Forward modeling by a Fourier method.

D. D. Kosloff, E. Baysal

Research output: Contribution to journalArticlepeer-review

Abstract

A Fourier or pseudospectral forward-modeling algorithm for solving the two-dimensional acoustic wave equation is presented. The method utilizes a spatial numerical grid to calculate spatial derivatives by the fast Fourier transform. Time derivatives which appear in the wave equation are calculated by second-order differencing. The scheme requires fewer grid points than finite-difference methods to achieve the same accuracy. It is therefore believed that the Fourier method will prove more efficiency than finite-difference methods, especially when dealing with three-dimensional models. The Fourier forward-modeling method was tested against two problems, a single-layer problem with a known analytic solution and a wedge problem which was also tested by physical modeling. The numerical results agreed with both the analytic and physical model results. Furthermore, the numerical model facilitates the explanation of certain events in the time section of the physical model which otherwise could not easily be taken into account.-Authors

Original languageEnglish
Pages (from-to)1402-1412
Number of pages11
JournalGeophysics
Volume47
Issue number10
DOIs
StatePublished - 1982

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