1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China
2. National Key Laboratory of Oil & Gas Reservoir Geology and ExploitationSouthwest Petroleum University, Chengdu 610500, China
3. Research Institute of Shale gas, PetroChina Southwest Oil & Gasfield Company, Chengdu 610500, China
4. Research Institute of Exploration and Development, PetroChina, Beijing 100083, China
5. National Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao, Shandong 266000, China
6. PetroChina Southwest Oil and Gas Field Company, Chengdu 610051, China