Christopher J. Schenk Janet K. Pitman Timothy R. Klett Marilyn E. Tennyson Stephanie B. Gaswirth Heidi M. Leathers-Miller Thomas M. Finn Michael E. Brownfield Tracey J. Mercier Kristen R. Marra Cheryl A. Woodall Christopher J. Potter 2018 <p>Using a geology-based assessment methodology, the U.S. Geological Survey estimated mean undiscovered, technically recoverable resources of 3.3 billion barrels of oil and 887 billion cubic feet of gas in shale reservoirs of the Upper Cretaceous Qingshankou and Nenjiang Formations in the Songliao Basin of northeastern China.</p> application/pdf 10.3133/fs20183014 en U.S. Geological Survey Assessment of undiscovered continuous oil and gas resources of Upper Cretaceous Shales in the Songliao Basin of China, 2017 reports