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    The complexity of vibrator baseplate-ground interaction measured with a thin-film pressure pad and a downhole tool

    Access Status
    Fulltext not available
    Authors
    Dean, Tim
    Vermeer, P.
    Laycock, M.
    Tulett, J.
    Lane, D.
    Date
    2015
    Type
    Conference Paper
    
    Metadata
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    Citation
    Dean, T. and Vermeer, P. and Laycock, M. and Tulett, J. and Lane, D. 2015. The complexity of vibrator baseplate-ground interaction measured with a thin-film pressure pad and a downhole tool, in Proceedings of the 77th EAGE Conference and Exhibition 2015: Earth Science for Energy and Environment: Seismic Survey Design and Acquisition Hardware, Jun 1-4 2015, pp. 2126-2130. Madrid: EAGE.
    Source Title
    77th EAGE Conference and Exhibition 2015: Earth Science for Energy and Environment
    DOI
    10.3997/2214-4609.201413129
    ISBN
    9781510806627
    School
    WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
    URI
    http://hdl.handle.net/20.500.11937/60290
    Collection
    • Curtin Research Publications
    Abstract

    When a seismic hydraulic vibrator sweeps, it emits the signal we desire as well as a series of harmonics due to the non-linear behaviour of the hydraulic system and the baseplate-earth contact. The phase of the fundamental component of the transmitted signal also varies significantly from that of the pilot, which results in distortion of the Klauder wavelet. If we could record a more accurate estimate of the transmitted signal we could improve the signal itself (through the feedback loop of the vibrator's controller) and/or reduce its effects during processing. In this paper we show that the pressure distribution beneath the baseplate is more complex than previously thought but that thin-film pressure pads are a promising method for measuring the signature of a vibrator.

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