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    Estimation of the anisotropy parameters from imaging moveout of diving wave in a factorized anisotropic medium

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    Type
    Article
    Authors
    Xu, Shibo
    Stovas, Alexey
    Alkhalifah, Tariq Ali cc
    KAUST Department
    Astronomy and Geophysical Research Institute
    Earth Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Seismic Wave Analysis Group
    Date
    2016-06-10
    Online Publication Date
    2016-06-10
    Print Publication Date
    2016-07
    Permanent link to this record
    http://hdl.handle.net/10754/614414
    
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    Abstract
    The importance of diving waves is being realized because they provide long-wavelength model information, which can be used to help invert for the reflection information in full-waveform inversion. The factorized model is defined here as a combination of vertical heterogeneity and constant anisotropy, and it admits closed-form description of the traveltime. We have used these resulting analytical formulas to describe the behavior of diving waves in a factorized anisotropic medium, and we used an approximate imaging moveout formulation (residual moveout after imaging) to update the velocity model when the wrong model parameters (isotropic assumption) were used for imaging. We then used these analytical representations of the image moveout to establish a semblance analysis framework to search for the optimal anisotropic parameters. We have also discussed different parameterizations of the factorized medium to find the one that gave the best accuracy in anisotropy parameters estimation.
    Citation
    Estimation of the anisotropy parameters from imaging moveout of diving wave in a factorized anisotropic medium 2016, 81 (4):C139 GEOPHYSICS
    Sponsors
    We would like to thank W. Weibull for providing the modeling and RTM codes and C. Wang from Tongji University for his useful discussions. We acknowledge the China Scholarship Council and the ROSE Project for financial support and KAUST for its support. We also would like to acknowledge the associate editor and the reviewers for their instructive comments.
    Publisher
    Society of Exploration Geophysicists
    Journal
    GEOPHYSICS
    DOI
    10.1190/geo2015-0600.1
    Additional Links
    http://library.seg.org/doi/10.1190/geo2015-0600.1
    ae974a485f413a2113503eed53cd6c53
    10.1190/geo2015-0600.1
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Earth Science and Engineering Program

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