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在实际大地电磁测深数据反演过程中,为了得到更加清晰的电性单元分界面,传统的Occam平滑反演方法遇到了挑战,本文讨论了sharp boundary inversion(SBI)反演的理论及其应用.通过模型试算,对比Occam和SBI的反演效果,证明了SBI反演划分层状介质的可靠性.本文对临江市六道沟地区实测可控源音频大地电磁测深(CSAMT)数据进行了全区视电阻率转换,然后对全区视电阻率进行Occam反演和SBI反演.最后对比已有地质资料,表明SBI反演能够用于CSAMT数据的处理中.
In order to obtain a clearer interface of the electric unit, the traditional Occam smooth inversion method has encountered some challenges during the inversion of real MT data. This paper discusses the theory of sharp boundary inversion (SBI) inversion and its application Through the model trial calculation, the inversion results of Occam and SBI are contrasted, and the reliability of SBI inversion and delamination layered media is proved.In this paper, the CSAMT data of controlled source audiometry in Liudaogou area of Linjiang The region’s apparent resistivity conversion, and then Occam inversion and SBI inversion of apparent resistivity in the whole area.At last, the existing geological data are compared to show that the SBI inversion can be used in the processing of CSAMT data.