基于时域激电的层状大地视谱参数测深曲线反演

Apparent IP Parametric Curves over Multi-layered Earth Inversed by TDIP Data

基于时间域Cole-Cole模型及视充电率的观测方式,推导出层状大地时域激电测深正演计算方法,运用最小二乘法对电测深曲线进行反演,得出视相关系数cs、视充电率ms、视时间常数τs等视谱参数测深曲线。对几种层状介质模型视谱测深曲线反演计算表明,基于时域激电数据计算得到的视谱参数测深曲线能够反映出各地层频谱参数特征,可以为时域激电测深提供更为丰富的信息,为激电异常及极化体性质评价和分类提供有利的参考。

A forward modeling method of TDIP sounding over layered earth was derived based on time domain Cole--Cole model and the way of apparent chargeability was ob- served. And then sounding curves of the apparent correlation coefficient （cs）, apparent chargeability （ms）, and apparent time constant（τs） were calculated from TDIP data by least square method. By analyzing several models, it showed that the apparent intrinsic IP pa- rameters sounding curves could characterize the real polarizable earth models, provide more information than traditional interpretation way and benefit IP abnormality classification.