Improved Linear Filter Coefficients for Application in Apparent Resistivity Computations

D.J. O’Neill

doi:10.1071/EG975104

ISSN: 0812-3985
E-ISSN: 1834-7533

Improved Linear Filter Coefficients for Application in Apparent Resistivity Computations
Authors D.J. O’Neill^a
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^a Water Conservation and Irrigation Commission, , N.S.W.
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 6, Issue 4, Dec 1975, p. 104 - 109
DOI: https://doi.org/10.1071/EG975104
- Published online: 01 Dec 1975

Abstract

Linear filter theory provides a rapid means of calculating resistivity transforms and apparent resistivities, thereby facilitating resistivity sounding interpretation. The coefficient sets previously associated with the method, however, are inadequate for reflection coefficients approaching minus one. This paper presents, for the Schlumberger electrode configuration, new coefficients which significantly reduce this inadequacy, thus rendering the linear filter method an accurate and particularly rapid means of executing apparent resistivity computations.

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1975-12-01

2026-01-18

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References

BRIGHAM, E. ORAN, 1974, The Fast Fourier Transform, Prentice-Hall, New-Jersey, p. 164.
GHOSH, D.P., 1971a, The application of linear filter theory to the direct interpretation of geoelectrical resistivity sounding measurements. Geophysical Prospecting, 19, pp. 192-217.
GHOSH, D.P., 1971b, Inverse filter coefficients for the computation of apparent resistivity standard curves for a horizontally stratified earth. Geophysical Prospecting, 19, pp. 769-775.
KOEFOED, O., 1968, The application of the kernel function in interpreting geoelectrical measurements, Geoexploration Monographs, Series 1, No. 2, Gerbruder Borntraeger, Berlin-Stuttgart.
KOEFOED, O., 1972, A note on the linear filter method of interpreting resistivity sounding data. Geophysical Prospecting, 20, pp. 403-405.
KOEFOED, O., GHOSH, D.P., and POLMAN, G.J., 1972, Computation of type curves for electromagnetic depth sounding with a horizontal transmitting coil by means of a digital linear filter, Geophysical Prospecting, 20, pp. 406-420.
MOONEY, H.M., ORELLANA, E., PICKETT, H., and TORNEIM, L, 1966, A resistivity computation method for layered earth models, Geophysics, 31, pp. 192-203.
ORELLANA, E., and MOONEY, H.M., 1966, Master tables and curves for vertical electric sounding over layered structures, Inter-ciencia, Madrid.

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Article Type: Research Article

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Improved Linear Filter Coefficients for Application in Apparent Resistivity Computations

Abstract

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