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2023 Oooguruk-Torok Oil Pool
2023 Annual Reservoir Surveillance Report Oooguruk-Torok Oil Pool (OTOP) Oooguruk Field April 1st, 2024 Eni Petroleum, Alaska Table of Contents SUBJECT PAGE 1.0 Progress of the Enhanced Recovery Project ............................................................................. 1 2.0 Results and Analysis of Reservoir Pressure Surveys within the Pool .......................................... 3 3.0 Results and Analysis of Production and Injection Log Surveys, Tracer Surveys, Observation Well Surveys and Any Other Special Monitoring ....................................................................................... 4 4.0 Review of Pool Production Allocation Factors and Issues Over the Year .................................... 4 5.0 Reservoir Management Summary........................................................................................... 5 ATTACHMENT A: OTOP Well Location Map .................................................................................... 6 ATTACHMENT B: 2023 OTOP Voidage Balance by Month ................................................................ 7 ATTACHMENT C: December 2023 OTOP Reservoir Pressure Map ..................................................... 8 ATTACHMENT D: 2023 OTOP Form 10-412 Pressure Report ............................................................ 9 ATTACHMENT E: OTOP Form 10-428 Annual Reservoir Properties Report ....................................... 10 ATTACHMENT F: ODST-46 Pressure Monitoring and Daily Injection Volumes (AIO 37A, Rule 9) ........ 11 Eni Petroleum, Alaska Page | 1 1.0 Progress of the Enhanced Recovery Project The Oooguruk Field (OF) is one of two Eni US Operating Co. Inc. (Eni) offshore-operated fields in Alaska. Three oil pools, the Torok, Kuparuk and Nuiqsut, are currently under development within the OF. The development consists of an offshore man-made gravel island, the Oooguruk Drill Site (ODS), located just east of the Colville River Delta in Harrison Bay. ODS production is delivered to the Oooguruk Tie-in Pad (OTP) via a buried subsea flowline bundle and onshore flowlines, metered, and then transferred to Kuparuk River Unit (KRU) facilities, operated by ConocoPhillips Alaska, Inc. (CPAI), for final processing and transportation to the sales line. The current OTOP development consists of two producing wells, ODST-39 and ODST-45A, and one injection well, ODST-46i. Attachment A shows the locations of the existing OTOP wells, the OTOP area, the current OU, and the Oooguruk Torok Participating Area (OTPA). During 2023, Operations and Facilities engineering performed internal operations and maintenance assessments to ensure compliance with corporate requirements. Eni’s corporate operations team also conducted an Oooguruk asset review to identify bottlenecks at the plant, efficiencies, and production improvement opportunities. The 2023 asset review recommended detailed actions and an engineering study to be conducted in cooperation with the specialists at HQ. An internal corporate assessment was also performed to ensure compliance with internal procedures on safety and environmental critical elements. An engineering study was conducted to revamp the 2-phase separator. Operations included general maintenance and replacing critical oil, water, and gas piping and valves. Field-wide maintenance was also performed, including mechanical integrity inspections of piping, tanks, pressure vessels and other safety systems. Per vendor recommendation, routine maintenance was performed on the three power generation turbines, including the generator cleaning. In addition, cathodic protection inspections were completed on the sub-sea production flowline from ODS to OTP to ensure the mechanical integrity of the pipelines. The river overflood inspections are completed annually to verify the depth of cover over the buried subsea pipelines, including modeling of water flows over the ice, strudel and scour identification and bathymetric surveys. A detailed monitoring plan for injection system microbes was established, with systematic biocide treatments conducted during 2023. Capital projects included eight (8) well workovers, 7 producers, and 1 injector. Four (4) ESPs were installed in production wells. The OTP control room design study was completed to relocate the OTP control room in 2025. Capital projects included upgrading the Fire and Gas software, mandatory tank and vessel inspections, lift/injection compressor PLC upgrade and module lifecycle upgrade. The ODS exterior camera system was completed and upgraded in 2023 to allow enhanced warning of nearby polar bears, seawater injection line pig trap upgrades, and the addition of a corrosion