1. School of Earth Sciences and Engineering, Xi’an Shiyou University, Xi’an 710065, China
2. Shaanxi Key Laboratory of Petroleum Accumulation Geology, Xi’an Shiyou University, Xi’an 710065, China
3. Key Laboratory of Petroleum Resources Research, Lanzhou 730000, China
4. Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
5. Shanghai Branch of CNOOC Ltd., Shanghai 200030, China