An iterative multilevel method for computing wavefields in frequency-domain seismic inversion

Yogi A. Erlangga, Felix J. Herrmann

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

We describe an iterative multilevel method for solving linear systems representing forward modeling and back propagation of wavefields in frequency-domain seismic inversions. The workhorse of the method is the so-called multilevel Krylov method, applied to a multigrid-preconditioned linear system, and is called multilevel Krylov-multigrid (MKMG) method. Numerical experiments are presented for 2D Marmousi synthetic model for a range of frequencies. The convergence of the method is fast, and depends only mildly on frequency. The method can be considered as the first viable alternative to LU factorization, which is practically prohibitive for 3D seismic inversions.

Original languageEnglish
Pages (from-to)1956-1960
Number of pages5
JournalSEG Technical Program Expanded Abstracts
Volume27
Issue number1
DOIs
Publication statusPublished - Jan 2008

Keywords

  • Algorithm
  • Finite difference
  • Inversion
  • Modeling
  • Wave equation

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Geophysics

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