WIT Press


Application Of A New Boundary Element Method To Geophysical Electromagnetic Modeling

Price

Free (open access)

Paper DOI

10.2495/BE970451

Volume

19

Pages

11

Published

1997

Size

845 kb

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