coupon to the ODS subsea diesel flowline was also completed. Eni Petroleum, Alaska Page | 2 A conversion from the existing Siemens PCS7 Distributed Control System (DCS) to Emerson DeltaV has been developed, with a detailed engineering study supporting implementation during the 2025 planned major maintenance turnaround. Finally, the Rig Support Complex (RSC) has been partially revamped to support the Well Work Over campaign that took place and future drilling campaigns. The revamping will continue in the following years. The Oooguruk development originally envisioned producing wells would ultimately utilize electrical submersible pumps (ESPs) to maximize drawdown and minimize gas lift and the associated KRU and hydraulic back-out effects. Currently, most OF producing wells require gas lift to produce; only two wells, ODSN-04 and ODSN-25, produce using ESPs. The gas lift gas coupled with the OF formation gas significantly impacts the flowline pressure, reducing overall flow rates and generating significant back-out costs at KRU, which is also primarily constrained by gas processing capacity. These constraints result in backing out KRU fluid production when a high total gas oil ratio (TGOR, includes formation and lift gas) OF fluids enter the system. Because of the hydraulic effects and KRU back-out all OF wells cannot be produced concurrently using gas lift. In 2023, on average, 14 of the 22 available producing OF wells were online, with TGOR ranking typically used to determine which wells to produce. In 2023 the activity on Torok wells on ODS was limited to five rigless interventions on three wells, as per Table 1 below. Table 1: 2023 OTOP Well Interventions Action #Well Name Well Type Location Reservoi r Action Type Objectives / Description Completion date 1 ODSDW1- 44 DSP ODS Torok Rigless Injection Valve replacement 10/31/2023 Eni Petroleum, Alaska Page | 3 As a result of the May 2022 through March 2023 rig program and sustained water injection, OF oil production peaked in April 2023 at 7,488 bpd from 5,000 bpd in April 2022, an increase of 2,488 bpd (+50%). December 2023 OF oil production averaged 6,217 bpd; the 1,271 bpd decline (-17%) from April was primarily a result of two early ESP failures (ODSN-02 in May and ODSK-41 in August), ODSN-06 Kuparuk oil rate decline, which was as expected, and overall OF decline. The 2023 annual average daily oil rate was 6,650 bpd, up 10% from 6,030 bpd in 2022. Produced water averaged 3,428 bpd, a 34% watercut, in 2023, up slightly from 3,280 bpd, a 35% watercut, in 2022. Total OF gas rates, formation plus lift gas, remained relatively stable, averaging 20.5 MMSCFPD in 2023 compared to 21.4 MMSCFPD in 2022. The OF production network remains hydraulically constrained, so only 13 of the 22 available wells were online on December 31, 2023. Consequently, due to the high total gas-oil ratio (TGOR) required to produce the OTOP wells utilizing gas lift, OTOP 2023 production was very limited. ODST-45A was not produced during 2023, and ODST-39 was limited to 21 days of production or 6% uptime. The average daily oil production rate was 226 bpd. Total oil production from the OTOP during 2023 was 4,752 barrels with the cumulative oil at 1,006,810 barrels total through 2023. The 2023 average producing gas oil ratio and watercut were 737 SCF/STBO and 72%, respectively. On July 25, 2020, ODST-46 developed tubing for inner annulus pressure communication, and it remains shut in and secured pending diagnostics and repairs. As a result, OTOP water injection was not conducted in 2023 for enhanced recovery. Attachment F, in compliance with AIO 37A, Rule 9, details the reporting period's daily well pressures and injection volumes. Cumulative water injection in the OTOP through 2023 is 840,369 barrels since the start of injection in 2012. Attachment B details the 2023 monthly and cumulative voidage for the OTOP. 2.0 Results and Analysis of Reservoir Pressure Surveys within the Pool Three pressure surveys were reported from two OTOP wells during 2023. The extended pressure build-ups in ODST-45A and ODST-39 coupled with the ODST-46i fall-off data, continue to suggest similar levels of depletion and continuity within the ODS OTOP development area. The average 2023 OTOP pressure at 5,000 ft TVDss is estimated at 2,100 psi. The OTOP Pressure Map, Attachment C, captures the average OTOP pressures for December 2023; all three wells have been shut-in for an extended period. Refer to Attachment D for the reported pressures surveys and relevant data. Eni Petroleum, Alaska Page | 4 3.0 Results and Analysis of Production and Injection Log Surveys, Tracer Surveys, Observation Well Surveys and Any Other Special Monitoring Extended shut-in bottom hole pressure data from ODST-39, ODST-45A and surface pressure fall- off data from ODST-46i indicate local communication in the reservoir as evidenced by the equalization of the pressures over time (refer to Attachments C and D). No additional surveillance logging or surveys were conducted in 2023. 