Using surface multiples to image across large acquisition gaps

    Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

    Abstract

    While surface-related multiples have long been considered as noise in seismic data, recently the consensus is changing to accept multiples as a tool for better illumination of the subsurface. In this paper we explore the different strategies of exploiting the surface-related multiples specifically in case of large acquisition gaps. Since surfacerelated multiples travel different propagation paths compared to the primaries, they illuminate a wider area making them vital in such cases of limited illumination. Existing imaging methods include surface-related multiples by reinjecting the total measured data as a downgoing wavefield. This however, makes the method dependent on a dense receiver configuration and, therefore, sensitive to missing data. Addressing a way around this problem, we will illustrate a `non-linear' inversion approach in which all multiples are modeled from the original source field. Such modeling makes the method less dependent on the receiver geometry, therefore, helping us in case of limited illumination. We also demonstrate a `hybrid' method on both synthetic and field data to overcome the effects of incomplete data by utilising the benefits of both `linear' and `non-linear' method. The results indicate substantial mitigation of effects on the image previously caused due to incomplete data and better images compared to the `linear' inversion methods.
    Original languageEnglish
    Title of host publication80th EAGE Conference and Exhibition 2018, 11-14 June, Copenhagen, Denmark
    Number of pages5
    DOIs
    Publication statusPublished - 2018
    Event80th EAGE Conference and Exhibition 2018: Opportunities presented by the energy transition - Copenhagen, Denmark
    Duration: 11 Jun 201814 Jun 2018
    Conference number: 80
    https://events.eage.org/2018/EAGE%20Annual%202018

    Conference

    Conference80th EAGE Conference and Exhibition 2018
    Abbreviated titleEAGE 2018
    CountryDenmark
    CityCopenhagen
    Period11/06/1814/06/18
    Internet address

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