1. Northwest Institute of Eco‐Environment and Resources Chinese Academy of Sciences Lanzhou 730000 China
2. Key Laboratory of Petroleum Resources Research, Gansu Province Lanzhou 730000 China
3. University of Chinese Academy of Sciences Beijing 100049 China
4. Inner Mongolia University of Science and Technology Baotou Inner Mongolia 014000 China
5. CNOOC Research Institute Co., Ltd. Beijing 100028 China