1. Key Laboratory of Oil & Gas Exploration and Development Theory and Technology, China University of Geosciences, Wuhan, Hubei Province 430074, PR China
2. School of Earth Resources, China University of Geosciences, Wuhan 430074, PR China
3. China National Oil and Gas Exploration and Development Company Ltd., No. 6-1 North Street Fuchengmen, Xicheng District, Beijing 102100, China