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    Full-waveform inversion with an exponential filter in wavenumber domain

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    full waveform.pdf
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    Description:
    Accepted manuscript
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    Type
    Conference Paper
    Authors
    Chang, Kai
    Song, Chao cc
    Alkhalifah, Tariq Ali cc
    Zhang, Haijiang
    KAUST Department
    Earth Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Seismic Wave Analysis Group
    Date
    2020-09-30
    Online Publication Date
    2020-09-30
    Print Publication Date
    2020-09-30
    Permanent link to this record
    http://hdl.handle.net/10754/665476
    
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    Abstract
    The gradient of full-waveform inversion (FWI) can be decomposed into a tomographic part, which is smooth (lowwavenumbers) and an image part, which is more sharp (highwavenumbers). Most of the FWI procedures need to update the smooth part first and gradually include the details to mitigate the cycle-skipping problem. The scattering angle filter for the gradient is one way to isolate the low-wavenumber part of the gradient at the early stage. However, it could be costly because of the extensions necessary for precise scattering angle control. Due to the relationship between the wavenumber and the scattering angle, the large scattering angles correspond to the low wavenumber component, which is usually what we want to update in our initial inversion steps. Thus, we use an exponential filter in the wavenumber domain and update the model in the wavenumber domain from low to high. The numerical result indicates that the inversion benefits from the wavenumber domain filter.
    Citation
    Chang, K., Song, C., Alkhalifah, T., & Zhang, H. (2020). Full-waveform inversion with an exponential filter in wavenumber domain. SEG Technical Program Expanded Abstracts 2020. doi:10.1190/segam2020-3427081.1
    Sponsors
    We would like to thank KAUST for supporting the study and Seismic Wave Analysis Group (SWAG) for fruitful discussions.The author Kai Chang also thanks to the China Scholar Coun-cil (CSC) for supporting his study in KAUST.
    Publisher
    Society of Exploration Geophysicists
    DOI
    10.1190/segam2020-3427081.1
    Additional Links
    https://library.seg.org/doi/10.1190/segam2020-3427081.1
    ae974a485f413a2113503eed53cd6c53
    10.1190/segam2020-3427081.1
    Scopus Count
    Collections
    Conference Papers; Physical Science and Engineering (PSE) Division; Earth Science and Engineering Program

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