基于二维小波分解的MT二维反演方法  

2D WAVELET DECOMPOSITION BASED TWO-DIMENSIONAL MAGNETOTELLURIC INVERSION

作　　者：刘苗[1,2] 吴健生[1] 于鹏[1] 张罗磊[1] 

机构地区：[1]同济大学海洋地质教育部重点实验室,上海200092 [2]中国石化集团上海海洋石油局,上海200092

出　　处：《物探与化探》2009年第3期337-341,共5页Geophysical and Geochemical Exploration

基　　金：国家自然科学基金项目(40674063);863课题(2006AA09Z311)资助

摘　　要：对于大地电磁反演,期望得到快速稳定的反演结果并且能够反映清晰的、未发生畸变的地质界面。为了解决这一问题,提出了基于二维小波分解的MT二维反演技术,对小波分解得到的背景场采用光滑反演,细节部分采用聚焦反演。通过模型试验,证明了该方法的有效性,同时对某区的实际资料进行了处理,表明了该方法的适用性和效果。In MT inversion, we all hope to get rapid and stable results with relatively clear geological interfaces suffering no distortion. In this paper, a fast and stable method of 2D MT inversion has been developed by integrating the smoothest inversion for regional field and focusing inversion for local anomaly. This method uses wavelet to decompose 2D MT data into different frequency components and reconstruct them into the approximate component （regional field） and details （local anomaly）. The experimental results show that the method is effective. The authors applied it to the field data and yielded expected effect.

关 键 词：大地电磁测深 二维小波分解 分频反演 

分 类 号：P631[天文地球—地质矿产勘探]