Author(s)

E.H. Liu, Y. Lamontagne and E. Sidaway

Abstract

Until now the boundary element method has not been applied extensively to geophysical electromagnetic modeling, where one often has to handle a target with high but finite conductivity in a weakly conductive host. The traditional surface current formulation can become numerically unstable for those cases. In this paper we develop the formulation of the integral equa- tions pertaining to the Multiscalar Boundary Element Method (MBEM) for problems with a composite target made of two unconnected bodies of dis- tinct conductivities. The corresponding numerical results shown here aptly describe the main components of a typical geophysical electromagnetic re- sponse: the "current gathering" effect and the eddy current induction effect. 1 Introduction In this paper

Keywords