88 Energy raises South Prudhoe resource estimate 35% to 768.9 million barrels

Could a bigger South Prudhoe estimate mean more North Slope jobs, contractor work and borough revenue, or is it still just speculative geology? 88 Energy’s new answer is bigger on paper: the company raised its gross unrisked 2U prospective resource estimate to 768.9 million barrels of oil and natural gas liquids, up about 35% from its earlier view, but the acreage still has to clear several hurdles before Prudhoe-area residents see any economic impact.

The revised figure came after fresh geophysical work, including analysis of Schrader Bluff 3D seismic velocity data, and it adds a maiden Brookian estimate in the North-West Hub while boosting the Ivishak outlook at the Augusta prospect. 88 Energy now says the North-West Hub carries 301.3 million barrels gross unrisked and the South-East Hub 467.6 million barrels gross unrisked, with the North-West Hub’s Brookian target, split between West Sak and Upper Schrader Bluff, estimated at 181.5 million barrels and its Ivishak resource at 69.9 million barrels. The company says Augusta-1 could test up to 133.7 million barrels across Ivishak, Kuparuk and Brookian intervals.

That language matters. Gross unrisked 2U prospective resource is not proven reserves and does not mean barrels are ready to flow. It is a geological estimate that assumes success before drilling, and the North Slope has seen many prospects look large on a map before a rig ever arrives. For South Prudhoe, the practical next steps are a farm-out, final well placement and then a test well, which 88 Energy says it expects to lock in by mid-2026 while multiple parties evaluate participation.

The acreage itself is in one of the most established oil corridors in North America, immediately south of Prudhoe Bay and the Kuparuk River units. 88 Energy’s February update put the South Prudhoe lease position at about 52,269 acres, with 100% working interest and a 16.7% royalty. The company became the high bidder on 10 leases covering about 25,600 contiguous acres in November 2022 and received formal award in April 2023. It also points to the historical Hemi Springs Unit #3 well drilled by ARCO in 1985, where modern log analysis indicated more than 200 feet of net pay in the Upper Schrader Bluff reservoir.

For now, the main economic signal is still future-facing. 88 Energy says it is targeting farm-out financing rather than self-funding the next well, with drilling on Augusta penciled for the first quarter of 2027 if partners and capital come through. If that happens, the work would ripple through the same infrastructure web that supports Prudhoe Bay, Kuparuk, Deadhorse and the Dalton Highway, the 415-mile haul road built for oilfield development. Until then, the larger estimate is a sharper bet, not a local boom.