New technology and effects of mountainous MT data processing
Zhang Xiang, Yan Liang-jun, Su Zhu-liu, Hu Wen-bao
Key Lab of Education Ministry for Hydrocarbon Resource and Exploration Technology, College of Geophysics, Yangtze University, Jinzhou City, Hubei Province, 434023, China
Abstract：The MT data in mountainous area inevitably suffered from the various interferences and influence of topography and local anomalous bodies. In view of this issue, the paper presented new mountainous MT data processing and interpretation approaches: ①using regression algorithm based on supporting vector computer for denoise, which plays some role in diminishing the influence of topography at a part of survey points and local anomalous bodies; ②using 1-D non-linear inversion that approaches global optimum by MT second-order function to construct initial geoelectric model of 2-D inversion; ③using 2-D mountainous inversion technique to carry out 2-D TE and TM combination inversion for 2-D geoelectric model based on practical topographic structure. It is shown by processing results of surveyed data that geoelectric sections yielded from the approach presented by the paper were characterized by not only identified stratigraphic division, but also good correlation among separate strata, in contrast, the regularity of geoelectric sections processed by former ordinary approach was poorer.
张翔, 严良俊, 苏朱刘, 胡文宝. 山区MT资料处理新技术及效果[J]. 石油地球物理勘探, 2007, 42(4): 454-456,473.
Zhang Xiang, Yan Liang-jun, Su Zhu-liu, Hu Wen-bao. New technology and effects of mountainous MT data processing. OGP, 2007, 42(4): 454-456,473.
