1. China University of Petroleum (Beijing), State Key Laboratory of Petroleum Resources and Prospecting, Beijing 102249, China and China University of Petroleum (Beijing), College of Geosciences, Beijing 102249, China.(corresponding author).
2. China University of Petroleum (Beijing), College of Geosciences, Beijing 102249, China..
3. PetroChina Dagang Oilfield Company, CNPC, Second Oil Production Plant, Tianjin 300280, China..
4. University of Oklahoma, School of Geosciences, Norman, Oklahoma 73019, USA..