BOEM Estimates 65 Billion Barrels of Undiscovered Oil on U.S. Outer Continental Shelf

The federal agency responsible for managing America's offshore energy resources put a precise number on what remains untapped beneath the outer continental shelf: 65.80 billion barrels of undiscovered oil and 218.43 trillion cubic feet of natural gas, according to the 2026 National Assessment released March 9 by the Bureau of Ocean Energy Management.

For North Slope Borough, where offshore energy development in Alaska's federal waters sits at the center of long-running debates over economic sovereignty, environmental stewardship, and Indigenous rights, the assessment's release carries particular weight. BOEM's five-year assessments shape the federal leasing agenda that directly affects decisions made on and around the Arctic Outer Continental Shelf.

Using what BOEM calls a play-based assessment methodology, the agency calculated a mean Undiscovered Technically Recoverable Resource across all U.S. Outer Continental Shelf regions outside of known oil and gas fields. The agency framed the total as representing the potential for 100 or more years of energy production from the shelf, based on current production trends.

"The Outer Continental Shelf holds tremendous resource potential," said BOEM Acting Director Matt Giacona. "This report provides the foundation for decisions that will ensure affordable energy and robust energy security for generations of Americans."

BOEM characterizes the assessment as a comprehensive appraisal built on rigorous analysis of the best scientific data and information available, building on prior OCS assessments published at five-year intervals. The agency says the report identifies opportunities for additional offshore exploration and development while supporting economic prosperity, lower energy costs, and job creation.

Several significant gaps remain in the publicly released material. BOEM has not provided regional or play-level breakdowns in the press release, meaning the specific share of those 65.80 billion barrels attributable to Alaska's offshore areas, including the Chukchi Sea and Beaufort Sea, is not yet publicly detailed. The release also does not include probabilistic ranges showing the spread of uncertainty around the mean estimates, nor does it specify the price assumptions that underpin the "economically recoverable" designation.

The assessment is published every five years and is intended to provide policymakers and industry stakeholders with an updated picture to guide offshore exploration and development decisions. BOEM directs the public to its website for the full report.

The full play-level and regional breakdowns, along with the underlying methodology documentation and any peer reviews, remain critical for understanding how Alaska's federal offshore waters factor into the headline totals.