Fast numerical methods for marine controlled-source electromagnetic (EM) survey data based on multigrid quasi-linear approximation and iterative em migration

Takumi Ueda, Michael S. Zhdanov

Research output: Contribution to journalArticle

7 Citations (Scopus)


In this paper we consider an application of the method of electromagnetic (EM) migration to the interpretation of a typical marine controlled-source (MCSEM) survey consisting of a set of sea-bottom receivers and a moving electrical bipole transmitter. Three-dimensional interpretation of MCSEM data is a very challenging problem because of the enormous number of computations required in the case of the multi-transmitter and multi-receiver data acquisition systems used in these surveys. At the same time, we demonstrate that the MCSEM surveys with their dense system of transmitters and receivers are extremely well suited for application of the migration method. In order to speed up the computation of the migration field, we apply a fast form of integral equation (IE) solution based on the multigrid quasi-linear (MGQL) approximation which we have developed. The principles of migration imaging formulated in this paper are tested on a typical model of a sea-bottom petroleum reservoir.

Original languageEnglish
Pages (from-to)60-67
Number of pages8
JournalExploration Geophysics
Issue number1
Publication statusPublished - 2008 Oct 1



  • Electromagnetic method
  • Electromagnetic migration
  • Integral equation
  • Inverse problem.
  • Marine CSEM
  • Numerical method
  • Quasi-linear approximation

ASJC Scopus subject areas

  • Geophysics
  • Geology

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