Timothy R. Klett Christopher J. Schenk Michael E. Brownfield Stephanie B. Gaswirth Phuong A. Le Heidi M. Leathers-Miller Kristen R. Marra Tracey J. Mercier Ronald R. Charpentier 2016 <p>Using a geology-based assessment methodology, the U.S. Geological Survey estimated mean resources of 28 trillion cubic feet of tight gas and 5.6 trillion cubic feet of coalbed gas in upper Paleozoic rocks in the Ordos Basin Province, China.</p> application/pdf 10.3133/fs20153087 en U.S. Geological Survey Assessment of undiscovered continuous gas resources of the Ordos Basin Province, China, 2015 reports