大地电磁测深数据处理技术与反演方法改进及其应用实例  

The application examples and improvement for data processing technology and inversion methods of the magnetotelluric sounding

作　　者：李晓昌[1] 钟清[1] 方慧[1] 张小博[1] 裴发根[1] 

机构地区：[1]中国地质科学院地球物理地球化学勘查研究所,廊坊065000

出　　处：《物探化探计算技术》2017年第3期313-318,共6页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：中国地质调查局地质调查项目(1212011120971)

摘　　要：介绍了大地电磁测深法在"松辽外围中新生代盆地群油气地质远景调查"中,其数据处理与反演的基本方法与运用原则,提出了"浅部选择Occam反演,深部选用NLCG反演"和"交叉测线剖面阻抗旋转处理"及"多折线剖面等距离Li旋转算法处理"的改进方法技术组合,从整体上提高了MT资料处理与反演成果的质量。应用实例的反演结果真实有效,为后期的综合解释提供了可靠性资料。In this paper,the data processing technology and the inversion methods of the magnetotelluric sounding are intro-duced in the program,that called oil and gas geological survey prospect in Mesozoic and Cenozoic basin groups of the peripheral of Songliao basin. Combination of technologies that are ID and 2D Occam inversion methods are selected in the shallow strata and the NLCG inversion method is applied in deep strata that have been proposed. The new methods that are the technology of cross survey -lines impedance rotation processing and the technology of Li equidistant rotation algorithm in polyline sections have been used. The quality of inversion results is improved by the application of these technologies. The examples of inversion results are real and effective. This method provides reliable information for the comprehensive explanation.

关 键 词：MT Occam二维反演 非线性共轭梯度反演 等距离Li旋转算法 突泉盆地 

分 类 号：P631.2[天文地球—地质矿产勘探]