DEMULSIFICATION AND DEHYDRATION OF AGING OIL EMULSION UNDER HIGH FREQUENCY AND HIGH VOLTAGE PULSED ELECTRIC FIELD

Abstract

Abstract: In this paper, based on the prepared aging oil W/O emulsion from Liuhua 11-1 oilfield, the influence of electric field intensity, frequency, waveform and moisture content on electric demulsification and dehydration under high frequency and high voltage electric field was investigated. A static electrostatic coalescing device with a centrifuge assisted to enhance the dehydration rate. The experiment results indicated that the phase inversion point of aging oil emulsion is between 40% and 50%, the optimal electric field parameter for W/O emulsion demulsification and dehydration is field strength (voltage) of 6 kV, frequency 2 kHz and AC square wave. The dehydration efficiency of stable W/O emulsion is 74.074% when the moisture content reaches 40%. These optimal electric field parameters do not vary with moisture content. This study can provide design references for the modification of aging oil treatment process in Liuhua oil field and a foundation for the improvement of production.

Key words: aging oil, high voltage and high frequency pulsed AC electric field, W/O emulsions, electric demulsification, centrifugal dehydration

CLC Number:

References

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