Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1974-12-09
1977-02-22
Strecker, Gerard R.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
G01V 310, G01V 318
Patent
active
040094340
ABSTRACT:
Radio frequency electromagnetic fields are used to excite earth formations in the vicinity of a well borehole. The total field amplitude at a single coil receiver and at a dual coil receiver are detected and signals representative thereof are combined according to a predetermined relationship to obtain the relative permittivity and resistivity of the earth formations. By combining the measured permittivity with porosity measurements from another source according to predetermined relationships, the water saturation S.sub.w and residual oil saturation ROS may be determined and logged as a function of borehole depth.
REFERENCES:
patent: 3075142 (1963-01-01), Albright et al.
patent: 3086168 (1963-04-01), Buckner
patent: 3166708 (1965-01-01), Millican
patent: 3259836 (1966-07-01), Oshry
patent: 3551797 (1970-12-01), Gouilloud et al.
patent: 3849721 (1974-11-01), Calvert
Antonov et al., Two Frequency Dielectric Induction Logging with Two Sondes Geol., Geofiz., 9, No. 4, pp. 94-101 (1968).
Daev, D.S. Dielectric Induction Logging Izv. Vyssh. Ucheb. Zaved., Geol. Razved. 8, No. 11, pp. 110-119 (1965).
McKinlay Philip F.
Meador Richard A.
Beard William J.
Ries C. G.
Strecker Gerard R.
Texaco Inc.
Whaley T. H.
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