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Three-dimensional Modeling of Marine Controlled-source Electromagnetic Surveys Based on Finite Difference Method

유한차분법에 기초한 인공송신원 해양전자탐사 모델링

  • Han, Nu-Ree (Department of Energy and Mineral Resources Engineering, Sejong University) ;
  • Nam, Myung-Jin (Department of Energy and Mineral Resources Engineering, Sejong University) ;
  • Ku, Bon-Jin (Department of Energy and Mineral Resources Engineering, Sejong University) ;
  • Kim, Hee-Joon (Department of Energy Resources Engineering, Pukyong National University)
  • 한누리 (세종대학교 에너지자원공학과) ;
  • 남명진 (세종대학교 에너지자원공학과) ;
  • 구본진 (세종대학교 에너지자원공학과) ;
  • 김희준 (부경대학교 에너지자원공학과)
  • Received : 2012.03.16
  • Accepted : 2012.05.14
  • Published : 2012.05.31

Abstract

This paper presents development of a three-dimensional marine controlled-source electromagnetic (mCSEM) modeling algorithm and its application to a salt and reservoir model to examine detectability of mCSEM for a reservoir under complex subsurface structures. The algorithm is based on the finite difference method, and employs the secondary field formulation for an accurate and fast calculation of modeling responses. The algorithm is verified for a two-layer model by comparing solutions not only with analytic solutions but also with those from other 3D modeling algorithm. We calculate and analyze electric and magnetic fields and their normalized responses for a salt and reservoir model due to three sources located at boundaries between a salt, a reservoir, and background. Numbers and positions of resistive anomalies are informed by normalized responses for three sources, and types of resistive anomalies can be informed when there is a priori information about a salt by seismic exploration.

Acknowledgement

Supported by : 한국연구재단

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