1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Fuxue Road 18th, Beijing 102200, People’s Republic of China
2. National Engineering Laboratory for Offshore Oil Exploration, China University of Petroleum, Fuxue Road 18th, Beijing 102200, People’s Republic of China
3. Bureau of Economic Geology, John A. and Katherine G. Jackson School of Geosciences, The University of Texas at Austin, University Station, Box X, Austin, TX 78713-8924, USA