Tracey J. Mercier Cheryl A. Woodall Geoffrey S. Ellis Thomas M. Finn Phuong A. Le Kristen R. Marra Heidi M. Leathers-Miller Ronald M. Drake II Christopher J. Schenk 2021 <p class="Default">Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 13.4 billion barrels of oil and 244.4 trillion cubic feet of gas in nine geologic provinces of China.</p> application/pdf 10.3133/fs20213051 en U.S. Geological Survey Assessment of undiscovered conventional oil and gas resources of China, 2020 reports