1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, China
2. Natural Gas Geology Key Laboratory of Sichuan Province, Southwest Petroleum University, Chengdu, China
3. School of Geoscience and Technology, Southwest Petroleum University, Chengdu, China
4. Exploration, Development and Construction Branch of PetroChina Coalbed Methane Company Limited, Xi’an, China