1. State Key Laboratory of Shale Oil and Gas Enrichment and Effective Development Wuxi 214126 Jiangsu China
2. Wuxi Research Institute of Petroleum GeologySinopec Exploration and Production Research Institute Wuxi 214126 Jiangsu China
3. Unconventional Natural Gas InstituteChina University of Petroleum Beijing 102249 China
4. College of Earth ScienceJilin University Changchun 130012 China
5. Shandong Provincial Key Laboratory of Depositional Mineralization & Sedimentary MineralShandong University of Science and Technology Qingdao 266590 China
6. Gas Hydrate Engineering Technology CenterGuangzhou Marine Geological Survey Guangzhou 510075 China