and resulting simulation model continued through 2020 based on observations and learning from dynamic production data as well as data collected from well logging campaigns. These models are used for optimization and to aid in the identification of future development opportunities and will continue to be updated as new data is collected. Reservoir Voidage Balance and Cumulative Status The tables below summarize average daily injection and production rates, cumulative fluid volumes, and voidage balance as of January 1, 2024. The cumulative I/W ratio at the end of 2023 was 0.96. The following is a summary of the LOP status as of January 1, 2024. Lookout Oil Pool 2023 Daily Average Rate Cumulative Volume Oil Production 1.6 MBOPD 8.2 MMSTB Gas Production 12.9 MMSCFD 19.8 BSCF Water Production 2.1 MBWPD 6.8 MMSTB Gas Injection 7.5 MMSCFD 11.8 BSCF Water Injection 6.5 MBWPD 18.2 MMSTB 2023 GMTU Annual Reservoir Review Report 2 Lookout Oil Pool 2023 Voidage Balance Month Monthly Injection/Withdrawal Ratio, RVB/RVB Cumulative Injection/Withdrawal Ratio, RVB/RVB January 1.17 0.98 February 1.24 0.98 March 1.18 0.98 April 0.71 0.98 May 0.97 0.98 June 0.88 0.98 July 0.44 0.97 August 1.50 0.98 September 1.75 0.98 October 1.30 0.98 November 0.46 0.97 December 0.61 0.96 Reservoir Pressures at Datum Map and Summary and Analysis of Reservoir Pressure Surveys See Attachment 1 for the reservoir pressures at datum map. Two pressure surveys were performed in LOP wells during 2023. See Attachment 3 for the 10-412 Report of Reservoir Pressures. Results and Analysis of Production and Injection Log Surveys, Tracer Surveys, Observation Well Surveys, and Special Monitoring There were no injection or production profile logs run in 2023. The Lookout 1 exploration well was plugged and abandoned (P&A) in March 2021. Prior to P&A a reservoir saturation tool (RST) log was run in the Lookout 1 to assess the waterflood sweep. Review of Production Allocation Factors and Issues In accordance with AOGCC Other Order 112 dated October 12, 2016, Other Order 112A dated December 22, 2016, and BLM Sundry Approval for Measurement by Other Methods dated October 14, 2016, LOP production will receive an allocation factor of one (1.0). Production allocation to individual production wells in the LOP is performed in the same manner as other CPAI North Slope fields. An allocation factor comparing actual total daily LOP production sales to the sum of individual well theoretical rates will be used to adjust theoretical well production to allocated well production. The average individual well allocation factor in 2023 is 1.00. 2023 GMTU Annual Reservoir Review Report 3 Rendezvous Oil Pool Annual Reservoir Review ConocoPhillips Alaska, Inc., (CPAI) as Operator and sole working interest owner of the Greater Mooses Tooth Unit (GMTU), submits this Rendezvous Oil Pool (ROP) Annual Reservoir Review as required by Conservation Order 793, Rule 8. Overview, Enhanced Recovery, and Reservoir Management Summary Rendezvous development drilling began in April 2021 with four wells completed by year-end (two producers and two injectors). ROP production was initiated in November 2021 and injection was initiated in December 2021. There were 8 wells drilled in 2022 and a total of 11 active wells as of year-end 2022 (six producers and five injectors). In 2023, 7 wells were drilled, with a total of 17 active wells as of year-end 2023 (eight producers and nine injectors). The ongoing development scheme premises water injection with alternating gas injection (WAG) (where appropriate) for pressure maintenance and improved recovery. Gas injection began in Q2 2023 with the MT7-11 injector. Cumulative water injection at year-end 2023 was 15.0 MMBW. Cumulative gas injection at year-end 2023 was 10.8 BSCF. A Rendezvous geomodel is continuously being updated as new data is acquired while drilling the development wells. Updates to the geomodel and resulting simulation model will continue based on newly acquired data from drilling, observations, and learnings from dynamic production data, as well as any surveillance data collected. These models are used for forecasting and identifying optimization opportunities. Reservoir Voidage Balance and Cumulative Status The tables below summarize average daily injection and production rates, cumulative fluid volumes, and voidage balance as of January 1, 2024. The cumulative I/W ratio at the end of 2023 was 0.41. Water injection and voidage replacement are impacted by pre-producing new injectors for reservoir performance data collection, reduced injection rates due to early water breakthrough connections in several injector/producer patterns, and excess gas production