4.0 Review of Pool Production Allocation Factors and Issues Over the Year Production from the Oooguruk-Torok Oil Pool (OTOP), Oooguruk-Kuparuk Oil Pool (OKOP) and Oooguruk-Nuiqsut Oil Pool (ONOP) is commingled at the surface into a common production line. Allocation between the pools is based on the ratio of total production for a pool to the total production for the Oooguruk Unit. The pool oil allocation factors for 2023 are: ONOP: 85.5% OKOP: 14.3% OTOP: 0.2% Theoretical production for individual wells for all pools is calculated daily. During 2023, wells were produced with chokes at 100% of the time due to the capacity of the production line. Daily theoretical production for a well was calculated using the data from the most current well test and the amount of time a well was on production for a given day: oductionlDailyTheoreticaBOPDxDailyRate dayMinutes Minutes Welltest produced Pr)( 1440 = The daily allocation factor for the unit is calculated by dividing the total production for the day by the sum of the theoretical daily production for each well. Daily allocated production is assigned to each well by multiplying its theoretical daily production by the daily allocation factor. The average daily oil allocation factor for 2023 was 0.9246. Eni Petroleum, Alaska Page | 5 5.0 Reservoir Management Summary The AOGCC issued pool rules under Conservation Orders No. 645A, 596 and 597 for the OTOP, OKOP and ONOP, respectively. At the same time, there is no subsurface commingling; unitized substances produced from the three oil pools are commingled on the surface. Area injection orders (AIOs) authorizing the injection of fluids for enhanced oil recovery in the OTOP, OKOP, and ONOP reservoirs were issued by the AOGCC as AIO No. 37A, 33 and 34, respectively. Injection commenced into the OTOP in 2012. The OTOP reservoir management targets maximizing oil production, managing producing gas oil ratios (GOR) and maximizing long-term reservoir performance and value through enhanced recovery while minimizing the project risks and maintaining the highest environmental and safety standards. Flood throughput and reliable water supply are critical to long-term OTOP recovery. Consequently, Eni implemented SWIS in 2020 and 2021 to avoid injecting KRU-produced water, improve water supply reliability, and increase available injection pressures. SWIS uptime has been very high, successfully meeting OF reservoir injection targets and increasing supply pressure. Additionally, once the ODS booster pump is placed in service, water injection supply pressures can be boosted from 3,400 psi to 3,700 psi, increasing injectivity and flood throughput in certain low injectivity wells. The AOGCC has approved increasing the pressure limit to 3,700 psi from 2,800 psi for both the ONOP and OKOP; however, the OTOP limit currently remains at 2,800 psi consistent with Rule 4 of AIO 37A; a request for the AOGCC to modify AIO 37A to increase the Torok limit to 3,700 psi is planned once ODST-46 is repaired and online. The well historically has very low injectivity and would benefit from this. As discussed previously, in 2023 there was no injection and limited production from the OTOP. Consequently, the current cumulative OTOP voidage replacement ratio remains at 32%. An Eni simulation model has been maintained and updated to assist in future development and flood management decisions in the OTOP. The Annual Reservoir Properties Report (Form 10-428) is included in Attachment E. Eni Petroleum, Alaska Page | 6 ATTACHMENT A: OTOP Well Location Map Eni Petroleum, Alaska Page | 7 ATTACHMENT B: 2023 OTOP Voidage Balance by Month Month Oil, MRB Free Gas, MRB Water, MRB Total Voidage, MRB Year Cum, MRB Cum since start-up, MRB Gas, MRB Water, MRB Total Injection, MRB Year Cum, MRB Cum. since start-up, MRB Net Injection, MRB Year Cum, MRB Cum since start-up, MRB Cum Since Start-Up thru 2022 >>3,161 Cum Since Start-Up thru 2022 >>1,005 -2,156 Jan-23 0.0 0.0 0.0 0.0 0.0 3,161 0 0.0 0.0 0.0 1,005 0.0 0.0 -2,156 Feb-23 0.0 0.0 0.0 0.0 0.0 3,161 0 0.0 0 0.0 1,005 0 0.0 -2,156 Mar-23 0.0 0.0 0.0 0.0 0.0 3,161 0 0.0 0 0.0 1,005 0 0.0 -2,156 Apr-23 0.0 0.0 0.0 0.0 0.0 3,161 0 0.0 0 0.0 1,005 0 0.0 -2,156 May-23 0.0 0.0 0.0 0.0 0.0 3,161 0 0.0 0 0.0 1,005 0 0.0 -2,156 Jun-23 2.59 1.61 6.43 10.62 10.62 3,171 0 0.0 0 0.0 1,005 -11 -10.6 -2,166 Jul-23 2.64 1.63 5.56 9.83 9.83 3,181 0 0.0 0 0.0 1,005 -10 -20.4 -2,176 Aug-23 0.00 0.00 0.00 0.00 0.00 3,181 0 0.0 0 0.0 1,005 0 -20.4 -2,176 Sep-23 0.00 0.00 