1. School of Geosciences, China University of Petroleum (East China) , Qingdao, 266580 , China
2. Research Institute of Petroleum Exploration & Development , PetroChina, Beijing, 100083 , China
3. Pilot National Laboratory for Marine Science and Technology (Qingdao) , Qingdao, 266580 , China
4. Shandong Provincial Key Laboratory of Deep Oil and Gas , Qingdao, 266580 , China