1. Xi’an Shiyou University, Xi’an710065, China
2. Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil & Gas Reservoirs, Xi’an710065, China
3. Engineering Research Center of Development and Management for Low to Ultra-low Permeability Oil & Gas Reservoirs in West China (Ministry of Education), Xi’an710065, China
4. PetroChina Coalbed Methane Company Limited, Beijing100028, China
5. China University of Petroleum-Beijing, Beijing102249, China
6. China National Offshore Oil Corp-Tianjin, Tianjin300451, China
7. Shaanxi Yanchang Petroleum (Group) Co., Ltd, Yanan716000, China
8. Changqing Oilfield Branch of CNPC, Xi’an710018, China
9. Changqing Drilling Company of CNPC Chuanqing Drilling Engineering Co., Ltd, Xi’an710021, China