Electromagnetic Fields due to Electric Dipoles in Stratified Media

Abstract

The electromagnetic fields excited by horizontal and vertical electric dipoles in stratified media are derived using vector potentials which have been studied in past decades. However, unfortunately, it is difficult to find papers and/or textbooks which describe the derivation of the electromagnetic fields in detail. The main objectives of this paper are to uniquely derive the electromagnetic fields due to electric dipoles in stratified media in detail, and to develop and to demonstrate the computation code which has flexibility. The transmitter dipole and receiver can be located arbitrary in stratified media with anisotropic and/or complex resistivity in the developed technology. The results of synthetic studies show that the developed code can compute accurate and reliable electromagnetic fields. The developed technology can be applied not only for the 1D electromagnetic forward and inverse modeling, but also for the background field and Green's tensor computations which are required for the 3D electromagnetic forward and inverse modeling based on the integral equation method. Further, the technique may be used for the primary field computation required for the 3D electromagnetic forward and inverse modeling based on the differential equation methods with secondary field formulation.