0.00 0.00 0.00 3,181 0 0.0 0 0.0 1,005 0 -20.4 -2,176 Oct-23 0.00 0.00 0.00 0.00 0.00 3,181 0 0.0 0 0.0 1,005 0 -20.4 -2,176 Nov-23 0.00 0.00 0.00 0.00 0.00 3,181 0 0.0 0 0.0 1,005 0 -20.4 -2,176 Dec-23 0.00 0.00 0.00 0.00 0.00 3,181 0 0.0 0 0.0 1,005 0 -20.4 -2,176 2023 Totals 5.2 3.2 12.0 20.4 0 0 0 (20) Produced Fluids Injected Fluids Net Injection Eni Petroleum, Alaska Page | 8 ATTACHMENT C: December 2023 OTOP Reservoir Pressure Map Eni Petroleum, Alaska Page | 9 ATTACHMENT D: 2023 OTOP Form 10-412 Pressure Report 6. Oil Gravity: 24 8. Well Name and Number: 9. API Number 50XXXXXXXXXXXX NO DASHES 10. Type See Instructions 11. AOGCC Pool Code 12. Zone 13. Perforated Intervals Top - Bottom TVDSS 14. Final Test Date 15. Shut-In Time, Hours 16. Press. Surv. Type (see instructions for codes) 17. B.H. Temp. 18. Depth Tool TVDSS 19. Final Observed Pressure at Tool Depth 20. Datum TVDSS (input) 21. Pressure Gradient, psi/ft. 22. Pressure at Datum (cal) ODST-39 50703205720000 O 576175 Torok 4952 - 5009 5/21/2023 20,151 PBU 118 4,618 1,841 5,000 0.37 1,982 ODST-39 50703205720000 O 576175 Torok 4952 - 5009 12/15/2023 3,758 PBU 118 4,618 1,812 5,000 0.37 1,953 ODST-45A 50703206310000 O 576175 Torok 4944 - 5117 12/15/2023 33,537 PBU 125 4,820 2,029 5,000 0.44 2,108 STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION RESERVOIR PRESSURE REPORT 1. Operator:2. Address: Eni US Operating Company Inc. (Eni US)3700 Centerpoint Drive, Suite 500, Anchorage, AK 99503 3. Unit or Lease Name:4. Field and Pool:5. Datum Reference:7. Gas Gravity: Oooguruk Oooguruk-Torok Undefined 5000 0.7 Printed Name Keith Lopez Date April 1, 2024 23. All tests reported herein were made in accordance with the applicable rules, regulations and instructions of the Alaska Oil and Gas Conservation Commission. I hereby certify that the foregoing is true and correct to the best of my knowledge. Signature Title Production Engineer Eni Petroleum, Alaska Page | 10 ATTACHMENT E: OTOP Form 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) 576175 Torok 5000 135 19 4 52 3 - 5 3 - 5 2250 2250 2100 24 0.7 175 70 1.1 1.1 0.7 250 - 550 737 4/1/2024 I hereby certify that the foregoing is true and correct to the best of my knowledge. Signature Title Production Engineer Printed Name Keith Lopez Date STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION ANNUAL RESERVOIR PROPERTIES REPORT 1. Operator:2. Address: Eni US Operating Company Inc. (Eni US)3700 Centerpoint Drive, Suite 500, Anchorage AK 99503 Eni Petroleum, Alaska Page | 11 ATTACHMENT F: ODST-46 Pressure Monitoring and Daily Injection Volumes (AIO 37A, Rule 9) Inj Pressure IA Pressure OA Pressure GAS INJ (mscfd) WATER INJ (bbl/d) 2023 PI_27210C PI_27210G PI_27210H AVM AVM MONTH DAY MIN MAX AVG MIN MAX AVG MIN MAX AVG Daily Total Daily Total January 1 387 389 388 1,789 1,789 1,789 147 148 148 0 0 January 2 386 388 387 1,789 1,789 1,789 147 147 147 0 0 January 3 388 390 388 1,789 1,789 1,789 147 148 147 0 0 January 4 388 4,964 394 448 2,689 1,789 147 2,000 150 0 0 January 5 388 390 389 1,788 1,789 1,789 147 147 147 0 0 January 6 390 392 391 1,788 1,788 1,788 147 147 147 0 0 January 7 392 394 393 1,788 1,789 1,788 147 147 147 0 0 January 8 394 396 395 1,788 1,789 1,789 147 147 147 0 0 January 9 395 396 396 1,789 1,789 1,789 147 148 148 0 0 January 10 378 1,310 407 1,780 1,828 1,789 147 160 150 0 0 January 11 365 378 368 1,781 1,786 1,785 147 149 147 0 0 January 12 363 365 364 1,786 1,787 1,787 147 147 147 0 0 January 13 362 363 362 1,787 1,788 1,787 147 147 147 0 0 January 14 361 362 361 1,788 1,788 1,788 147 147 147 0 0 January 15 360 361 361 1,788 1,788 1,788 146 147 147 0 0 January 16 359 361 360 1,787 1,788 1,788 146 147 146 0 0 January 17 359 360 359 1,788 1,788 1,788 146 147 147 0 0 January 18 358 359 359 1,788 1,788 1,788 147 147 147 0 0 January 19 358 359 359 1,788 1,788 1,788 147 147 147 0 0 January 20 358 359 359 1,788 1,788 1,788 147 147 147 0 0 January 21 358 359 358 1,788 1,789 1,788 147 148 147 0 0 January 22 358 359 358 1,788 1,789 1,789 148 148 148 0 0 January 23 358 358 358 1,788 1,789 1,788 147 148 147 0 0 January 24 358 358 358 1,788 1,788 1,788 147 147 147 0 0 January 25 356 358 357 1,787 1,788 1,788 147 147 147 0 0 January 26 356 357 356 1,787 1,788 1,787 147 147 147 0 0 January 27 356 357 357 1,787 1,788 1,788 147 147 147 0 0 January 28 357 357 357 1,787 1,788 1,787 146 147 147 0 0 January 29 357 357 357 1,788 1,788 1,788 147 147 147 0 0 January 30 357 358 357 1,787 1,788 1,788 147 147 147 0 0 January 31 357 358 357 1,787 1,788 1,787 146 147 147 0 0 February 1 357 358 357 1,787 1,788 1,787 146 147 147 0 0 Eni Petroleum, Alaska Page | 12 February 2 357 358 357 1,787 1,788 1,787 147 147 147 0 0 February 3 358 358 358 1,787 1,788 1,787 147 147 147 0 0 February 