Stephanie B. Gaswirth Christopher J. Schenk Heidi M. Leathers-Miller Timothy R. Klett Tracey J. Mercier Phuong A. Le Marilyn E. Tennyson Thomas M. Finn Sarah J. Hawkins Michael E. Brownfield Kristen R. Marra 2017 <p>Using a geology-based assessment methodology, the U.S. Geological Survey estimated mean resources of 4.2 billion barrels of oil and 3.1 trillion cubic feet of gas in the Spraberry Formation of the Midland Basin, Permian Basin Province, Texas.</p> application/pdf 10.3133/fs20173029 en U.S. Geological Survey Assessment of undiscovered oil and gas resources in the Spraberry Formation of the Midland Basin, Permian Basin Province, Texas, 2017 reports