A recipe for practical full waveform inversion in anisotropic media

Tariq Alkhalifa*, R. Plessix

*Corresponding author for this work

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

Abstract

In representing the most common (first-order influence, and gravity induced) acoustic anisotropy, transversely isotropic with a vertical symmetry direction (VTI) medium, with the P-wave normal moveout velocity, delta, and eta, we obtain a perturbation radiation pattern that has limited tradeoff between the parameters. Since delta is weakly resolvable from the kinematics of wave propagation, we can use it to play the role that density plays in improving the data fit for an imperfect physical model that ignores the elastic nature of the Earth. An FWI scheme that starts from diving waves would benefit from representing the acoustic VTI model with the P-wave horizontal velocity, eta, and epsilon. In this representation, the diving waves will help us first resolve the horizontal velocity, and then reflections, if the nonlinearity is properly handled, could help us resolve eta, while epsilon comes at the end to improve the amplitude fit (instead of the density). The model update wavelength for acoustic anisotropic FWI is very much similar to that experienced for the isotropic case.

Original languageEnglish (US)
Title of host publication6th Saint Petersburg International Conference and Exhibition on Geosciences 2014
Subtitle of host publicationInvesting in the Future
PublisherEuropean Association of Geoscientists and Engineers, EAGE
Pages68-72
Number of pages5
ISBN (Print)9781632665393
StatePublished - Jan 1 2014
Event6th Saint Petersburg International Conference and Exhibition on Geosciences 2014: Investing in the Future - Saint Petersburg, Russian Federation
Duration: Apr 7 2014Apr 10 2014

Publication series

Name6th Saint Petersburg International Conference and Exhibition on Geosciences 2014: Investing in the Future

Conference

Conference6th Saint Petersburg International Conference and Exhibition on Geosciences 2014: Investing in the Future
CountryRussian Federation
CitySaint Petersburg
Period04/7/1404/10/14

ASJC Scopus subject areas

  • Geochemistry and Petrology

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