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    Diffraction imaging and time-migration velocity analysis using oriented velocity continuation

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    Type
    Article
    Authors
    Decker, Luke cc
    Merzlikin, Dmitrii cc
    Fomel, Sergey cc
    Date
    2017-03-01
    Permanent link to this record
    http://hdl.handle.net/10754/679210
    
    Metadata
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    Abstract
    We perform seismic diffraction imaging and time-migration velocity analysis by separating diffractions from specular reflections and decomposing them into slope components. We image the slope components using migration velocity extrapolation in time-space-slope coordinates. The extrapolation is described by a convection-type partial differential equation and implemented in a highly parallel manner in the Fourier domain. Synthetic and field data experiments show that the proposed algorithms are able to detect accurate time-migration velocities by measuring the flatness of diffraction events in slope gathers for single- and multiple-offset data.
    Citation
    Decker, L., Merzlikin, D., & Fomel, S. (2017). Diffraction imaging and time-migration velocity analysis using oriented velocity continuation. GEOPHYSICS, 82(2), U25–U35. doi:10.1190/geo2016-0141.1
    Sponsors
    We thank KAUST, Shell, and the sponsors of TCCS for their financial support of this work and E. Landa for inspiring discussions.
    Publisher
    SOC EXPLORATION GEOPHYSICISTS
    Journal
    GEOPHYSICS
    DOI
    10.1190/GEO2016-0141.1
    Additional Links
    https://library.seg.org/doi/10.1190/geo2016-0141.1
    ae974a485f413a2113503eed53cd6c53
    10.1190/GEO2016-0141.1
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