1. School of Science, Qingdao University of Technology, Qingdao 266033, China
2. Key Laboratory of Gas Hydrate, Ministry of Natural Resources, Qingdao Institute of Marine Geology, Qingdao, Shandong 266071, China
3. College of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
4. Geo-Energy Research Institute, Faculty of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, Shandong China