1. Institute of Sedimentary Geology Chengdu University of Technology Chengdu 610059 China
2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of Technology Chengdu 610059 China
3. Exploration Division of PetroChina Southwest Oil & Gasfield Company Chengdu 610041 China
4. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum University Chengdu 610500 China
5. School of Geoscience and Technology Southwest Petroleum University Chengdu 610500 China