地面瞬变电磁法一维烟圈反演技术研究  

One-dimensional smoke ring inversion technology of ground transient electromagnetic method

作　　者：李锋平[1] 杨海燕[1] 邓居智[1] 汤洪志[1] 刘少光[1] 谢石文[1] 董萌萌[1] 

机构地区：[1]东华理工大学放射性地质与勘探技术国防重点学科实验室,南昌330013

出　　处：《地球物理学进展》2016年第2期688-694,共7页Progress in Geophysics

基　　金：国家自然科学基金项目(41564001;41164003;41264004;41304113);江西省自然科学基金项目(20151BAB203045);放射性地质与勘探技术国防重点学科实验室开放基金(RGET1308)联合资助

摘　　要：本文首先进行了瞬变电磁一维正演理论研究,推导出了回线源在均匀水平层状介质中的电磁响应计算公式,采用快速汉克尔变换和正、余弦变换的数值滤波算法以及G-S逆拉普拉斯算法计算了垂向感应电压.区别于传统一维反演一般基于晚期视电阻率,利用二分查找法和平移算法计算得到了全区视电阻率,在全区视电阻率的基础上,根据蒋邦远提出的烟圈反演方法进行了地面瞬变电磁法一维烟圈反演技术研究,最后对理论数据及实测数据进行了一维反演解释,证明了这种烟圈反演技术有助于提高实际反演解释工作的准确性.Firstly,the one-dimensional forward theory of TEM was studied,a formula was derived to calculate the electromagnetic response of loop source in uniform horizontal layered medium,the fast Hankel transform and numerical filtering algorithm of sine or cosine transform and G-S inverse Laplace algorithm were used to calculate the vertical induced voltage. Different from the traditional method of one dimension inversion which was generally based on the late time apparent resistivity, the binary search and translation algorithm were used to calculate the all-time apparent resistivity. On the basis of the apparent resistivity,a study on one-dimensional smoke ring inversion technology of ground transient electromagnetic method was conducted according to the method proposed by Jiang Bangyuan. Finally,one-dimensional smoke ring inversion for the theoretical data and the measured data were carried out,it proved that the smoke ring inversion technique helps to improve the accuracy of the actual interpretation of the inversion.

关 键 词：瞬变电磁法 一维 正演 全区视电阻率 烟圈反演 

分 类 号：P631[天文地球—地质矿产勘探]