高密度电法中多尺度反演提高深部异常的分辨能力研究  

A Study on the Improvement of Resolution for Deep Object Identification in Inversion of Multi-electrode Resistivity Survey

作　　者：杨庭伟 黄俊革[2] 徐荣华[3] 覃航 

机构地区：[1]广西交通科学研究院,广西南宁530007 [2]上海应用技术学院城市建设与安全工程学院,上海200234 [3]江西省地质调查研究院,江西南昌330030

出　　处：《工程地球物理学报》2013年第3期369-373,共5页Chinese Journal of Engineering Geophysics

基　　金：中国地质调查局地质调查项目(编号:1212011120196)资助

摘　　要：针对高密度电阻率法反演中关于提高深部目标体分辨能力问题进行了探讨。首先对实测视电阻率数据进行第一尺度反演,其次将第一尺度反演的结果进行正演,并将得到的视电阻率值采用"比值法"对实测视电阻率数据进行校正,将校正后的视电阻率数据进行第二尺度的反演,得到基本不包含浅部信息二次反演的地电断面,最后采用二次反演得到的地电断面构造"比值参数"对第一尺度反演的结果进行修正,得到反映全区域地电信息的反演断面。通过模型计算表明,该方法能有效提高深部异常的分辨能力。The problem on improvement of resolution for deep object identification in inversion of multi-electrode resistivity survey is discussed in the paper.Firstly,the first inversion is applied to the inversion of field apparent resistivity.And then,for removing the effects from shallow targets,ratio method was used to filter the field data with forward data acquisition from the first inversion section.Secondly,the second inversion was carried out.So the inversion section without effects from shallow targets can be obtained from the inversion of filtered apparent resistivity data.Furthermore,we also put forward a new concept of ratio parameter which was applied to improve the resolution of deep object identification in the inversion.Finally,the first inversion section is corrected by ratio parameter.The calculated results show that the resolution for deep targets in inversion of multi-electrode resistivity survey can be improved effectively by this method.

关 键 词：高密度电法 电阻率反演 比值参数 多尺度反演 深部异常 

分 类 号：P631[天文地球—地质矿产勘探]