Method for correcting an electrical log for the presence of shale in a formation
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United States of America Patent
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Aug 9, 1983
Issued Date -
N/A
app pub date -
Apr 22, 1982
filing date -
Jan 25, 1980
priority date (Note) -
Expired
status (Latency Note)
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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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