4 358 359 359 1,787 1,788 1,788 147 147 147 0 0 February 5 359 360 359 1,787 1,788 1,788 147 147 147 0 0 February 6 360 362 361 1,788 1,788 1,788 147 147 147 0 0 February 7 362 364 363 1,788 1,788 1,788 147 147 147 0 0 February 8 364 366 365 1,788 1,789 1,789 147 148 148 0 0 February 9 366 368 367 1,789 1,789 1,789 148 148 148 0 0 February 10 367 370 369 1,788 1,789 1,789 148 148 148 0 0 February 11 369 372 370 1,788 1,789 1,788 147 148 147 0 0 February 12 371 373 372 1,788 1,788 1,788 147 148 147 0 0 February 13 373 376 374 1,788 1,789 1,788 147 148 148 0 0 February 14 375 377 376 1,788 1,789 1,788 147 148 148 0 0 February 15 377 379 378 1,788 1,788 1,788 147 147 147 0 0 February 16 379 381 380 1,788 1,788 1,788 147 148 147 0 0 February 17 381 383 382 1,788 1,789 1,788 147 148 148 0 0 February 18 383 385 384 1,788 1,789 1,789 148 148 148 0 0 February 19 385 387 386 1,788 1,789 1,789 148 148 148 0 0 February 20 386 389 388 1,788 1,789 1,789 147 148 148 0 0 February 21 388 391 390 1,787 1,788 1,788 146 148 147 0 0 February 22 390 393 391 1,786 1,787 1,786 145 146 146 0 0 February 23 392 395 393 1,786 1,788 1,787 146 148 147 0 0 February 24 394 397 395 1,788 1,789 1,789 148 149 148 0 0 February 25 376 833 411 1,788 1,827 1,792 148 162 152 0 0 February 26 383 389 385 1,789 1,790 1,790 148 150 149 0 0 February 27 383 384 383 1,789 1,790 1,790 148 148 148 0 0 February 28 382 383 382 1,789 1,790 1,789 147 148 148 0 0 March 1 382 382 382 1,789 1,789 1,789 147 147 147 0 0 March 2 381 382 382 1,789 1,789 1,789 147 147 147 0 0 March 3 381 382 381 1,789 1,789 1,789 147 148 147 0 0 March 4 380 381 380 1,788 1,789 1,789 146 147 147 0 0 March 5 379 380 380 1,787 1,788 1,787 145 146 146 0 0 March 6 379 380 380 1,787 1,789 1,788 146 147 146 0 0 March 7 379 380 379 1,788 1,789 1,789 147 148 148 0 0 March 8 380 381 380 1,789 1,790 1,790 148 148 148 0 0 March 9 380 380 380 1,789 1,790 1,790 148 148 148 0 0 March 10 379 380 380 1,789 1,790 1,789 147 148 148 0 0 March 11 379 380 380 1,789 1,790 1,790 148 148 148 0 0 March 12 379 380 379 1,789 1,790 1,790 148 148 148 0 0 March 13 379 379 379 1,789 1,790 1,789 147 148 148 0 0 March 14 379 379 379 1,789 1,790 1,790 148 148 148 0 0 Eni Petroleum, Alaska Page | 13 March 15 378 379 379 1,789 1,790 1,789 147 148 147 0 0 March 16 378 379 378 1,789 1,789 1,789 147 147 147 0 0 March 17 377 378 378 1,789 1,789 1,789 147 147 147 0 0 March 18 377 378 378 1,788 1,789 1,789 147 147 147 0 0 March 19 377 378 377 1,788 1,789 1,789 147 147 147 0 0 March 20 378 379 378 1,789 1,789 1,789 147 148 148 0 0 March 21 378 379 379 1,789 1,790 1,789 147 148 148 0 0 March 22 379 379 379 1,789 1,790 1,789 147 148 148 0 0 March 23 378 379 379 1,789 1,789 1,789 147 148 148 0 0 March 24 378 379 379 1,789 1,790 1,789 148 148 148 0 0 March 25 378 379 379 1,789 1,790 1,789 147 148 148 0 0 March 26 378 379 379 1,789 1,790 1,789 147 148 147 0 0 March 27 378 379 379 1,789 1,790 1,790 148 148 148 0 0 March 28 378 379 379 1,789 1,790 1,789 148 148 148 0 0 March 29 378 379 378 1,789 1,789 1,789 147 148 147 0 0 March 30 378 379 378 1,789 1,789 1,789 147 147 147 0 0 March 31 378 379 378 1,789 1,789 1,789 147 148 147 0 0 April 1 377 378 378 1,789 1,789 1,789 147 148 148 0 0 April 2 377 377 377 1,788 1,789 1,789 147 148 147 0 0 April 3 377 378 377 1,789 1,789 1,789 147 148 148 0 0 April 4 377 378 377 1,788 1,789 1,789 147 148 148 0 0 April 5 377 378 378 1,788 1,789 1,788 147 147 147 0 0 April 6 377 378 378 1,788 1,788 1,788 147 147 147 0 0 April 7 378 378 378 1,788 1,789 1,788 147 148 147 0 0 April 8 378 379 378 1,788 1,789 1,788 147 147 147 0 0 April 9 378 379 378 1,788 1,789 1,788 147 147 147 0 0 April 10 378 379 379 1,788 1,789 1,788 147 147 147 0 0 April 11 379 380 379 1,788 1,788 1,788 147 147 147 0 0 April 12 379 380 380 1,788 1,788 1,788 147 147 147 0 0 April 13 380 381 380 1,788 1,789 1,788 147 148 147 0 0 April 14 381 383 382 1,788 1,789 1,788 147 147 147 0 0 April 15 383 385 384 1,788 1,789 1,788 147 147 147 0 0 April 16 385 387 386 1,788 1,789 1,788 147 148 147 0 0 April 17 387 390 388 1,788 1,789 1,789 147 148 148 0 0 April 18 389 392 390 1,788 1,789 1,788 147 148 147 0 0 April 19 391 393 392 1,788 1,788 1,788 147 147 147 0 0 April 20 393 395 394 1,788 1,789 1,788 147 147 147 0 0 April 21 395 397 396 1,788 1,789 1,788 147 148 147 0 0 April 22 397 399 398 1,788 1,789 1,788 147 148 148 0 0 April 23 399 401 400 1,788 1,789 1,788 147 148 148 0 0 April 24 401 403 402 1,788 1,789 1,788 147 148 148 0 0 Eni Petroleum, Alaska Page | 14 April 25 402 405 404 1,788 1,789 1,788 147 148 148 0 0 April 26 404 406 405 1,788 1,789 1,788 147 147 147 0 0 April 27 406 408 407 1,788 1,789 1,788 147 148 147 0 0 April 28 408 410 409 1,788 1,789 1,788 147 148 148 0 0 April 29 410 412 411 1,788 1,789 1,788 147 148 147 