1. Engineering Technoleogy Research Institute, PetroChina Coalbed Methane Company Limited, Xi’an 710082, China
2. China United Coalbed Methane National Engineering Research Center Co. Ltd., Beijing 100095, China
3. National Key Laboratory of Continental Shale Oil, Northeast Petroleum University, Daqing, Heilongjiang 163318, China
4. Institute of Unconventional Oil & Gas, Northeast Petroleum University, Daqing 163318, China
5. Department of Petroleum Engineering, China University of Petroleum-Beijing, Beijing 102249, China