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    Time-domain incomplete Gauss-Newton full-waveform inversion of Gulf of Mexico data

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    Type
    Conference Paper
    Authors
    AlTheyab, Abdullah cc
    Wang, Xin
    Schuster, Gerard T. cc
    KAUST Department
    Center for Subsurface Imaging and Fluid Modeling
    Earth Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2013-08-19
    Online Publication Date
    2013-08-19
    Print Publication Date
    2013-09
    Permanent link to this record
    http://hdl.handle.net/10754/593673
    
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    Abstract
    We apply the incomplete Gauss-Newton full-waveform inversion (TDIGN-FWI) to Gulf of Mexico (GOM) data in the space-time domain. In our application, iterative least-squares reverse-time migration (LSRTM) is used to estimate the model update at each non-linear iteration, and the number of LSRTM iterations is progressively increased after each non-linear iteration. With this method, model updating along deep reflection wavepaths are automatically enhanced, which in turn improves imaging below the reach of diving-waves. The forward and adjoint operators are implemented in the space-time domain to simultaneously invert the data over a range of frequencies. A multiscale approach is used where higher frequencies are down-weighted significantly at early iterations, and gradually included in the inversion. Synthetic data results demonstrate the effectiveness of reconstructing both the high- and low-wavenumber features in the model without relying on diving waves in the inversion. Results with Gulf of Mexico field data show a significantly improved migration image in both the shallow and deep sections.
    Citation
    AlTheyab, A., Wang, X., & Schuster, G. T. (2013). Time-domain incomplete Gauss-Newton full-waveform inversion of Gulf of Mexico data. SEG Technical Program Expanded Abstracts 2013. doi:10.1190/segam2013-1478.1
    Publisher
    Society of Exploration Geophysicists
    Journal
    SEG Technical Program Expanded Abstracts 2013
    Conference/Event name
    SEG Technical Program Expanded Abstracts 2013
    DOI
    10.1190/segam2013-1478.1
    Additional Links
    http://library.seg.org/doi/abs/10.1190/segam2013-1478.1
    ae974a485f413a2113503eed53cd6c53
    10.1190/segam2013-1478.1
    Scopus Count
    Collections
    Conference Papers; Physical Science and Engineering (PSE) Division; Earth Science and Engineering Program

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