基于隔离系数-比值校正高密度电法浅部不均匀体效应的方法

Method for Correcting the Inhomogeneous Body Effect of Shallow Part by High-density Resistivity Method Based on Isolation Coefficient-Ratio

文章针对高密度电法勘察中浅部不均匀体效应提出基于隔离系数-比值校正以提高深部目标体的分辨能力的方法。通过隔离系数与地质体深度之间存在的对应关系,选取主要反映浅部信息的较小n值情况的视电阻率数据,反演获得浅部不均匀体展布规模信息;然后根据"比值法"原理对原始视电阻率数据进行校正;最后将经校正后的视电阻率数据进行反演解释,得到的结果更凸显深部目标体信息,从而提高了对深部目标体的分辨能力。

This article proposed a method based on the isolation coefficient-ratio correction to improve the resolving power of deep target body regarding the inhomogeneous body effect of shallow part in high density resistivity method survey. Through the corresponding relationship between the isolation coefficient and the depth of geological body,it selected the apparent resistivity data mainly reflecting the smaller n value situation of shallow part information,which was then inverted to obtain the distribution scale information of shallow-part inhomogeneous body; then,according to the principle of＂ratio method＂,it corrected the original apparent resistivity data; in the end,the corrected apparent resistiv-ity data went through the inversion and interpretation,and the obtained results highlighted the information of deep target body,thereby improving the resolving capability of deep target body.