Reduction of dispersive ground-roll using time delay spectrometry

Peter Møller Kjeldsen, Henrik C Larsen

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    Abstract

    Velocity filtering seismic traces requires fulfilment of the sampling theorem in the time domain and in the space domain. Since the latter condition is seldom met in exploration seismics, a method based on τ-p transformation combined with time varying filtering is proposed for solving the problem of reducing dispersive ground-roll in a seismic trace. Although it is possible to mask out ground-roll in the τ-p domain, mapping of the τ-p domain back into the original x-t domain involves numerical difficulties because the used inverse discrete Radon transform is ill-posed. To circumvent this problem the seismic trace is applied to a time varying filter with a stop-band which at any instant corresponds to the instantaneous frequency of the ground-roll, thus reducing the ground-roll with minimum distortion of the wanted seismic rate
    Original languageEnglish
    JournalI E E E International Conference on Acoustics, Speech and Signal Processing. Proceedings
    Volume2
    Pages (from-to)101-104
    ISSN1520-6149
    DOIs
    Publication statusPublished - 1992
    EventIEEE International Conference on Acoustics, Speech, and Signal Processing - San Francisco, CA
    Duration: 1 Jan 1992 → …

    Conference

    ConferenceIEEE International Conference on Acoustics, Speech, and Signal Processing
    CitySan Francisco, CA
    Period01/01/1992 → …

    Bibliographical note

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