School of Energy and Resources;
China University of Geoscience;
Beijing 100083;
China;
MOE Key Lab of Marine Reservoir Evolution and Hydrocarbon Accumulation Mechanism;
China University of Geoscience;
Beijing 100083;
China;
Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering;
Beijing 100083;
China;
China United Coalbed Methane Corporation Ltd.;
Beijing 100011;
China;
coalbed; methane; pressure; prediction; equivalent; drainage; area; influencing; factors; pressure; drop; types; Qinshui; Basin;