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    An optimized correlation-based full waveform inversion

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    Type
    Conference Paper
    Authors
    Choi, Yun Seok
    Alkhalifah, Tariq Ali cc
    KAUST Department
    Earth Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Seismic Wave Analysis Group
    Date
    2017-03-13
    Permanent link to this record
    http://hdl.handle.net/10754/664681
    
    Metadata
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    Abstract
    The conventional correlation-based objective function for FWI has a limitation: the desired (accurate) solution is not exactly located at the global minimum (or maximum) since the auto-correlation of the observed wavefield has some energy at non-zero time-lags. We propose two optimized correlation-based objective functions incorporating the auto-correlation term. Including this term in the new objective functions as a reference for the cross-correlation to fit locates the desired solution at the global minimum (or maximum). We derive the gradient expressions of the new objective functions using the adjoint-state method, where only two modelling steps are needed to calculate the gradients. The numerical examples show that FWI based on the new objective functions generate good convergent results, whereas the conventional correlation-based FWI does not.
    Citation
    Choi, Y., & Alkhalifah, T. (2016). An Optimized Correlation-based Full Waveform Inversion. 78th EAGE Conference and Exhibition 2016. doi:10.3997/2214-4609.201600642
    Publisher
    EAGE Publications
    Conference/Event name
    78th EAGE Conference and Exhibition 2016: Efficient Use of Technology - Unlocking Potential
    ISBN
    9789462821859
    DOI
    10.3997/2214-4609.201600642
    Additional Links
    http://www.earthdoc.org/publication/publicationdetails/?publication=84888
    ae974a485f413a2113503eed53cd6c53
    10.3997/2214-4609.201600642
    Scopus Count
    Collections
    Conference Papers; Physical Science and Engineering (PSE) Division; Earth Science and Engineering Program

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