1. 1National Key Laboratory of Petroleum Resources and Engineering, China University of Petroleum, Beijing 102249, China
2. 2Unconventional Petroleum Research Institute, China University of Petroleum, Beijing 102249, China
3. 3Key Laboratory of Unconventional Natural Gas Evaluation and Development in Complex Tectonic Areas, Ministry of Natural Resources, Guiyang 550004, China
4. 4Guizhou Engineering Research Institute of Oil & Gas Exploration and Development, Guiyang 550004, China
5. 5PetroChina Hangzhou Research Institute of Geology, Hangzhou 310023, China
6. 6PetroChina Coalbed Methane Company Limited, Beijing 100028, China
7. 7State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China