电磁导数场概率成像方法研究  

Probability tomography of electromagnetic field-derivative method

作　　者：王绪本[1] 毛立峰[2] 高永才[2] 

机构地区：[1]成都理工大学"油气藏地质及开发工程"国家重点实验室,成都610059 [2]成都理工大学"地球探测与信息技术"教育部重点实验室

出　　处：《成都理工大学学报（自然科学版）》2004年第6期679-684,共6页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：国家自然科学基金资助项目(40074036)

摘　　要：电磁导数场概率成像方法是一种侧重于识别地质异常体的成像反演方法。它基于归一化的电磁场的偏导数更能突出异常场分布特性,将电磁场概率成像的发生概率函数改为实测电磁场场值函数与相应的扫描函数各自的导数函数经归一化后的互相关函数。用新方法对几个理论模型进行成像,成像结果显示:改进的概率成像方法使得高概率更加集中于异常体区域,并且不再需要计算背景场,使概率成像方法对复杂地质体成像成为可能。The probability tomography of electromagnetic field-derivative method is an imaging inversion method that emphasizes particularly on singling out the anomaly. Based on the characteristic that the abnormal field can be standed out against the background field in virtue of the normalized electromagnetic field-derivative, the method amends the occurrence probability function into the crosscorrelation of the normalized observed EM field-derivative component and the derivative of corresponding normalized scanning function. The new method is tested on several synthetic models and it can be drawn from the result of the tomography that the localization of high probability of the amendatory method is more concentrated inside the anomaly. Besides, it no longer need calculate the primary field. This makes it possible that the probability tomography method can be feasibly applied to arbitrary geologic bodies.

关 键 词：大地电磁 导数场概率成像 发生概率函数 

分 类 号：P631.2[天文地球—地质矿产勘探] P631.3[天文地球—地质学]