Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Patent
1987-02-02
1988-10-25
Eisenzopf, Reinhard J.
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
047806796
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, an estimated low frequency conductivity of a formation surrounding a borehole is determined using the following steps: deriving a measured value of formation high frequency conductivity from a logging device which traversed the borehole; determining a formation conductivity dispersion ratio as a function of the measured conductivity; and determining an estimated low frequency conductivity from the measured value of high frequency conductivity and the dispersion ratio.
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Baker Paul L.
Kenyon William E.
Eisenzopf Reinhard J.
Lee Peter
Novack Martin
Schlumberger Technology Corp.
Smith Keith
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