MT数据处理中静校正方法对比  

COMPARISON OF DIFFERENT STATIC CORRECTION METHODS IN MT DATA PROCESSING

作　　者：杨淼鑫[1] 李晓晨[1] 刘小畔[1] 

机构地区：[1]成都理工大学地球物理学院,成都610059

出　　处：《物探化探计算技术》2012年第3期310-313,240,共4页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家863课题(2009AA06Z108)

摘　　要：在大地电磁测深数据处理中,静态效应会影响解释结果。这里主要采用有限单元法进行正演计算,采用阻抗相位校正法、空间滤波法以及视电阻率导数解释法,对存在静态效应的理论模型进行数据处理。对比结果表明,前二种方法对静态效应起到了一定的压制和改善作用,且阻抗相位校正法效果相对较好,而通过视电阻率导数解释法,可以准确地反映地下真实异常形态。In magnetotelluric sounding data processing,the static shift will affect the result of interpretation.In this paper,we use finite element method for forward calculation,use impedance phase correction method,spatial filtering method and apparent resistivity derivative explanation method,and do data processing on the theoretical model which exists the static shift.The result shows the first two methods play a certain amount of repression and improvement on the static shift,impedance phase correction method is relatively good,by using apparent resistivity derivative explanation method can accurately reflect the true abnormal morphology underground.

关 键 词：大地电磁测深法 静态效应 阻抗相位校正法 空间滤波法 视电阻率导数解释法 

分 类 号：P631.325[天文地球—地质矿产勘探]