时间谱电阻率法中的剩余电磁效应研究

STUDY ON THE RESIDUAL ELECTROMAGNETIC EFFECT IN TIME SPECTRAL RESISTIVITY METHOD

根据频谱激电(SIP)法或复电阻率(CR)法中研究剩余电磁(REM)效应的思想,通过分析时间谱电阻率(TSR)法中场的基本特征,在TSR法中建立了与SIP(或CR)法中参数φmax φ0max相类似的参数———Emax E0,用来描述TSR法中的REM效应。通过对一维可极化大地模型的REM效应的理论计算,验证了用Emax E0表示的REM异常可用来形象地反映地电断面电阻率的高低。

In accordance with the idea of residual electromagnetic (REM) effect in spectral induced polarization(SIP) or complex resistivity(CR) method, a new parameter Emax /E0, which is similar to the parameter φmax /φ0 maxin SIP (or CR) method, is made out to describe REM effect in time spectral resistivity method based on analyzing the principle characteristic of the field .Computed results in one-dimensional polarizable earth model show that the parameter Emax /E0 is capable of reflecting the distribution property of the sub-surface electrical section.