1. School of Energy Resources, China University of Geosciences, Beijing 100083, China
2. Key Laboratory of Strategy Evaluation for Shale Gas, Ministry of Natural Resources, Beijing 100083, China
3. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
4. Coal Reservoir Laboratory of National Engineering Research Center of Coalbed Methane Development & Utilization, Beijing 100083, China
5. Sinopec Exploration Company, Chengdu 610041, Sichuan, China
6. Beijing Research Institute of Uranium Geology, Beijing 100029, China