Importance of transmitter waveform and receiver transfer function modelling in time domain induced polarization

G. Fiandaca, E. Auken, A.V. Christiansen, A. Gazoty

    Publikation: Bidrag til bog/rapport/konferenceproceedingsKonferenceartikel i proceedingspeer review

    Resumé

    In the computation of the forward response for Time Domain Induced Polarization the incomplete description of the transmitter waveform causes dramatic errors in the estimation of the magnitude and time characteristic of the IP phenomenon. In fact both the duration of the current pulse and the sequence of pulses used for the stacking procedure have a strong effect in the magnitude and shape of the IP decays. Furthermore, it is important to model, if present, the low-pass filters of the receivers, in order to use all the information contained in the acquired data. For these reasons, a new 1D forward and inversion algorithms have been developed using the full time decay of the IP response and the receiver transfer function to reconstruct the distribution of the four Cole-Cole parameters of the earth. The waveform implementation in the forward response for TDIP is a significant improvement that allows moving from a qualitative interpretation of TDIP data for recognition of anomaly patterns towards a quantitative analysis, able to discriminate soil lithotypes and, if present, some contamination patterns.

    OriginalsprogEngelsk
    TitelNear Surface 2011 - 17th EAGE European Meeting of Environmental and Engineering Geophysics
    ForlagEuropean Association of Geoscientists and Engineers
    ISBN (Trykt)978-90-73834-15-6
    DOI
    StatusUdgivet - 2011
    Begivenhed17th European Meeting of Environmental and Engineering Geophysics, Near Surface 2011 - Leicester, Storbritannien
    Varighed: 12 sep. 201114 sep. 2011

    Konference

    Konference17th European Meeting of Environmental and Engineering Geophysics, Near Surface 2011
    Land/OmrådeStorbritannien
    ByLeicester
    Periode12/09/1114/09/11

    Programområde

    • Programområde 2: Vandressourcer

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