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Inspection Report Mechanical Integrity Test Osage DNR / Environmental Protection Agency 1201 Elm Street, Suite 500 Dallas TX 75270 Inspector Matthew Allen MIT Date 04/02/2025 Operator Representative NB Operating, LLC Report Sent Operator Time 11:45 Inject Interval 2550 - 2558 USDW 120 Well Type Dual Completion Annulus Fluid Type Casing 5.5 Concentric Pkr Tubing 2.375 Packer Depth Operator Info NB Operating, LLC Post Office Box 14411 Tulsa, OK 74159 Phone: 918-857-0434 Inventory ID API Well No Lease Name Well ID OS5175000 Oliphant 3 Location SE 25 24N 07E Type of MIT Ada Pressure Test Test Reason Routine Injecting N Injection Rate (bpd) Tubular Lining Ann Filled (hrs) MIT Due 02/24/2024 MIT Freq EVERY FIVE YEARS Ann Press Mont Time Pre-Test Tubing Pressure 65 Annulus Pressure Flowback Pressure High Volume Initial 11:45 1120 Mid Mid 12:00 1100 Low Final 12:15 1100 End Total Volume ADA Pressure Test - Required Test Pressure (Fluid Column Ht * Specific Gravity * .433 / N2 Wt Fac = Required Test Pressure) Tubing Annulus Depth to Top Perf/Open Hole Depth to Fluid Level Fluid Column Level 2550 0 2550 Specific Gravity of Fluid 1.06 Nitrogen Weight Factor 1.0914 Required Pressure Test 1137.38 Remedial Action Type Fluid Migration Test Type Inspection Comments Inspector Signature Remedial Action Type Well OS5175000 was observed with 65psig on tubing prior to the MIT. This 65psi was added to the calculated test pressure of 1072.38psi for a final required test pressure of 1137.38psi. The well achieved 1120psig, and fell off to 1100psig during the 30 minute observation period. At the time of the inspection, well OS5175000 was dual completed for gas production from the annulus and saltwater injection down the tubing. MATTHEW ALLEN Date: 2025.04.22 16:04:26 -05'00' Digitally signed by MATTHEW ALLEN Supervisor Signature JEANNE ECKHART Date: 2025.04.24 06:59:04 -05'00' Digitally signed by JEANNE ECKHART NB Operating, LLC/Oliphant Lease (OS5175000) (UIC) Inspection Date: 04/02/2025 Appendix 1 Photograph Log 1 Photo UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Photograph Log Location: 36.523948, -96.497737 City: Hominy Photo No. 1 County/Parish: Osage State: Oklahoma Photo File Name: R0010634 Orientation: NNW Date of Photo: 4/02/2025 Time of Photo: 12:24PM Latitude: 36.523948 Longitude: -96.497737 Photographer: Matthew Allen Description: This was well OS5175000 at the time of the inspection.