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Home My WebLink About2020 Lookout Oil Pool 2020 Annual Reservoir Review Report, Greater Moose’s Tooth Unit: Lookout Oil Pool Form 10-412 for Lookout Oil Pool Form 10-413 for Lookout Oil Pool Form 10-428 for Lookout Oil Pool Safety Valve System Testing Results for 2020 April 1, 2021 2019 GMTU Reservoir Surveillance Report Table of Contents Lookout Oil Pool Annual Reservoir Review …………………….……………….......... 1 Attachment 1: Reservoir Pressure Map at Datum ………................................….… 3 Attachment 2: 10-412 Pressure Survey Results …………….………….…...…..…… 4 Attachment 3: 10-413 Report of Injection Project ………….…………….…...…...… 5 Attachment 4: 10-428 Annual Reservoir Properties Report ………….…………….. 6 Attachment 5: Safety Valve System Test Results ……….………….....……….….… 7 2020 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 Moose’s 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 2020. 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 flood management and will continue to be updated as new data is collected. Cumulative water injection in 2020 was 3.1 MMBW. Cumulative gas injection in 2020 was 2.6 BSCF. Cumulative water production in 2020 was 2.1 MMBW which equates to an annual average water cut of 60.5%. 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, 2021. The cumulative I/W ratio at the end of 2020 was 0.99. The following is a summary of the Lookout Oil Pool status as of January 1, 2021. Lookout Oil Pool 2020 Daily Average Rate Cumulative Volume Oil Production 3.7 MBOPD 6.1 MMSTB Gas Production 6.5 MMSCFD 10.0 BSCF Water Production 5.7 MBWPD 2.6 MMSTB Gas Injection 7.1 MMSCFD 3.1 BSCF Water Injection 8.6 MBWPD 12.0 MMSTB 2020 GMTU Reservoir Surveillance Report 2 Lookout Oil Pool 2020 Voidage Balance Month Monthly Injection/Withdrawal Ratio, RVB/RVB Cumulative Injection/Withdrawal Ratio, RVB/RVB January 1.22 0.97 February 1.15 0.98 March 1.18 0.98 April 1.09 0.99 May 0.95 0.99 June 1.12 0.99 July 1.94 1.01 August 0.95 1.01 September 1.20 1.01 October 0.83 1.01 November 0.66 1.00 December 0.72 0.99 Summary and Analysis of Reservoir Pressure Surveys Five static pressure surveys were performed in Lookout Oil Pool wells during 2020. See Attachment 2 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 For flood management surveillance two injection profile logs and two production profile logs were run in 2020. Well Log Date Results MT6-02 Injection profile 2/10/2020 Logged to 17450' in L1 MT6-05 Production profile 1/10/2020 Mainbore profile to 11000', determine splits between laterals MT6-05 Production profile 3/17/2020 Profile of lower lateral to 14760' MT6-09 Injection profile 2/21/2020 Logged to 17450' 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 2020 is 0.98. 2020 GMTU Reservoir Surveillance Report 3 Attachment 1: Reservoir Pressures at Datum Lookout Oil Pool 2020 GMTU Reservoir Surveillance Report 4 Attachment 2: 10-412 Pressure Survey Results by Pool - LOOKOUT 2020 GMTU Reservoir Surveillance Report 5 Attachment 3: 10-413 Report of Injection Project by Pool - LOOKOUT 2020 GMTU Reservoir Surveillance Report 6 Attachment 4: 10-428 Annual Reservoir Properties 2020 GMTU Reservoir Surveillance Report 7 Attachment 5: Safety Valve System Test Results - 2020