非均匀介质电磁参数成像理论方法  

ELECTROMAGNETIC PARAMETER IMAGING

作　　者：曹俊兴[1] 贺振华[1] 严洪瑞[2] 

机构地区：[1]成都理工学院"油气藏地质及开发工程"国家重点实验室,成都610059 [2]大庆石油管理局物探公司

出　　处：《成都理工学院学报》1999年第4期321-328,共8页Journal of Chengdu University of Technology

基　　金：国家自然科学基金;四川省学术技术后备带头人培养基金

摘　　要：讨论了非均匀良导介质的电磁参数成像理论及方法，给出了频域磁场数据的线性与非线性迭代反演算法公式，讨论了基于架构式域分解的整体积分局部微分并行域分解正反演算法的原理和实现，提出了比散射响应概念和针对比散射响应数据的反演方法。新提出的方法能有效解决近—远场成像问题，并且在ＢｏｒｎThis paper discusses EM parameter imaging methods of inhomogeneous earth medium. It gives the idea and key formulae for linear inversion imaging, non linear iterative inversion imaging and GILD (Global Integral and Local Differential parallel decomposition) inversion imaging using magnetic field data. This paper presents a new concept “ratio scattering” and a new inversion strategy named “ratio scattering imaging” which does inversion using frequency domain ratio scattering data. The inversion algorithm may be a suitable means to deal with the near far field image problem and will be a very simple form under Born approximation. The inversion formula is now for electric field data, however, it can be easily to extend to magnetic field data and seismic data case.

关 键 词：电磁成像 比散射 非线性反演 域分解 电磁法 

分 类 号：P631.325[天文地球—地质矿产勘探]