1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing 102249, China
2. College of Geosciences, China University of Petroleum (Beijing), Beijing 102249, China
3. Research Institute of Petroleum Exploration and Development, Beijing 100083, China
4. Research Institute of Petroleum Exploration and Development, Dagang Oilfield Company, CNPC, Tianjin 300280, China