大地电磁阻抗张量旋转方法和曲线圆滑方法的比较  

A COMPARATIVE STUDY OF MAGNETOTELLURIC IMPEDANCE TENSOR ROTATION AND CURVE SMOOTHING METHODS

作　　者：赵维俊[1] 孙中任[1] 

机构地区：[1]沈阳地质矿产研究所,辽宁沈阳110034

出　　处：《物探与化探》2013年第6期1125-1132,共8页Geophysical and Geochemical Exploration

基　　金：中国地质调查局项目(编号:1212011220242)

摘　　要：随着三维深部地质填图和含页岩气盆地潜力的评价项目展开,大地电磁方法的重要性越来越突显。大地电磁资料处理和解释中,至今还存在几个挑战性难题,例如阻抗张量旋转、TE和TM模式识别、静态矫正、TE和TM模式选择二维反演问题。从WinGlink软件大地电磁模块出发,使用5种阻抗旋转方法和3种数据圆滑方法处理在内蒙古扎鲁特旗采集的大地电磁数据。以数据质量不同的3个测点的处理结果为依据,对各种旋转方法和圆滑方法进行详细评价,数据极化图显示地下结构模型是复杂的三维结构。对这些方法的比较研究,对三维结构下大地电磁数据处理,特别是对使用WinGlink软件处理大地电磁数据具有重要现实意义。In recent years,with the implementation of three-dimensional deep geological mapping and shale gas bearing basin prospective evaluation,magnetotelluric method,as one of geophysical methods,has become more and more important. There are a finite number of challenging problems in magnetotelluric data processing and interpretation such as impedance tensor rotation,TE and TM mode identification,static distortion correction,and selection of TE and TM for 2D inversion. Based on magnetotelluric module in WinGlink software,the authors adopted five impedance tensor rotation methods and three curve smoothing methods to process the magnetotelluric data gathered in Jarud Banner,Inner Mongolia. Three stations with different qualities in one profile were chosen to process. The results of five rotation methods and three smoothing methods were analyzed and assessed. Polar diagram analysis of three stations showed that the geological models under themselves were three-dimensional. The comparative study is critical for three-dimensional geological models,and is especially much instructive to the processing and interpretation of magnetotelluric data by using WingGlink software.

关 键 词：大地电磁 阻抗张量旋转 曲线圆滑 WinGlink软件 

分 类 号：P631.325[天文地球—地质矿产勘探]