[1
]School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500,
People’s Republic of China
[2
]State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest
Petroleum University, Chengdu 610500, People’s Republic of China
[3
]Shale Gas Institute of PetroChina Southwest Oil & Gasfield Company, Chengdu 610051,
People’s Republic of China