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Home My WebLink About2024 Kuparuk Undefined Pool Greater Kuparuk Area 2024 Undefined Pool Report Ugnu Formation Reporting Period January 1 to December 31, 2024 Page left blank intentionally. Undefined Oil Pool Report 2 Donald Allan Manager, GKA Asset Development Greater Kuparuk Area ConocoPhillips Alaska, Inc. ATO-1076 PO Box 100360 Anchorage AK 99510-0360 Phone (907) 263-4650 March 25, 2025 Ms. Jessie Chmielowski, Commissioner Alaska Oil and Gas Conservation Commission 333 West 7th Ave. Suite 100 Anchorage, Alaska 99501 Re: 2024 Undefined Oil Pool Reservoir Report Dear Commissioner Chmielowski, In compliance with Title 20 AAC 25.517, ConocoPhillips Alaska, Inc., operator of the Kuparuk River Unit, is hereby submitting the Plans of reservoir development and operation for Undefined Oil Pools. This report documents the required information pertinent to the field development and enhanced recovery operations from January through December 2023. The following is an outline of the information provided: • Ugnu Formation – 2024 Report Operations Review (Attachment 1) If you have any questions concerning this data, please contact Adam Schnellbaecher at (907) 263-4188. Sincerely, Donald Allan Manager, GKA Asset Development Greater Kuparuk Area Undefined Oil Pool Report 3 Attachment 1 Ugnu Formation 2024 Report Operations Review UGNU PILOTS/ STUDIES The Kuparuk River Unit working interest owners re-started the Ugnu Heavy Oil pilot and established stabilized oil flow from well 1H-401 during December 2013. A down hole heater was used to lower the oil viscosity sufficiently to allow viscous oil to flow via a progressive cavity pump installed in the well. The well was online for approximately 10 cumulative months until it was shut in March 2016 due to a failed pump. In 2017 and 2018, elastomer studies were completed to redesign a downhole pump more appropriate for the fluid chemistry and downhole conditions. A new pump design was installed in April 2019. The well was online for two weeks before the motor failed. Evaluating rig workover alternatives to bring the well back on production. One well, 1C-501, was drilled in 2023 to serve as a clean-water source well for planned West Sak injectors on drillsite 1C. Undefined Oil Pool Report 4 Page left blank intentionally. Undefined Oil Pool Report 5