Wavefield extrapolation in pseudodepth domain

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8 Scopus citations

Abstract

Wavefields are commonly computed in the Cartesian coordinate frame. Its efficiency is inherently limited due to spatial oversampling in deep layers, where the velocity is high and wavelengths are long. To alleviate this computational waste due to uneven wavelength sampling, we convert the vertical axis of the conventional domain from depth to vertical time or pseudodepth. This creates a nonorthognal Riemannian coordinate system. Isotropic and anisotropic wavefields can be extrapolated in the new coordinate frame with improved efficiency and good consistency with Cartesian domain extrapolation results. Prestack depth migrations are also evaluated based on the wavefield extrapolation in the pseudodepth domain.© 2013 Society of Exploration Geophysicists. All rights reserved.
Original languageEnglish (US)
Pages (from-to)S81-S91
Number of pages1
JournalGeophysics
Volume78
Issue number2
DOIs
StatePublished - Feb 1 2013

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

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