An optimal parameterization for full waveform inversion in anisotropic media

T. Alkhalifah*, A. Guitton

*Corresponding author for this work

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

5 Scopus citations

Abstract

Full waveform inversion (FWI) in transversely isotropic media usually requires abundant a priori information, like well data and smoothness assumptions, to make the FWI converge to a plausible solution. The proper model parameterization in transversely isotropic (TI) media with a vertical symmetry axis (VTI) can alleviate some of these limitations. Considering the limitations of our field data acquisition to constrain the long wavelength vertical velocity (the depth information) in VTI media, we test a parameterization using the horizontal velocity, ζ and ϵ that is relatively immune from this specific lack of long wavelength description of the background model. We test our claim with a VTI Marmousi II data set modeled under the elastic assumption. The initial velocity is extracted from a smoothed version of the true normal moveout and horizontal velocity models to represent what we expect from the long wavelength analysis of our data (traveltimes). Having an inaccurate δ (equal to zero in this test) caused the inversion parameterized by the vertical velocity, δ, and ϵ to yield worse results than the inversion parameterized by the horizontal velocity, ζ and ϵ.

Original languageEnglish (US)
Title of host publication78th EAGE Conference and Exhibition 2016
Subtitle of host publicationEfficient Use of Technology - Unlocking Potential
PublisherEuropean Association of Geoscientists and Engineers, EAGE
ISBN (Electronic)9789462821859
StatePublished - 2016
Event78th EAGE Conference and Exhibition 2016: Efficient Use of Technology - Unlocking Potential - Vienna, Austria
Duration: May 30 2016Jun 2 2016

Other

Other78th EAGE Conference and Exhibition 2016: Efficient Use of Technology - Unlocking Potential
CountryAustria
CityVienna
Period05/30/1606/2/16

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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