1. Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510075, China
2. National Engineering Research Center of Gas Hydrate Exploration and Development, China Geological Survey, Guangzhou 510075, China
3. Colledge of Construction Engineering, Jilin University, Changchun 130026, China
4. The Institute of Exploration Techniques, Chinese Academy of Geological Sciences, Langfang 065000, China
5. Beijing Institute of Exploration Engineering, Beijing 100083, China