Hongfei Lai (State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum (Beijing), Beijing, China), Meijun Li (State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum (Beijing), Beijing, China), Jiguo Liu (Research Institude of Petroleum Exploration & Development, PetroChina, Beijing, China), Fengjun Mao (Research Institude of Petroleum Exploration & Development, PetroChina, Beijing, China), Hong Xiao (State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum (Beijing), Beijing, China), Jiang Kuang (State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum (Beijing), Beijing, China)