Tracey J. Mercier Cheryl A. Woodall Thomas M. Finn Heidi M. Leathers-Miller Michael E. Brownfield Phuong A. Le Stephanie B. Gaswirth Marilyn E. Tennyson Christopher J. Schenk 2026 <p class="MsoNormal">Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean conventional resources of 419 million barrels of oil and 5.5 trillion cubic feet of gas in the Berkine, Illizi, Hamra, Murzuq, and Erdis Kufra Basins of northern Africa.</p> application/pdf 10.3133/fs20263009 en U.S. Geological Survey Assessment of undiscovered conventional oil and gas resources in the Berkine, Illizi, Hamra, Murzuq, and Erdis Kufra Basins of northern Africa, 2026 reports