Shoulei Wang
School of Energy Resources, China University of Geosciences, Beijing 100083, P.R. China

Zhiping Li
School of Energy Resources, China University of Geosciences, Beijing 100083, P.R. China

Sen Wang
School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China

Xiaodong Han
Tianjin Branch, China National Offshore Oil Corporation, Tianjin 300459, P. R. China