一种真复电阻率谱参数的求解方法

本文建立了地下半空间中存在二种可极化介质时,真谱与视谱间一种新的关系式,它将视谱直接以待求的真谱参数表出,而无需任何中间量的介入.在此基础上利用改进的广义逆法实现真谱的反演.文中以四种简单地电模型为例,考察了极化体形态、规模、产状、埋深、测点位置、装置类型和大小以及极化体相对围岩的电阻率不同时的反演效果.结果表明,只要初值选择合适,真谱参数的反演效果是良好的.

A NEW ALGORITHM FOR DETERMINATION OF INTRINSIC INDUCED-POLARIZATION SPECTRA OF THE EARTH

In this paper is developed a direct link of intrinsic complex resistivity (CR) spectra to apparent CR spectra. The value of this direct link lies in that it avoids any intermediate variables to be involved in the formulation which relates intrinsic CR spectra to apparent CR spectra. Thus it allows for straightforward extraction of information on intrinsic CR spectra from apparent CR spectrum data. Although the direct link is developed for an earth model consisting of only two volume-polarizable media, it won't loose its applicability in many real world cases.Based on the direct link, an inversion algorithm is completed by introducing the generalized inverse technique. The algorithm then is applied to four simple earth models to investigate how reliably the intrinsic CR spectrum parameters of the earth can be determined from apparent CR spectrum data. Various geoelectrical conditions regarding the earth models used have been considered including the shapes, sizes, occurances, and resistivities of the targets and the types and sizes of electrode arrays, etc. The results show that the extraction of intrinsic CR spectrum parameters based on the direct link generally is effective.