financially supported by the National Natural Science Foundation(Grant No.41502111,Grant No.91755215 and Grant No.U1262206);the Unconventional Oil and Gas Geology Key Laboratory of China Geological Survey(DD20160170)。
The Lower Silurian Longmaxi Formation in the south of Sichuan is a key player in the exploration and development of shale gas in China.Due to a highly complex topographic area,electromagnetic methods(EM)become importa...