1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
2. Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, United States
3. Shale Gas Research Institute, Petro China Southwest Oil & Gasfield Company, Chengdu 610051, China
4. Northwest Oilfield Branch Company, Sinopec, Urumchi 830011, China