摘要
主动源时间域电磁测深方法的主要优势在于其稳定的电磁响应信号和优越的勘探深度,特别是其对低阻薄层的敏感反映.但传统的视电阻率计算方法是采用极端情况进行定义的,因而对极端条件的合适度与电磁响应结果的数据处理和解释如何保持一致是一个很难确定的前提.本文建议采用一种直接利用观测结果进行2阶数值微分的方法来求解对应地点断面的视电阻率.这种方法计算所得视电阻率能很好的与地点断面的真实电阻率对应.这就为时间域电磁测深结果的直接解释或为反演初始模型参数选择提供了良好的基础.
For the advantage of Stable signal and large detective depth of the Time Domain Electromagnetic Sounding,it is widely used currently for Mineral and Geological Structure Exploration.But in general,it is supposed some extremely conditions for processing and explaining the observed results.And it is very difficultly to fit that conditions we supposed.So we cannot get the exact processing and explaining of the observed results.We suggested a method by using Numerical Differential Calculating to obtain the apparent resistivity of TEM sounding in this paper.It can get the results close to the real Geo-Electrical section.We can simplify the explanations of the observed results.And we can get the Model Parameters for the inverse calculating easily.
出处
《地球物理学进展》
CSCD
北大核心
2012年第6期2548-2553,共6页
Progress in Geophysics
基金
矿产资源与灾害探查湖南省高校科技创新团队(2008-244)
博士点基金:20070533102
湖南重大专项基金:2008FJ1006
有色资源与灾害探查湖南湖南省重点实验室(2004-32)联合资助
关键词
时间域电磁测深法
数值计算
数值微分
视电阻率
K模型
TEM sounding
numerical calculating
numerical differential
apparent resistivity
K model
