矩形大定源瞬变测深数据模型约束反演  

INVERSION OF TEM DATA FROM RECTANGULAR LOOP ON A LAYERED EARTH MODEL

作　　者：翁爱华[1] 高玲玲[1] 刘云鹤[1] 

机构地区：[1]吉林大学应用地球物理系,长春130026

出　　处：《物探化探计算技术》2008年第4期314-316,共3页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家高技术研究发展计划(863项目)(2006AA06Z109)

摘　　要：利用一维光滑模型约束反演对矩形大定源回线的数据进行反演,大定源回线瞬变电磁响应采用计算速度很快的小方形回线等效叠加方法获得。光滑模型反演分别采用基于平坦约束和光滑约束进行,通过对层状模型理论的垂直磁场感应电动势数据和实际数据进行反演,结果表明,采用光滑模型约束,能较稳定地获得地下电阻率的合理分布。The paper presents the inversion of transient electromagnetic (TEM) sounding data of rectangular loop over layered conductive earths by a model constraint method. The TEM response of rectangular loop is estimated by partitioning large loop into much smaller square loops and integrating the response of each square loop. Inversion is adapted from Occams inversion with both type constraints of the flattest model and the smoothest model. The inversion method is applied to a synthetic layered earth model and field data, and the results show that the model constraint inversion is feasible to rectangular data, and the inversed model is irrelevant with loop shape.

关 键 词：矩形大定源回线 瞬变电磁测深 一维模型 约束反演 

分 类 号：P631.325[天文地球—地质矿产勘探]