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    Generalized differential semblance optimization

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    EAGE_GDSOd.pptx
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    11.00Mb
    Format:
    Microsoft PowerPoint 2007
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    Type
    Conference Paper
    Authors
    Zhang, S.
    Schuster, Gerard T. cc
    KAUST Department
    Center for Subsurface Imaging and Fluid Modeling
    Earth Science and Engineering Program
    Environmental Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2013-05-31
    Online Publication Date
    2013-05-31
    Print Publication Date
    2013
    Permanent link to this record
    http://hdl.handle.net/10754/577113
    
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    Abstract
    This paper inverts space-lags in the suboffset-domain CIGs instead of time-lags for velocity estimate. As a reminder, the conventional DSO is an image-domain method for wave-equation tomography, where the essence of this method is to focus the image at zero suboffset and minimize the image at nonzero suboffset. At each iteration, the velocity model is updated by smearing the image on the nonzero sub- offset along wavepath. The space-lag is used as a penalty operator which annihilates the image energy at nonzero lags, where this space-lag is independent of the velocity model. This new method, denoted as generalized DSO, treats the space-lag as a function of velocity model. It is an extension of the conventional DSO except it updates the velocity model not only by smearing the image on the nonzero suboffset as in conventional DSO but also by smearing the nonzero suboffset along the wavepath. The former minimizes the image in the nonzero suboffset and the latter minimizes the nonzero suboffset of the image. Both methods aim to focus the image energy at zero suboffset. The mathematical derivation and numerical examples are presented to demonstrate its effectiveness in velocity inversion.
    Citation
    Zhang, S., & Schuster, G. (2013). Generalized Differential Semblance Optimization. London 2013, 75th Eage Conference En Exhibition Incorporating SPE Europec. doi:10.3997/2214-4609.20130374
    Publisher
    EAGE Publications
    Journal
    London 2013, 75th eage conference en exhibition incorporating SPE Europec
    ISBN
    9781629937915
    DOI
    10.3997/2214-4609.20130374
    ae974a485f413a2113503eed53cd6c53
    10.3997/2214-4609.20130374
    Scopus Count
    Collections
    Conference Papers; Environmental Science and Engineering Program; Physical Science and Engineering (PSE) Division; Earth Science and Engineering Program

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