from the gas-cap. The following is a summary of the ROP status as of January 1, 2024. Rendezvous Oil Pool 2023 Daily Average Rate Cumulative Volume Oil Production 14.7 MBOPD 10.9 MMSTB Gas Production 64.8 MMSCFD 50.1 BSCF Water Production 7.1 MBWPD 3.9 MMSTB Gas Injection 29.5 MMSCFD 10.8 BSCF Water Injection 26.7 MBWPD 15.0 MMSTB 2023 GMTU Annual Reservoir Review Report 4 Rendezvous Oil Pool 2023 Voidage Balance Month Monthly Injection/Withdrawal Ratio, RVB/RVB Cumulative Injection/Withdrawal Ratio, RVB/RVB January 0.22 0.20 February 0.36 0.21 March 0.77 0.24 April 0.87 0.27 May 0.49 0.28 June 0.89 0.31 July 0.64 0.33 August 0.64 0.35 September 0.52 0.36 October 0.67 0.38 November 1.12 0.40 December 1.52 0.45 Reservoir Pressures at Datum Map and Summary and Analysis of Reservoir Pressure Surveys See Attachment 2 for the reservoir pressures at datum map. Fourteen static pressure surveys were performed in ROP wells during 2023. See Attachment 4 for the 10-412 Report of Reservoir Pressures. Results and Analysis of Production and Injection Log Surveys, Tracer Surveys, Observation Well Surveys, and Special Monitoring There were five production and four injection profile logs run in 2023 to further understand both water and gas entry points along the reservoir laterals. The data continues to be used to understand conformance across the field. To date, composite bridge plugs and retrievable patches have been used to temporarily isolate sections of the laterals based on profile log results. Additional remediation techniques may be applied in the future. A tracer test was also performed between the MT7-03 and MT7-07 injectors and MT7-01 and MT7-05 producers to understand water injection transient time. The test found the initial water interaction between the two wells was approximately two days and the data will be utilized to design any future conformance mitigation. Review of Production Allocation Factors and Issues In accordance with AOGCC Other Order 148 dated December 19, 2018 and BLM Sundry Approval for Oil Measurement by Other Methods and Redundancy Verification of Oil Measurement Secondary Pressure and Temperature Instruments Greater Moose’s Tooth Unit (Rendezvous) dated July 1, 2019, ROP production will receive an allocation factor of one (1.0). 2023 GMTU Annual Reservoir Review Report 5 Production allocation to individual production wells in the ROP is performed in the same manner as other CPAI North Slope fields. An allocation factor comparing actual total daily ROP production sales to the sum of individual well theoretical rates will be used to adjust theoretical well production to allocated well production. The average individual well allocation factor in 2023 is 0.99. 2023 GMTU Annual Reservoir Review Report 6 Attachment 1: Reservoir Pressures at Datum – Lookout Oil Pool 2023 GMTU Annual Reservoir Review Report 7 Attachment 2: Reservoir Pressures at Datum – Rendezvous Oil Pool 2023 GMTU Annual Reservoir Review Report 8 Attachment 3: 10-412 Pressure Survey Results by Pool – Lookout Mar-26-2024 2023 GMTU Annual Reservoir Review Report 9 Attachment 4: 10-412 Pressure Survey Results by Pool – Rendezvous Mar-26-2024 2023 GMTU Annual Reservoir Review Report 10 Attachment 5: 10-413 Report of Injection Project – Lookout Mar-26-2024 2023 GMTU Annual Reservoir Review Report 11 Attachment 6: 10-413 Report of Injection Project – Rendezvous Mar-26-2024 2023 GMTU Annual Reservoir Review Report 12 Attachment 7: 10-428 Annual Reservoir Properties Report 3. Field and Pool Code: 4. Pool Name 5. Reference Datum (ft TVDSS) 6. Temperature (°F) 7. Porosity (%) 8. Permeability (md) 9. Swi (%)10. Oil Viscosity @ Original Pressure (cp) 11. Oil Viscosity @ Saturation Pressure (cp) 12. Original Pressure (psi) 13. Bubble Point or Dew Point Pressure (psi) 14. Current Reservoir Pressure (psi) 15. Oil Gravity (°API) 16. Gas Specific Gravity (Air = 1.0) 17. Gross Pay (ft) 18. Net Pay (ft) 19. Original Formation Volume Factor (RB/STB) 20. Bubble Point Formation Volume Factor (RB/STB) 21. Gas Compressibility Factor (Z) 22. Original GOR (SCF/STB) 23. Current GOR (SCF/STB) 282100 Lookout Oil 7850 185 15 13 30 .237 .222 3775 3240 3596 42 .843 50 24 1.751 1.771 .788 1385 8428 282200 Rendezvous Oil 8108 207 16 1.7 45 .232 .232 3802 3815 3802 37 .896 150 100 1.71 1.71 .878 1279 5000 WNS Base Performance Supervisor STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION ANNUAL RESERVOIR PROPERTIES REPORT 1. Operator:2. Address: Alexandra Caldelas I hereby certify that the foregoing is true and correct to the best of my knowledge. Signature ConocoPhillips Alaska, Inc.P.O. Box 100360, Anchorage, AK 99501-0360 Printed Name Title Date Mar-26-2024