Method and apparatus for determining dielectric permittivity of

Details Method and apparatus for determining dielectric permittivity of Method and apparatus for determining dielectric permittivity of

1984-04-13

1987-03-24

Karlsen, Ernest F.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

With radiant energy or nonconductive-type transmitter

324341, G01V 318, G01V 338

Patent

active

046528288

ABSTRACT:
Well logging techniques are set forth for obtaining improved measurements of formation dielectric permittivity, conductivity, and water-filled porosity. The effects of dielectric and conductivity frequency dispersion are considered and utilized. In a disclosed embodiment, a corrected dielectric permittivity of a formation surrounding a borehole is determined using the following steps: deriving a measured value of formation dielectric permittivity from a logging device which traversed the borehole; deriving a measured value of formation conductivity from a logging device which traversed the borehole; determining a formation dielectric permittivity dispersion value as a function of the measured conductivity; and determining a corrected formation dielectric permittivity from the measured value of dielectric permittivity and the dispersion value.

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Freedman et al, "An Automated Frequency Domain Technique", J. Phys. E. Sci. Instrum., vol. 12, 1979, pp. 899-903.
Palaith et al, "Improved Accuracy for Dielectric Data", The Institute of Physics, 1983, pp. 227-230.

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