Tracey J. Mercier Phuong A. Le Andrea D. Cicero Sarah E. Gelman Jane S. Hearon Benjamin G. Johnson Jenny H. Lagesse Heidi M. Leathers-Miller Christopher J. Schenk 2026 <p class="MsoNormal"><span>Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean continuous resources of 519 million barrels of oil and 82.9 trillion cubic feet of gas in the Amu Darya Basin Province of Turkmenistan, Uzbekistan, and Afghanistan.</span></p> application/pdf 10.3133/fs20263013 en U.S. Geological Survey Assessment of undiscovered continuous oil and gas resources in the Amu Darya Basin Province of Turkmenistan, Uzbekistan, and Afghanistan, 2026 reports