Imaging with surface multiples on OBN data with large acquisition gaps

    Research output: Contribution to conferencePaperpeer-review

    Abstract

    Multiples have now become a useful commodity in seismicimaging as they travel different paths compared to primary waves, thereby extending the illumination of the subsurface. With the popularity of acquisition using ocean-bottom nodes (OBN), it becomes necessary to explore the different strategies of imaging with multiples rather than removing them. We discuss few such methods of using surface-related multiples to get around the problem of imaging with a large acquisition gap, e.g., due to a platform. We test the ‘linear’ least-squares imaging method that incorporates surface-related multiples via re-injection of measured data on numerically generated OBN data with a large acquisition gap. To reduce the dependency of such methods on dense surface acquisition, we will propose a ‘non-linear’ inversion approach in which the surface multiples are modeled from the original source field. Further improving the imaging result with such acquisition constraint, we build a ‘hybrid’ method that combines the ‘non-linear’ imaging method with the conventional ‘linear’ multiple imaging method. We demonstrate the methods on 2-D numerical data. Despite large acquisition gaps, the results indicate mitigation of effects on the image previously caused by incomplete data.
    Original languageEnglish
    Pages4624-4628
    Number of pages5
    DOIs
    Publication statusPublished - 2019
    EventSEG International Exposition and Annual Meeting 2019 - San Antonio, United States
    Duration: 15 Sep 201920 Sep 2019

    Conference

    ConferenceSEG International Exposition and Annual Meeting 2019
    Abbreviated titleSEG 2019
    CountryUnited States
    Period15/09/1920/09/19

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