低电阻率差情况下三维激电法快速数值模拟  

FAST NUMERICAL SIMULATION OF 3-D INDUCED POLARIZATION FOR LOW RESISTIVITY CONTRASTS

作　　者：刘小军[1] 王家林[1] 

机构地区：[1]同济大学海洋地质国家重点实验室,上海200092

出　　处：《物探化探计算技术》2006年第3期194-196,共3页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：中科院知识创新工程项目资助(KZCX1-SW-18-01)

摘　　要：将一种快速数值模拟方法用于激电法正演模拟中,利用在低电阻率差情况下,积分方程法模拟时阻抗矩阵的非对角线项可忽略,而只需计算矩阵主对角值这一关键点。这里详细阐明了三维地电断面激电法快速模拟方法,推导了求解过程,并以此为基础编制了计算程序。实例试算结果说明,该模拟方法在计算速度、计算精度上都收到了较满意的结果。In this paper,a method of fast numerical simulation is presented in 3-D induced polarization.Based on the fact of neglecting off-diagonal terms in Green's dyadic elements of the matrix,we compute only the diagonal elements of the matrix when the resistivity contrasts in adjacent cell is low.The fast method is expounded and the calculative flow is deduced.The simulated result of synthetic model indicates that the new method is accurate and fast.

关 键 词：三维 激电法 格林函数 数值模拟 

分 类 号：P631.322[天文地球—地质矿产勘探]