Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Patent
1986-07-28
1990-11-20
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
With radiant energy or nonconductive-type transmitter
G01V 328
Patent
active
049721496
ABSTRACT:
The present invention is a thin bed resistivity well logging system and method which includes a transmitter transmitting electromagnetic energy into an earth formation, from within a borehole traversing the earth's formation, at a frequency lying within a range of frequencies from 500 kilohertz to 4 megahertz. The system, a portion of which is located in the borehole, determines the true resistivity of a thin strata in accordance with the transmitted electromagnetic energy that has propagated through the earth's formation.
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Grubb et al., "Borehole Measurements of Conductivity and Dielectric Constant in the 300 kHz to 2 MHz Frequency Range", Radio Science, vol. 11, No. 4, Apr., 1976, pp. 275-283.
Cox Percy T.
Johnson, Jr. Donald L.
Nussbaum Theodore W.
Warren Wayne F.
Edmonds Warren S.
Eisenzopf Reinhard J.
Gillespie Ronald G.
Kulason Robert A.
O'Loughlin James J.
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