0 0 April 30 412 414 413 1,788 1,788 1,788 147 147 147 0 0 May 1 413 415 414 1,788 1,788 1,788 147 148 147 0 0 May 2 415 417 416 1,788 1,789 1,788 147 148 148 0 0 May 3 417 419 418 1,788 1,789 1,789 148 148 148 0 0 May 4 419 421 420 1,788 1,789 1,789 148 148 148 0 0 May 5 421 423 422 1,788 1,789 1,789 148 148 148 0 0 May 6 423 424 424 1,788 1,789 1,789 148 148 148 0 0 May 7 424 426 425 1,789 1,789 1,789 148 148 148 0 0 May 8 426 428 427 1,789 1,789 1,789 148 148 148 0 0 May 9 427 429 428 1,789 1,789 1,789 148 148 148 0 0 May 10 429 431 430 1,789 1,789 1,789 148 148 148 0 0 May 11 431 434 432 1,789 1,789 1,789 148 148 148 0 0 May 12 433 436 434 1,789 1,789 1,789 148 148 148 0 0 May 13 435 438 437 1,789 1,789 1,789 148 148 148 0 0 May 14 438 440 439 1,789 1,789 1,789 148 149 148 0 0 May 15 440 442 441 1,789 1,789 1,789 148 149 149 0 0 May 16 442 444 443 1,789 1,789 1,789 148 149 149 0 0 May 17 444 446 445 1,789 1,789 1,789 148 149 148 0 0 May 18 445 448 446 1,789 1,790 1,789 149 149 149 0 0 May 19 447 449 448 1,789 1,790 1,789 149 149 149 0 0 May 20 449 451 450 1,789 1,790 1,789 149 149 149 0 0 May 21 450 453 451 1,789 1,790 1,790 149 149 149 0 0 May 22 452 454 453 1,789 1,790 1,790 149 149 149 0 0 May 23 454 456 455 1,789 1,790 1,790 149 149 149 0 0 May 24 456 458 457 1,789 1,790 1,790 149 149 149 0 0 May 25 458 460 459 1,789 1,789 1,789 149 149 149 0 0 May 26 459 461 460 1,789 1,790 1,789 149 149 149 0 0 May 27 460 462 461 1,790 1,790 1,790 149 149 149 0 0 May 28 462 464 463 1,790 1,790 1,790 149 149 149 0 0 May 29 464 466 465 1,790 1,790 1,790 149 150 149 0 0 May 30 466 468 467 1,790 1,790 1,790 149 149 149 0 0 May 31 467 470 469 1,789 1,790 1,789 148 149 149 0 0 June 1 469 471 470 1,789 1,789 1,789 148 149 149 0 0 June 2 471 473 472 1,789 1,789 1,789 148 149 149 0 0 June 3 473 475 474 1,789 1,789 1,789 149 149 149 0 0 June 4 475 477 476 1,789 1,789 1,789 149 149 149 0 0 Eni Petroleum, Alaska Page | 15 June 5 477 479 478 1,789 1,790 1,789 149 149 149 0 0 June 6 478 480 480 1,789 1,790 1,790 149 149 149 0 0 June 7 480 482 481 1,789 1,790 1,790 149 149 149 0 0 June 8 482 484 483 1,789 1,790 1,789 149 149 149 0 0 June 9 484 486 485 1,789 1,789 1,789 149 149 149 0 0 June 10 486 1,456 584 1,789 1,905 1,801 149 266 177 0 0 June 11 473 507 484 1,792 1,794 1,792 154 165 158 0 0 June 12 466 473 469 1,792 1,793 1,793 152 154 153 0 0 June 13 462 466 464 1,793 1,793 1,793 151 152 152 0 0 June 14 461 463 461 1,793 1,794 1,794 151 151 151 0 0 June 15 459 461 460 1,793 1,794 1,794 150 151 151 0 0 June 16 458 460 459 1,793 1,794 1,793 150 150 150 0 0 June 17 457 458 458 1,793 1,794 1,793 150 150 150 0 0 June 18 456 458 457 1,793 1,794 1,793 150 150 150 0 0 June 19 455 456 456 1,793 1,794 1,794 150 150 150 0 0 June 20 455 456 455 1,794 1,794 1,794 150 151 150 0 0 June 21 454 456 455 1,794 1,794 1,794 150 150 150 0 0 June 22 454 455 454 1,794 1,794 1,794 150 150 150 0 0 June 23 453 454 454 1,793 1,794 1,794 149 150 150 0 0 June 24 453 454 453 1,793 1,794 1,793 149 150 149 0 0 June 25 453 454 453 1,793 1,794 1,794 150 150 150 0 0 June 26 453 454 453 1,794 1,794 1,794 149 150 150 0 0 June 27 453 454 454 1,793 1,794 1,794 149 150 150 0 0 June 28 453 454 454 1,794 1,794 1,794 150 150 150 0 0 June 29 453 454 453 1,794 1,794 1,794 149 150 150 0 0 June 30 453 454 453 1,794 1,794 1,794 150 150 150 0 0 July 1 453 453 453 1,794 1,794 1,794 150 150 150 0 0 July 2 453 453 453 1,794 1,794 1,794 150 150 150 0 0 July 3 452 453 453 1,794 1,794 1,794 150 150 150 0 0 July 4 452 453 452 1,794 1,795 1,794 150 151 150 0 0 July 5 452 453 452 1,794 1,795 1,794 150 151 150 0 0 July 6 451 452 452 1,794 1,795 1,795 151 151 151 0 0 July 7 451 452 452 1,794 1,795 1,795 151 151 151 0 0 July 8 451 452 452 1,794 1,795 1,794 150 151 150 0 0 July 9 451 452 452 1,794 1,794 1,794 150 150 150 0 0 July 10 451 452 451 1,794 1,794 1,794 150 151 150 0 0 July 11 451 451 451 1,794 1,795 1,795 150 151 151 0 0 July 12 451 451 451 1,794 1,795 1,795 151 151 151 0 0 July 13 451 451 451 1,795 1,795 1,795 151 151 151 0 0 July 14 451 451 451 1,794 1,795 1,794 151 151 151 0 0 July 15 451 451 451 1,794 1,794 1,794 150 151 151 0 0 Eni Petroleum, Alaska Page | 16 July 16 451 451 451 1,794 1,795 1,794 151 151 151 0 0 July 17 451 451 451 1,794 1,795 1,794 151 151 151 0 0 July 18 450 451 451 1,794 1,795 1,795 151 151 151 0 0 July 19 450 451 451 1,794 1,795 1,795 151 151 151 0 0 July 20 450 451 450 1,794 1,795 1,795 151 151 151 0 0 July 21 450 450 450 1,795 1,795 1,795 151 152 151 0 0 July 22 449 450 450 1,795 1,795 1,795 151 152 152 0 0 July 23 449 450 450 1,795 1,796 1,795 152 152 152 0 0 July 24 449 450 449 1,795 1,795 1,795 151 152 152 0 0 July 25 449 450 449 1,795 1,795 1,795 151 151 151 0 0 July 26 448 449 449 1,795 1,795 1,795 151 152 151 0 0 July 27 448 