1. State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
2. University of Chinese Academy of Sciences, Beijing 100049, China
3. Key Laboratory of Natural Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
4. Research Institute of Petroleum Exploration & Development, Beijing 100083, China
5. CAS Center for Excellence in Deep Earth Science, Guangzhou 510640, China