1887
Volume 31 Number 6
  • E-ISSN: 1365-2478

Abstract

A

Using approximate boundary conditions, expressions for electromagnetic fields have been derived for a thin, highly resistive layer lying between two homogeneous layers excited by an electric dipole grounded on the surface of the earth. The variations of the fields with the parameter (ratio of the transverse resistance of the thin layer to the transverse resistance of the first layer) were studied in relation to frequency, time, the normalized separation source—receiver, and the angle between the source and the radius to the observation point. For a value of (ratio of thickness of second layer to the thickness of the first layer) approximately equal to 0.2, the general three‐layer medium case gives the same results as this approach. It was found that the electric fields have a very strong dependence on the parameter (transverse resistance) which characterizes the thin, highly resistive layer. However, the magnetic fields depend only very weakly on this parameter.

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/content/journals/10.1111/j.1365-2478.1983.tb01099.x
2006-04-27
2020-07-16
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References

  1. Anderson, W. L.1975, Improved digital filters for evaluating Fourier and Hankel transform Integral, US Geological Survey Report, USGS‐GD‐75‐012.
  2. Azad, J.1977, Direct detection of hydrocarbons with electrical transients, 47th Annual International Meeting of the SEG, Calgary , 1977.
    [Google Scholar]
  3. Keller, G. V. and Frischknecht, F. C.1966, Electrical Methods in Geophysical Prospecting, Pergamon Press, Oxford .
    [Google Scholar]
  4. Powell, J. A.1980, Electric transient surveys for hydrocarbons, Elflex Research & Exploration of Texas, Inc., paper presented at the 50th Annual International Meeting of the SEG, Houston , Texas , 1980.
    [Google Scholar]
  5. Snyder, D. D., Kolvoord, R. W., Frangos, W., Bajwa, Y., Fleming, D. B. and Tasci, T. M.1980, Exploration for Petroleum Using Complex Resistivity Measurements, Exploration Data Consultants, Denver .
    [Google Scholar]
  6. Ward, S. H.1967, Mining Geophysics II, Society of Exploration Geophysicists, Tulsa .
    [Google Scholar]
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