1. School of Economics, Sichuan University of Science and Engineering, Yibin 644000, China
2. National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
3. School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China
4. Faculty of Geography and Geology, Institute of Geological Sciences, Jagiellonian University, Gronostajowa 3a, Kraków 30-387, Poland
5. Sinopec Exploration Company, Chengdu 610041, China