1. School of Resources and Geosciences, China University of Mining and Technology, Xuzhou, Jiangsu 221000, People’s Republic of China
2. PetroChina Southwest Oil and Gas Field Company, Chengdu, Sichuan 610000, People’s Republic of China
3. School of Earth and Environment, University of Leeds, Leeds LS2 9JT, United Kingdom
4. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, People’s Republic of China