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Applied Geophysics

, Volume 13, Issue 1, pp 25–36 | Cite as

Singularity-free Green’s function for EM sources embedded in a stratified medium

  • Ai-Hua Weng
  • Yun-He Liu
  • Chang-Chun Yin
  • Ding-Yu Jia
Article

Abstract

We present a method to unify the calculation of Green’s functions for an electromagnetic (EM) transmitting source embedded in a homogeneous stratified medium. A virtual interface parallel to layer interfaces is introduced through the source location. The potentials for Green’s function are derived by decomposing the partial wave solutions to Helmholtz’s equations into upward and downward within boundaries. The amplitudes of the potentials in each stratum are obtained recursively from the initial amplitudes at the source level. The initial amplitudes are derived by coupling with the transmitting sources and following the discontinuity of the tangential electric and magnetic fields at the source interface. Only the initial terms are related to the transmitting sources and thus need to be modified for different transmitters, whereas the kernel connected with the stratified media stays unchanged. Hence, the present method can be easily applied to EM transmitting sources with little modification. The application of the proposed method to the marine controlled-source electromagnetic method (MCSEM) demonstrates its simplicity and flexibility.

Keywords

EM Marine EM Green’s function stratified medium singularity 

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Copyright information

© Editorial Office of Applied Geophysics and Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Ai-Hua Weng
    • 1
  • Yun-He Liu
    • 1
  • Chang-Chun Yin
    • 1
  • Ding-Yu Jia
    • 2
  1. 1.College of Geoexploration Science and TechnologyJilin UniversityChangchunChina
  2. 2.Institute of Geophysical and Geochemical ExplorationCAGSLangfangChina

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