1. School of Communication Engineering; Chengdu University of Information Technology; Chengdu 610225 China
2. SINOPEC Key Laboratory of Geophysics; Nanjing 211103 China
3. The State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation; Chengdu University of Technology; Chengdu 610059 China
4. School of Geoscience and Technology; Southwest Petroleum University; Chengdu 6105002 China
5. School of Mathematical Sciences; University of Electronic Science and Technology of China; Chengdu Sichuan 611731 China
6. Geomathematics Key Laboratory of Sichuan Province; Chengdu University of Technology; Chengdu 610059 China