Tracey J. Mercier Cheryl A. Woodall Phuong A. Le Janet K. Pitman Ronald M. Drake II Michael E. Brownfield Stephanie B. Gaswirth Thomas M. Finn Christopher J. Schenk 2019 <p>Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 23.7 billion barrels of shale oil and 23 trillion cubic feet of associated gas in the onshore part of the Sirte Basin Province of Libya.</p> application/pdf 10.3133/fs20193028 en U.S. Geological Survey Assessment of shale-oil resources of the Sirte Basin Province, Libya, 2019 reports