449 449 1,795 1,795 1,795 151 152 151 0 0 July 28 448 449 449 1,795 1,795 1,795 151 152 152 0 0 July 29 448 449 449 1,795 1,795 1,795 152 152 152 0 0 July 30 448 449 448 1,795 1,795 1,795 152 152 152 0 0 July 31 448 449 448 1,795 1,795 1,795 152 152 152 0 0 August 1 448 448 448 1,795 1,795 1,795 152 152 152 0 0 August 2 447 448 448 1,795 1,795 1,795 152 152 152 0 0 August 3 447 448 448 1,795 1,795 1,795 152 152 152 0 0 August 4 447 448 447 1,795 1,795 1,795 152 152 152 0 0 August 5 447 448 447 1,795 1,795 1,795 152 152 152 0 0 August 6 447 447 447 1,795 1,796 1,796 152 153 152 0 0 August 7 446 447 447 1,796 1,796 1,796 152 153 153 0 0 August 8 447 447 447 1,795 1,796 1,796 152 152 152 0 0 August 9 446 447 447 1,795 1,795 1,795 152 152 152 0 0 August 10 446 447 446 1,795 1,795 1,795 152 152 152 0 0 August 11 446 447 446 1,795 1,795 1,795 152 152 152 0 0 August 12 446 447 446 1,795 1,795 1,795 152 152 152 0 0 August 13 446 446 446 1,795 1,795 1,795 152 152 152 0 0 August 14 446 446 446 1,795 1,795 1,795 152 152 152 0 0 August 15 445 446 446 1,795 1,795 1,795 152 152 152 0 0 August 16 445 446 446 1,795 1,795 1,795 152 152 152 0 0 August 17 445 446 446 1,795 1,796 1,795 152 152 152 0 0 August 18 445 446 445 1,795 1,796 1,795 152 152 152 0 0 August 19 445 446 445 1,795 1,795 1,795 152 152 152 0 0 August 20 444 445 445 1,795 1,795 1,795 152 152 152 0 0 August 21 444 445 445 1,795 1,795 1,795 152 152 152 0 0 August 22 444 444 444 1,795 1,795 1,795 152 152 152 0 0 August 23 444 445 444 1,795 1,796 1,795 152 152 152 0 0 August 24 444 444 444 1,795 1,795 1,795 152 152 152 0 0 August 25 443 444 443 1,795 1,795 1,795 152 152 152 0 0 Eni Petroleum, Alaska Page | 17 August 26 443 444 444 1,795 1,795 1,795 152 152 152 0 0 August 27 443 445 444 1,795 1,795 1,795 151 152 152 0 0 August 28 444 445 445 1,795 1,795 1,795 152 152 152 0 0 August 29 445 445 445 1,795 1,795 1,795 152 152 152 0 0 August 30 445 445 445 1,795 1,795 1,795 152 152 152 0 0 August 31 444 445 445 1,795 1,795 1,795 152 152 152 0 0 September 1 444 445 444 1,795 1,795 1,795 152 152 152 0 0 September 2 323 951 484 1,795 1,832 1,799 152 164 156 0 0 September 3 454 459 456 1,796 1,796 1,796 152 153 153 0 0 September 4 453 454 453 1,796 1,796 1,796 152 153 153 0 0 September 5 452 453 452 1,796 1,796 1,796 152 153 152 0 0 September 6 451 452 452 1,796 1,796 1,796 152 152 152 0 0 September 7 451 452 451 1,796 1,796 1,796 152 152 152 0 0 September 8 451 451 451 1,796 1,796 1,796 152 152 152 0 0 September 9 450 451 451 1,796 1,796 1,796 152 152 152 0 0 September 10 450 451 450 1,796 1,796 1,796 152 152 152 0 0 September 11 450 450 450 1,796 1,796 1,796 152 152 152 0 0 September 12 450 450 450 1,796 1,796 1,796 152 152 152 0 0 September 13 450 450 450 1,796 1,796 1,796 152 152 152 0 0 September 14 449 450 450 1,796 1,796 1,796 152 153 152 0 0 September 15 449 450 449 1,796 1,796 1,796 152 152 152 0 0 September 16 448 449 449 1,796 1,796 1,796 152 152 152 0 0 September 17 448 449 448 1,796 1,796 1,796 152 152 152 0 0 September 18 447 448 448 1,796 1,796 1,796 152 152 152 0 0 September 19 447 448 447 1,796 1,796 1,796 152 152 152 0 0 September 20 446 447 447 1,796 1,796 1,796 152 152 152 0 0 September 21 446 447 446 1,796 1,796 1,796 152 152 152 0 0 September 22 446 446 446 1,796 1,796 1,796 152 152 152 0 0 September 23 445 446 446 1,795 1,796 1,796 152 152 152 0 0 September 24 445 446 445 1,795 1,796 1,796 152 152 152 0 0 September 25 445 446 445 1,795 1,796 1,796 152 152 152 0 0 September 26 445 446 445 1,795 1,796 1,796 152 152 152 0 0 September 27 445 446 445 1,796 1,796 1,796 152 152 152 0 0 September 28 445 446 445 1,796 1,796 1,796 152 152 152 0 0 September 29 445 445 445 1,796 1,796 1,796 152 152 152 0 0 September 30 445 445 445 1,796 1,796 1,796 152 152 152 0 0 October 1 445 445 445 1,796 1,796 1,796 152 152 152 0 0 October 2 444 445 445 1,796 1,796 1,796 152 152 152 0 0 October 3 444 445 445 1,795 1,796 1,796 152 152 152 0 0 October 4 444 445 445 1,795 1,796 1,796 152 152 152 0 0 October 5 444 445 445 1,795 1,796 1,796 151 152 152 0 0 Eni Petroleum, Alaska Page | 18 October 6 444 445 444 1,795 1,796 1,795 151 152 152 0 0 October 7 444 445 444 1,795 1,796 1,795 151 152 152 0 0 October 8 444 444 444 1,795 1,796 1,795 151 152 151 0 0 October 9 444 444 444 1,795 1,796 1,795 151 151 151 0 0 October 10 443 444 444 1,795 1,796 1,795 151 151 151 0 0 October 11 443 444 444 1,795 1,796 1,795 151 152 151 0 0 October 12 443 444 444 1,795 1,796 1,795 151 152 151 0 0 October 13 443 444 444 1,795 1,796 1,795 151 152 151 0 0 October 14 443 444 444 1,795 1,796 1,795 151 152 151 0 0 October 15 444 444 444 1,795 1,796 1,796 151 152 151 0 0 October 16 444 444 444 1,795 1,796 1,796 151 152 151 0 0 October 17 443 444 444 1,795 1,796 1,795 151 152 151 0 0 October 18 