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    Application of the unwrapped phase inversion to land data without source estimation

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    segam2015-58735142E1.pdf
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    Type
    Article
    Authors
    Choi, Yun Seok
    Alkhalifah, Tariq Ali cc
    DeVault, Bryan
    KAUST Department
    Earth Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Seismic Wave Analysis Group
    Date
    2015-08-19
    Online Publication Date
    2015-08-19
    Print Publication Date
    2015-08-19
    Permanent link to this record
    http://hdl.handle.net/10754/593186
    
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    Abstract
    Unwrapped phase inversion with a strong damping was developed to solve the phase wrapping problem in frequency-domain waveform inversion. In this study, we apply the unwrapped phase inversion to band-limited real land data, for which the available minimum frequency is quite high. An important issue of the data is a strong ambiguity of source-ignition time (or source shift) shown in a seismogram. A source-estimation approach does not fully address the issue of source shift, since the velocity model and the source wavelet are updated simultaneously and interact with each other. We suggest a source-independent unwrapped phase inversion approach instead of relying on source-estimation from this land data. In the source-independent approach, the phase of the modeled data converges not to the exact phase value of the observed data, but to the relative phase value (or the trend of phases); thus it has the potential to solve the ambiguity of source-ignition time in a seismogram and work better than the source-estimation approach. Numerical examples show the validation of the source-independent unwrapped phase inversion, especially for land field data having an ambiguity in the source-ignition time.
    Citation
    Yunseok Choi*, Tariq Alkhalifah, and Bryan DeVault (2015) Application of the unwrapped phase inversion to land data without source estimation. SEG Technical Program Expanded Abstracts 2015: pp. 1225-1229. doi: 10.1190/segam2015-5873514.1
    Publisher
    Society of Exploration Geophysicists
    Journal
    SEG Technical Program Expanded Abstracts 2015
    DOI
    10.1190/segam2015-5873514.1
    Additional Links
    http://library.seg.org/doi/10.1190/segam2015-5873514.1
    ae974a485f413a2113503eed53cd6c53
    10.1190/segam2015-5873514.1
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Earth Science and Engineering Program

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