Finite-element analysis of controlled-source electromagnetic induction using Coulomb-gauged potentials Academic Article uri icon

abstract

  • A 3-D finiteelement solution has been used to solve controlledsource electromagnetic (EM) induction problems in heterogeneous electrically conducting media. The solution is based on a weak formulation of the governing Maxwell equations using Coulombgauged EM potentials. The resulting sparse system of linear algebraic equations is solved efficiently using the quasiminimal residual method with simple Jacobi scaling as a preconditioner. The main aspects of this work include the implementation of a 3-D cylindrical mesh generator with highquality local mesh refinement and a formulation in terms of secondary EM potentials that eliminates singularities introduced by the source. These new aspects provide quantitative inductionlog interpretation for petroleum exploration applications. Examples are given for 1-D, 2-D, and 3-D problems, and favorable comparisons are presented against other, previously published multidimensional EM induction codes. The method is general and can also be adapted for controlledsource EM modeling in mining, groundwater, and environmental geophysics in addition to fundamental studies of EM induction in heterogeneous media.

published proceedings

  • GEOPHYSICS

altmetric score

  • 3

author list (cited authors)

  • Badea, E. A., Everett, M. E., Newman, G. A., & Biro, O.

citation count

  • 140

complete list of authors

  • Badea, EA||Everett, ME||Newman, GA||Biro, O

publication date

  • January 2001