几种大地电磁测深资料静态位移校正方法的研究与应用

The study and application of static displacement correction for magnetotelluric sounding data processing

由浅部不均匀电性体所引起的静态位移效应,是大地电磁测深(MT)数据处理工作中必须重点考虑的问题。这里阐述了静态位移效应对MT测深资料的影响,结合两组理论模型的研究,通过分析空间滤波法、曲线平移法、阻抗相位校正法等一些常用MT静态位移校正处理方法,得出了一些有用结论,为野外实测MT数据的校正处理工作提供了参考资料。最后将这些方法应用于某工区实测MT数据的处理中,并结合二维地电模型,说明了MT数据校正处理在开展MT工作中的重要地位。

Shallow uneven electric bodies are major considerations in MT data processing problems.In this paper,static displacement was elaborated on MT sounding data.Two models are used in this study.Some useful conclusions are drawn through the research of two theoretical models to analysis the methods of spatial filtering,vertical shift of MT curves and im-pedance phase correction about data processing.These methods are used to guide the measured MT data processing.In the last,these data processing methods are being used to process the measured MT data in an area.Combined with two-dimen-sional geoelectric model illustrates the importance of data processing.