Electricity: measuring and testing – Of geophysical surface or subsurface in situ
Patent
1982-04-22
1983-08-09
Strecker, Gerard R.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
324366, G01V 324
Patent
active
043981518
ABSTRACT:
An apparatus is disclosed for borehole measurements of the induced polarization of earth formations. The apparatus consists of an induced polarization logger capable of measuring both in-phase and quadrature conductivities in the frequency domain. A method is described which uses these measurements to determine cation exchange capacity per unit pore volume, Q.sub.v, brine conductivity, C.sub.w, and oil and water saturations, S.sub.o and S.sub.w, in shaly sands.
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Waxman et al.; Electrical Conductivities in Oil-Bearing Shaly Sands, SPE Journal, Jun. 1968, pp. 107-122.
Waxman et al.; "Electrical Conductivities in Shaly Sands-I The Relation Between, . . . II, The Temperature . . . ", Journal of Petroleum Tech. 1974, pp. 213-225.
Vinegar Harold J.
Waxman Monroe H.
Shell Oil Company
Strecker Gerard R.
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