1The CBM Exploration and Development Pilot Test Base of CNPC, Renqiu, Hebei, 062550, China
2Exploration and Development Research Institute of Huabei Oilfield Company, Renqiu, Hebei, 062550, China
3School of Energy Resources, China University of Geosciences, Beijing, 100083, China
4Sichuan Province Key Laboratory of Shale Gas Evaluation and Exploitation, Chengdu, Sichuan, 610091, China
5Sichuan Keyuan Testing Center of Engineering Technology, Chengdu, Sichuan, 610091, China
6Coalbed Methane Division of Huabei Oilfield Company, Renqiu, Hebei, 062550, China