1. Key Laboratory of Tectonics and Petroleum Resources Ministry of Education, China University of Geosciences, Wuhan 430074, China
2. Nepu Sanya Offshore Oil&Gas Research Institute, Sanya 572000, China
3. School of Earth Resources, China University of Geosciences, Wuhan 430074, China
4. PetroChina Coalbed Methane Company Limited, Beijing 100028, China
5. National Engineering Center of Coalbed Methane Exploration & Utilization, Beijing 100028, China
6. School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China
7. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
8. Institute of Unconventional Oil & Gas, Northeast Petroleum University, Daqing 163318, China