Southwest Petroleum University - State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Southwest Petroleum University - State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, China National Petroleum Corporation (CNPC) - Shale Gas Research Institute and Southwest Petroleum University - State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation