1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China;
2. Xi’an Key Laboratory of Tight Oil (Shale Oil) Development, Xi'an Shiyou University, Xi’an, Shaanxi 710065, China
3. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
4. Department of Petroleum Engineering, Texas A&M University, College Station, TX 77843