Abstract
A cylindrical-shape sample cell was prepared to investigate the dependence of salt amounts in a water-in-crude oil emulsion system by measuring the dielectric properties in the frequency range from 10 2 Hz to 10 7 Hz with an impedance analyzer. High-sensitivity complex dielectric constant measurements were obtained after calibration with several fluids having known dielectric constants. From complex dielectric spectra, we observed two regions for frequency characteristics: conduction relaxation in the low-frequency region due to diusion by charge transport caused by impurities such as resins and asphaltenes in the continuous phase, and the dielectric-relaxation mechanism in the high-frequency region due to the modified Debye type where the relaxation time was in linear proportion to the salt content in the disperse phase of the water-in-crude oil emulsion system.
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