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    A recipe for practical full waveform inversion in anisotropic media

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    Type
    Conference Paper
    Authors
    Alkhalifah, Tariq Ali cc
    Plessix, René Édouard
    KAUST Department
    Earth Science and Engineering Program
    Environmental Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Seismic Wave Analysis Group
    Date
    2014-03-28
    Online Publication Date
    2014-03-28
    Print Publication Date
    2014-05
    Permanent link to this record
    http://hdl.handle.net/10754/575791
    
    Metadata
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    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. Copyright © 2014 by the European Association of Geoscientists & Engineers. All rights reserved.
    Citation
    Alkhalifah, T., & Plessix, R.-É. (2014). A recipe for practical full-waveform inversion in anisotropic media: An analytical parameter resolution study. GEOPHYSICS, 79(3), R91–R101. doi:10.1190/geo2013-0366.1
    Publisher
    Society of Exploration Geophysicists
    Journal
    GEOPHYSICS
    Conference/Event name
    6th Saint Petersburg International Conference and Exhibition on Geosciences 2014: Investing in the Future
    ISBN
    9781632665393
    DOI
    10.1190/geo2013-0366.1
    ae974a485f413a2113503eed53cd6c53
    10.1190/geo2013-0366.1
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