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    Wavefield separation by energy norm Born scattering

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    segam2017-17557895.1.pdf
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    Description:
    Expanded Abstract
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    Type
    Conference Paper
    Authors
    Sun, Bingbing
    Alkhalifah, Tariq Ali cc
    KAUST Department
    Earth Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Seismic Wave Analysis Group
    Date
    2017-08-17
    Online Publication Date
    2017-08-17
    Print Publication Date
    2017-08-17
    Permanent link to this record
    http://hdl.handle.net/10754/625396
    
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    Abstract
    In Reflection Based Waveform Inversion, the gradient is computed by cross-correlating the direct and Born scattered wavefield with their adjoints applied to the data residuals. In this case, the transmitted part of the Born scattered wavefield produces high wavenumber artifacts, which would harm the convergence of the inversion process. We propose an efficient Energy Norm Born Scattering (ENBS) to attenuate the transmission components of the Born modeling, and allow it to produce only reflections. ENBS is derived from the adjoint of the Energy Norm (inverse scattering) imaging condition and in order to get deeper insights of how this method works, we show analytically that given an image, in which reflectivity is represented by a Dirac delta function, ENBS attenuates transmission energy perfectly. We use numerical examples to demonstrate that ENBS works in both the time and the frequency domain. We also show that in reflection waveform inversion (RWI) the wave path constructed by ENBS would be cleaner and free of high wavenumber artifacts associated with conventional Born scattering.
    Citation
    Sun B, Alkhalifah T (2017) Wavefield separation by energy norm Born scattering. SEG Technical Program Expanded Abstracts 2017. Available: http://dx.doi.org/10.1190/segam2017-17557895.1.
    Publisher
    Society of Exploration Geophysicists
    Journal
    SEG Technical Program Expanded Abstracts 2017
    DOI
    10.1190/segam2017-17557895.1
    Additional Links
    http://library.seg.org/doi/10.1190/segam2017-17557895.1
    ae974a485f413a2113503eed53cd6c53
    10.1190/segam2017-17557895.1
    Scopus Count
    Collections
    Conference Papers; Physical Science and Engineering (PSE) Division; Earth Science and Engineering Program

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