1. Key Laboratory of Shale Oil and Gas Enrichment Mechanism and Development, Sinopec Research Institute of Petroleum Engineering, Changping District, Beijing 100101, China
2. School of Engineering and Technology, China University of Geosciences (Beijing), Haidian District, Beijing 100083, China
3. The Sixth Geological Brigade of Shandong Bureau of Geology and Mineral Resources, Weihai City, Shandong Province, 264209, China