一维时域磁场与频域电场联合反演方法研究  

Study on joint inversion method of one-dimensional time-domain magnetic field and frequency-domain electric field

作　　者：柳建新[1] 汤文武[1,2] 何展翔 刘颖[1] 童孝忠[1] 

机构地区：[1]中南大学,长沙410083 [2]东方地球物理公司,涿州072751

出　　处：《地球物理学进展》2011年第6期2011-2017,共7页Progress in Geophysics

基　　金：国家科技重大专项专题项目(2008ZX05019-007);国家自然科学基金项目(41174403);教育部博士点基金项目(20110162120064)联合资助

摘　　要：多方法、多参数的联合是地球物理反演的一个重要的发展方向.本文中,在水平电偶极发射下,频率域利用快速汉克尔变换法计算一维水平层状大地的水平电场响应,时间域利用G-S变换计算垂直磁场对时间的导数值.设计了四个简单模型进行对比,正演计算表明时域磁场对低阻体反映极为灵敏,对高阻体反映不灵敏;而频域电场对低阻体及高阻体反映都比较灵敏.在一维正演基础上建立了基于广义逆的时频联合反演方法,理论模型反演结果表明时频联合反演效果较单一反演方法好.Joint of multi-method, multi-parameter is an important development direction of geophysical inversion. In this paper, on condition of emission hy the horizontal electric dipole, in the frequency-domain fast Hankel transform is used to calculate level electric field response of one-dimensional horizontal layered earth, in the time domain G-S transform is used to calculate the derivative of the vertical magnetic field by time . Designing a comparison of four simple models, forward calculations show that time-domain magnetic field is extremely sensitive to the conductive body and insensitive to the high resistance body; while frequency-domain electric field is sensitive to the conductive and high resistance body. In the basis of one-dimensional forward, time-frequency joint inversion method is established based on generalized inverse, theoretical model inversion results show that the joint of timefrequency inversion method is better than a single inversion.

关 键 词：时频联合 广义逆 汉克尔变换 G-S变换 联合反演 

分 类 号：P631[天文地球—地质矿产勘探]