1. College of Geo-Exploration Science and Technology, Jilin University, 938 Xi Minzhu Street, Changchun 130021, China.
2. Corresponding author.
3. State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum (Beijing), Beijing 102249, China.
4. CNPC Key Laboratory of Geophysical Prospecting, China University of Petroleum (Beijing), Beijing 102249, China.