Transmitter waveform and receiver transfer function modelling in time domain induced polarization

Esben Auken; Gianluca Fiandaca

doi:10.1071/ASEG2012ab323

ISSN: 2202-0586
E-ISSN:

oa Transmitter waveform and receiver transfer function modelling in time domain induced polarization
Authors Esben Auken^a and Gianluca Fiandaca^b
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^a Associate prof. HydroGeophysics Group Aarhus University, , Denmark, [email protected] ^b Post doc, guest researcher at Aarhus University University of Palermo, Italy, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2012, Issue ASEG2012 - 22nd Geophysical Conference, Dec 2012, p. 1 - 3
DOI: https://doi.org/10.1071/ASEG2012ab323
- Published online: 01 Dec 2012

Abstract

Summary

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. 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 low-pass filters of the receiver system, in order to extract 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 plumes.

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2012-12-01

2026-01-18

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References

Auken, E., Christiansen, A. V., Jacobsen, B. H., Foged, N., Sorensen, K. I. 2005. Piecewise 1d Laterally Constrained Inversion Of Resistivity Data. Geophysical Prospecting 53 497-506.
Honig, M., Tezkan, B. 2007. 1d And 2d Cole-Cole-Inversion Of Time-Domain Induced-Polarization Data. Geophysical Prospecting 55 117-133.
Hordt, A., Hanstein, T., Honig, M., Neubauer, F. M. 2006. Efficient Spectral Ip-Modelling In The Time Domain. Journal Of Applied Geophysics 59 152-161.
Johansen, H. K., Sorensen, K. I. 1979. Fast Hankel Transforms. Geophysical Prospecting 27 876-901.
Koefoed, O. 1979. Geosounding Principles, 1. Elsevier. Oldenburg, D. W., Li, Y. 1994. Inversion Of Induced Polarization Data. Geophysics 59(9), 1327-1341.
Pelton, W. H., Ward, S. H., Hallof, P. G., Sill, W. R., Nelson, P. H. 1978. Mineral Discrimination And Removal Of Inductive Coupling With Multifrequency Induced-Polarization. Geophysics 43(3), 588-609.
Seigel, H. O. 1959. Mathematical Formulation And Type Curves For Induced Polarization. Geophysics 24(3), 547-565.
Tombs, J. M. C. 1981. The Feasibility Og Making Spectral Ip Measurements In The Time Domain. Geoexploration 19 90-102.

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Article Type: Research Article

Keyword(s): filter; inversion; IP; Time domain; waveform

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