水平层状介质电磁法数据时频联合反演  

TIME-FREQUENCY JOINT INVERSION IN ELECTROMAGNETIC METHOD OF HORIZONTAL LAYERED MEDIUM

作　　者：戴亦军[1] 汤文武[1] 曹创华[1] 

机构地区：[1]中南大学地球科学与信息物理学院,长沙410083

出　　处：《物探化探计算技术》2013年第1期18-22,3-4,共5页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：教育部博士点新教师专项科研基金项目(20110162120064);中南大学青年教师助推题课(2011QNZT010)

摘　　要：通过一维层状介质电磁法数据的时域和频域正演结果,对不同电阻率大小的电阻层进行了反演计算,说明了在这种情况下电磁法数据时频联合反演的合理性。正演计算了一维层状模型下水平电偶极频率域水平电场响应及利用G-S变换计算时间域垂直磁场导数响应;利用最光滑模型约束反演方法建立了时频联合反演迭代公式。通过理论模型反演试算表明,该反演效果较好。Based on the results of one-dimensional layered media forward modeling in time domain and the frequency domain of electromagnetic data,the inversion was carried out and the results indicated that the joint inversion of time-frequency was reasonable.It is carried out that forward calculation of horizontal electric field response of horizontal electric dipole in the one-dimensional layered model in frequency domain and the use of the G-S transforms calculation of the vertical magnetic field derivative of the time domain response,and that a time-frequency inversion iteration formula of smoothest model constrained inversion method is established.The theoretical model inversion re sult shows that the effect of inversion is good.

关 键 词：水平电偶极 G—S变换 最光滑模型 时频联合 

分 类 号：P631.322[天文地球—地质矿产勘探]