Angle gathers in wave-equation imaging for VTI media

Tariq Alkhalifa, Sergey Fomel

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Angles in common-image angle-domain gathers refer to the scattering angle at the reflector and provide a natural access to analyzing migration velocities and amplitudes. In the case of anisotropic media, the importance of angle gathers is enhanced by the need to properly estimate multiple anisotropic parameters for a proper representation of the medium. We extract angle gathers for each downward-continuation step from converting offset-space-frequency planes into angle-space planes simultaneously with applying the imaging condition in a transversely isotropic (VTI) medium. The analytic equations, though cumbersome, are exact within the framework of the acoustic approximation. They are also easily programmable and show that angle gather mapping in the case anisotropic media differs from its isotropic counterpart, difference depending mainly on the strength of anisotropy.

Original languageEnglish (US)
Title of host publication79th Society of Exploration Geophysicists International Exposition and Annual Meeting 2009, SEG 2009
PublisherSociety of Exploration Geophysicists
Pages2899-2903
Number of pages5
ISBN (Print)9781615675661
StatePublished - Jan 1 2009
Event79th Society of Exploration Geophysicists International Exposition and Annual Meeting 2009, SEG 2009 - Houston, United States
Duration: Oct 25 2009Oct 30 2009

Publication series

Name79th Society of Exploration Geophysicists International Exposition and Annual Meeting 2009, SEG 2009

Conference

Conference79th Society of Exploration Geophysicists International Exposition and Annual Meeting 2009, SEG 2009
CountryUnited States
CityHouston
Period10/25/0910/30/09

ASJC Scopus subject areas

  • Geophysics

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