EFFECT OF ELECTRIC FIELD PARAMETERS ON RHEOLOGICAL CHARACTERISTICS OF HEAVY OIL EMULSION

Abstract

Abstract: The electrorheological characteristics of heavy oil emulsion in an oilfield were experimentally studied by using an electrorheometer. Taking the viscosity reduction rate as the evaluation index, the influence of electric field parameters (electric field strength, electric field frequency, etc.) and non-electric field parameters (temperature, shearing rate, etc.) on the rheological characteristics of heavy oil was systematically and comprehensively explored under the action of high-frequency/high-voltage pulsed AC electric field. The orthogonal experimental design method was used to compare the influence of electric field parameters and non-electric field parameters on the rheological characteristics of heavy oil. The results showed that among the electric field parameters, the electric field strength had the greatest influence, followed by electric field frequency and duty cycle; among the non-electric field parameters, temperature had the greatest influence, followed by water content and shear rate. In addition, the electrorheological experiment of sand-containing heavy oil emulsion was carried out, and the optimal electric field strength and electric field frequency values obtained were similar to those of sand-free heavy oil emulsion.

Key words: water-in-oil emulsion, electrorheological characteristics, viscosity reduction rate, electric field strength, orthogonal experimental design

References

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