Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Reexamination Certificate
2007-09-27
2010-02-09
Aurora, Reena (Department: 2858)
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
With radiant energy or nonconductive-type transmitter
C324S341000
Reexamination Certificate
active
07659723
ABSTRACT:
Resistivity measurements are made at a plurality of frequencies. An asymptotic high-frequency limit is determined and the electrical efficiency is estimated as a ratio of the high frequency resistivity limit to the low frequency resistivity. From the electrical efficiency, petrophysical parameters of a rock such as porosity and water saturation can be estimated.
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D.C. Herrick et al.; “Electrical Efficiency: A Pore Geometric Model for the Electrical Properties of Rocks”, SPWLA 34th Annual Logging Symposium, Paper HH, Jun. 13-16, 1993, pp. 1-20.
W. H. Meyer; “Field Measurements of Resistivity Dispersion Using Two Frequency MWD Propagation Resistivity Tools”, Petrophysics, vol. 41, No. 6, Nov.-Dec. 2000, pp. 492-502.
S.M. Haugland; “Frequency Dispersion Effects on LWD Propagation Resistivity Measurements”, SPE 96596, 2005 SPE Annual Technical Conference and Exhibition, Dallas, Texas, Oct. 9-12, 2005, pp. 1-14.
Herrick David C.
Itskovich Gregory B.
Meyer Wallace H.
Aurora Reena
Baker Hughes Incorporated
Madan & Sriram, P.C.
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