Compressive simultaneous full-waveform simulation

Tim T.Y. Lin, Felix J. Herrmann, Yogi A. Erlangga

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Summary: The fact that the computational complexity of wavefield simulation is proportional to the size of the discretized model and acquisition geometry, and not to the complexity of the simulated wavefield, is a major impediment within seismic imaging. By turning simulation into a compressive sensing problem-where simulated data is recovered from a relatively small number of independent simultaneous sources-we remove this impediment by showing that compressively sampling a simulation is equivalent to compressively sampling the sources, followed by solving a reduced system. As in compressive sensing, this allows for a reduction in sampling rate and hence in simulation costs. We demonstrate this principle for the time-harmonic Helmholtz solver. The solution is computed by inverting the reduced system, followed by a recovery of the full wavefield with a sparsity promoting program. Depending on the wavefield's sparsity, this approach can lead to significant cost reductions, in particular when combined with the implicit preconditioned Helmholtz solver, which is known to converge even for decreasing mesh sizes and increasing angular frequencies. These properties make our scheme a viable alternative to explicit time-domain finite-differences.

Original languageEnglish
Pages (from-to)2577-2581
Number of pages5
JournalSEG Technical Program Expanded Abstracts
Volume28
Issue number1
Publication statusPublished - Dec 1 2009

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Geophysics

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    Lin, T. T. Y., Herrmann, F. J., & Erlangga, Y. A. (2009). Compressive simultaneous full-waveform simulation. SEG Technical Program Expanded Abstracts, 28(1), 2577-2581.