E-E_x广域电磁法静态校正方法探讨

Discussion of Static Correction Methods for E-E_x Wide Field Electromagnetic Method

为了消除地形和地表电性不均匀体产生的静态效应,大地电磁类勘探方法通常采用相位空间滤波法、空间滤波法和小波多尺度分析法等进行静态校正。E-E_x广域电磁法是近年来以何继善为首的物探专家开发、研究出的一种新的大地电磁勘探方法,是大地电磁类勘探方法的"衍生品"。与其他电磁类勘探方法相同,E-E_x广域电磁法的观测数据也需要进行静态校正。从E-E_x广域电磁法的勘探原理入手,提出有别于其他电磁勘探方法的静态校正,并成功运用于实际生产中,取得了较好的应用效果。

In order to eliminate static correction for terrain and surface electrical heterogeneity,the method of magnetotelluric exploration usually adopts phase spatial filtering,spatial filtering and wavelet multiscale analysis to make static correction.E-Ex WFEM is a new magnetotelluric exploration method developed and researched by He Jishan.It is the“derivative”of magnetotelluric exploration.Similar to other electromagnetic exploration methods,the observation data of the E-Ex wide area electromagnetic method also need to be calibrated.Starting from the exploration principle of E-Ex WFEM,this paper puts forward a static correction which is different from other electromagnetic exploration methods,and has been successfully applied to actual production,and achieved good application results.