物探与化探2017，Vol.41Issue(1)：136-140,5.DOI:10.11720/wtyht.2017.1.21
起伏地形条件下电阻率法三维反演
A discussion on 3D inversion result of the resistivity method under the condition of undulate topography
韩雪 1朱伟国1
作者信息
- 1. 广东省地质物探工程勘察院,广东广州510800
- 折叠
摘要
Abstract
3D resistivity inversion under the condition of undulate topography is a difficult problem in the current resistivity method.In order to solve this problem,the authors use a weighted regularized conjugate gradient method to accomplish three-dimensional resistivity inversion algorithm of undulating terrain.The method introduces weighted regularization thought which can significantly reduce the problem of the objective function iteration divergence and improve the stability of the inversion.A comparison of the two methods in eliminating topographic influence in the inversion shows that the direct use of the terrain resistivity method of 3D inversion can yield better resolution,which can effectively eliminate the error caused by terrain.Nevertheless,under the condition that the rolling angle is almost vertical such as the cases of rivers and dams.The continual utilization of this method can hardly get a satisfactory result because it causes the inverse divergence.In such cases,the use of topographic correction method has some advantageous effects.关键词
电阻率法/三维反演/加权正则化共轭梯度法/起伏地形Key words
resistivity method/3D inversion/weighted regularized conjugate gradient method/undulate topography分类
天文与地球科学引用本文复制引用
韩雪,朱伟国..起伏地形条件下电阻率法三维反演[J].物探与化探,2017,41(1):136-140,5.