443 444 444 1,795 1,796 1,795 151 152 151 0 0 October 19 443 444 444 1,795 1,796 1,795 151 152 151 0 0 October 20 444 444 444 1,795 1,796 1,795 151 151 151 0 0 October 21 444 444 444 1,795 1,796 1,795 151 152 152 0 0 October 22 444 444 444 1,796 1,796 1,796 151 152 152 0 0 October 23 444 444 444 1,795 1,796 1,795 151 152 151 0 0 October 24 444 444 444 1,795 1,796 1,796 151 152 152 0 0 October 25 444 444 444 1,796 1,796 1,796 151 152 152 0 0 October 26 444 444 444 1,795 1,796 1,796 151 152 151 0 0 October 27 444 444 444 1,796 1,796 1,796 151 152 152 0 0 October 28 444 444 444 1,796 1,796 1,796 151 152 152 0 0 October 29 444 444 444 1,796 1,796 1,796 151 152 151 0 0 October 30 443 444 444 1,795 1,796 1,796 151 152 151 0 0 October 31 443 444 443 1,796 1,796 1,796 151 152 151 0 0 November 1 443 444 443 1,796 1,796 1,796 151 152 151 0 0 November 2 443 444 443 1,796 1,796 1,796 151 152 151 0 0 November 3 443 444 443 1,795 1,796 1,796 151 151 151 0 0 November 4 443 443 443 1,795 1,796 1,795 151 151 151 0 0 November 5 443 443 443 1,795 1,795 1,795 151 151 151 0 0 November 6 443 443 443 1,795 1,795 1,795 151 151 151 0 0 November 7 442 443 443 1,795 1,795 1,795 151 151 151 0 0 November 8 442 443 443 1,795 1,795 1,795 151 151 151 0 0 November 9 442 443 442 1,795 1,795 1,795 150 151 150 0 0 November 10 442 443 442 1,795 1,795 1,795 150 151 151 0 0 November 11 442 443 442 1,795 1,796 1,795 151 151 151 0 0 November 12 442 443 442 1,795 1,796 1,795 150 151 151 0 0 November 13 442 442 442 1,795 1,795 1,795 150 151 151 0 0 November 14 442 442 442 1,795 1,796 1,795 151 151 151 0 0 November 15 442 442 442 1,795 1,796 1,795 151 151 151 0 0 Eni Petroleum, Alaska Page | 19 November 16 442 442 442 1,795 1,796 1,795 151 151 151 0 0 November 17 442 442 442 1,795 1,796 1,795 151 151 151 0 0 November 18 441 442 442 1,795 1,795 1,795 151 151 151 0 0 November 19 441 442 442 1,795 1,795 1,795 151 151 151 0 0 November 20 441 442 441 1,795 1,795 1,795 151 151 151 0 0 November 21 441 442 441 1,795 1,795 1,795 151 151 151 0 0 November 22 441 441 441 1,795 1,795 1,795 150 151 151 0 0 November 23 441 442 441 1,795 1,795 1,795 150 151 151 0 0 November 24 441 442 441 1,795 1,795 1,795 150 151 151 0 0 November 25 441 441 441 1,795 1,795 1,795 150 151 151 0 0 November 26 441 441 441 1,795 1,796 1,795 151 152 151 0 0 November 27 441 441 441 1,796 1,796 1,796 151 152 151 0 0 November 28 440 441 441 1,795 1,796 1,795 150 152 151 0 0 November 29 441 441 441 1,795 1,796 1,795 151 151 151 0 0 November 30 440 441 441 1,795 1,795 1,795 151 151 151 0 0 December 1 440 441 441 1,795 1,795 1,795 150 151 151 0 0 December 2 440 441 441 1,795 1,795 1,795 150 151 150 0 0 December 3 440 441 441 1,795 1,795 1,795 150 151 150 0 0 December 4 440 441 441 1,795 1,795 1,795 150 151 151 0 0 December 5 440 441 441 1,795 1,795 1,795 150 151 150 0 0 December 6 440 441 441 1,795 1,795 1,795 150 151 150 0 0 December 7 440 441 441 1,795 1,795 1,795 150 150 150 0 0 December 8 440 441 441 1,795 1,795 1,795 150 150 150 0 0 December 9 440 441 440 1,795 1,795 1,795 150 150 150 0 0 December 10 440 441 440 1,795 1,795 1,795 150 150 150 0 0 December 11 440 441 440 1,795 1,795 1,795 150 150 150 0 0 December 12 440 441 440 1,795 1,795 1,795 150 150 150 0 0 December 13 440 441 440 1,795 1,795 1,795 150 150 150 0 0 December 14 440 441 440 1,795 1,795 1,795 150 150 150 0 0 December 15 440 440 440 1,795 1,795 1,795 150 150 150 0 0 December 16 440 440 440 1,795 1,795 1,795 150 150 150 0 0 December 17 440 440 440 1,795 1,795 1,795 150 150 150 0 0 December 18 439 440 440 1,794 1,795 1,795 150 150 150 0 0 December 19 440 440 440 1,794 1,795 1,795 150 150 150 0 0 December 20 439 440 440 1,794 1,795 1,795 150 150 150 0 0 December 21 439 440 440 1,794 1,795 1,795 150 150 150 0 0 December 22 439 440 440 1,794 1,795 1,795 150 150 150 0 0 December 23 439 440 439 1,794 1,795 1,795 149 150 150 0 0 December 24 439 439 439 1,794 1,795 1,794 149 150 150 0 0 December 25 439 440 439 1,794 1,795 1,794 149 150 150 0 0 December 26 439 439 439 1,794 1,795 1,795 150 150 150 0 0 Eni Petroleum, Alaska Page | 20 December 27 439 439 439 1,794 1,795 1,795 150 150 150 0 0 December 28 439 439 439 1,794 1,795 1,794 149 150 149 0 0 December 29 439 439 439 1,794 1,795 1,794 149 150 150 0 0 December 30 439 439 439 1,794 1,795 1,794 150 150 150 0 0 December 31 439 439 439 1,794 1,795 1,794 149 150 150 0 0 0 0 Notes for Highlighted Dates Above: 1/4/2023 Wellhead testing and maintenance 1/10/2023 Suspect shallow ice plug forming, pumped 8 bbls methanol down tubing 2/25/2023 Suspect shallow ice plug forming, pumped 5 bbls methanol down tubing 6/10/2023 Suspect shallow ice plug forming, pumped 5 bbls methanol down tubing and 38 bbls diesel 9/2/2023 Pump 5 bbls diesel down the tubing to verify freeze protect
