Colin A. Doolan Matthew D. Merrill William H. Craddock Rand Gardner Christopher P. Anderson Phuong A. Le Tracey J. Mercier Christopher J. Schenk Celeste D. Lohr 2026 <p class="MsoNormal">Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean conventional resources of 12 million barrels of oil and 184 billion cubic feet of gas in the Buda Limestone of Texas.</p> application/pdf 10.3133/fs20263015 en U.S. Geological Survey Assessment of undiscovered conventional oil and gas resources in the Buda Limestone of Texas, 2025 reports