Numerical Modeling for Transient Anomalous Secondary Electromagnetic of Tabular Orebody in Borehole
Yang Huaijie
Pan Heping
Luo Miao
Meng Qingxin
Abstract：The transient electromagnetic response of conductive orebody is studied so as to provide a reliable basis for the explo-ration of the transient electromagnetic in borehole.Finite-different time-domain method and Mur absorbing boundary were used to simulate three-dimensional transient electromagnetic field generated by magnetic dipole source,and establishing the geomet-ric model of low resistivity orebody with different depth,different sizes,different dips,as well as high resistivity orebody in the whole space.During the data processing,excluding the impact of conductive whole space to the total response and getting the anomalous secondary field which reflects the target characteristics.The regularity of the geometric model was analyzed,and the result shows that the orebody with different depth,sizes,dips and conductivity have very different response.The method for identification of tabular orbody has a significant effect.
Keywords：transient electromagnetic methodfinite-difference methodtabular orebodyMur absorbing boundarygalvaniccurrent
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：12( 1689-1700 )