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Home My WebLink About2022 Greater Mooses Tooth April 1, 2023 Alaska Oil and Gas Conservation Commission 333 West 7th Avenue, Suite 100 Anchorage, AK 99501 Attention: Commissioner Brett Huber RE: • 2022 Annual Reservoir Surveillance 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 Moose’s Tooth Unit, submits the 2022 annual surveillance 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 2022 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 April 1, 2023 2022 GMTU Reservoir Surveillance Report Table of Contents Lookout Oil Pool Annual Reservoir Review …………………….……………………………… 1 Rendezvous Oil Pool Annual Reservoir Review …………………….……………………….... 3 Attachment 1: Reservoir Pressure Map at Datum - Lookout............………………….….… 5 Attachment 2: Reservoir Pressure Map at Datum - Rendezvous …………...........….….… 6 Attachment 3: 10-412 Pressure Survey Results - Lookout ………..…....……………..…… 7 Attachment 4: 10-412 Pressure Survey Results - Rendezvous …………….....……...…… 8 Attachment 5: 10-413 Report of Injection Project – Lookout ……………………………...…9 Attachment 6: 10-413 Report of Injection Project – Rendezvous …………...……..…...… 10 Attachment 7: 10-428 Annual Reservoir Properties Report …………………………..…… 11 2022 GMTU Reservoir Surveillance 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 Lookout Oil Pool 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 producer fracture stimulated in March 2019. 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 2022. 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, 2023. The cumulative I/W ratio at the end of 2022 was 0.98. The following is a summary of the Lookout Oil Pool status as of January 1, 2023. Lookout Oil Pool 2022 Daily Average Rate Cumulative Volume Oil Production 1.7 MBOPD 7.6 MMSTB Gas Production 5.3 MMSCFD 15.0 BSCF Water Production 4.7 MBWPD 6.0 MMSTB Gas Injection 11.0 MMSCFD 9.1 BSCF Water Injection 2.9 MBWPD 15.8 MMSTB 2022 GMTU Reservoir Surveillance Report 2 Lookout Oil Pool 2022 Voidage Balance Month Monthly Injection/Withdrawal Ratio, RVB/RVB Cumulative Injection/Withdrawal Ratio, RVB/RVB January 0.67 0.97 February 0.77 0.96 March 0.93 0.96 April 1.18 0.97 May 1.08 0.97 June 0.67 0.96 July 0.92 0.96 August 0.94 0.96 September 0.97 0.96 October 0.74 0.96 November 0.83 0.95 December 1.17 0.96 Summary and Analysis of Reservoir Pressure Surveys Two pressure surveys were performed in Lookout Oil Pool wells during 2022. See Attachment 3 for the 10-412 Report of Reservoir Pressures. Results and Analysis of Production and Injection Log Surveys, Temperature, Tracer Surveys, Observation Well Surveys and Special Monitoring There were no injection or production profile logs run in 2022. 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 2022 is 1.06. 2022 GMTU Reservoir Surveillance 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). Rendezvous Oil Pool 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). The ongoing development scheme premises water injection with alternating gas injection (WAG) for pressure maintenance and improved recovery. Gas injection is expected to commence by Q4 2023. The start of gas injection has been delayed due to rapid connections between injector and producer well pairs due to natural fractures in the reservoir. Cumulative water injection in 2022 was 5.2 MMBW. There was no gas injection in 2022. 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, 2023. The cumulative I/W ratio at the end of 2022 was 0.18. Water injection and voidage replacement are low in 2022 due to pre-producing the injectors for reservoir performance data collection, delaying first injection startup, and reduced injection rates due to early water breakthrough connections in several injector/producer patterns. The following is a summary of the Rendezvous Oil Pool status as of January 1, 2023. Rendezvous Oil Pool 2022 Daily Average Rate Cumulative Volume Oil Production 14.6 MBOPD 5.5 MMSTB Gas Production 71.5 MMSCFD 26.4 BSCF Water Production 3.5 MBWPD 1.3 MMSTB Gas Injection 0.0 MMSCFD 0.0 BSCF Water Injection 14.2 MBWPD 5.2 MMSTB 2022 GMTU Reservoir Surveillance Report 4 Rendezvous Oil Pool 2022 Voidage Balance Month Monthly Injection/Withdrawal Ratio, RVB/RVB Cumulative Injection/Withdrawal Ratio, RVB/RVB January 0.20 0.14 February 0.33 0.25 March 0.25 0.25 April 0.19 0.23 May 0.16 0.21 June 0.11 0.18 July 0.15 0.18 August 0.14 0.17 September 0.16 0.17 October 0.23 0.18 November 0.28 0.19 December 0.35 0.20 Summary and Analysis of Reservoir Pressure Surveys Nine static pressure surveys were performed in Rendezvous Oil Pool wells during 2022. See Attachment 4 for the 10-412 Report of Reservoir Pressures. Results and Analysis of Production and Injection Log Surveys, Temperature, Tracer Surveys, Observation Well Surveys and Special Monitoring There were eight production and one injection profile logs run in 2022 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 and also identify possible remediation options. To date, composite bridge plugs 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 injector and MT7-01 producer to understand water injection transient time. The test found the initial water interaction between the two wells was less than one day 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). 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 2022 is 0.95. 2022 GMTU Reservoir Surveillance Report 5 Attachment 1: Reservoir Pressures at Datum – Lookout Oil Pool 2022 GMTU Reservoir Surveillance Report 6 Attachment 2: Reservoir Pressures at Datum – Rendezvous Oil Pool 2022 GMTU Reservoir Surveillance Report 7 Attachment 3: 10-412 Pressure Survey Results by Pool - Lookout 2022 GMTU Reservoir Surveillance Report 8 Attachment 4: 10-412 Pressure Survey Results by Pool – Rendezvous 2022 GMTU Reservoir Surveillance Report 9 Attachment 5: 10-413 Report of Injection Project - Lookout 2022 GMTU Reservoir Surveillance Report 10 Attachment 6: 10-413 Report of Injection Project - Rendezvous 2022 GMTU Reservoir Surveillance Report 11 Attachment 7: 10-428 Annual Reservoir Properties Report