The experience of separation of stable oil-water emulsions of the Taylakovskoye field using ultrasound

UDK: 665.622.43

DOI: 10.24887/0028-2448-2026-6-94-98

Key words: acoustic field, ultrasonic influence, activation of demulsifier, water-oil emulsions, demulsifier, field test

Authors: M.А. Cherevko (Tomskneft VNK JSC, RF, Tomsk); A.V. Dengaev (Gubkin University, RF, Moscow); M.I. Migunov (Gazprom Neft Companу Group, RF, Saint Petersburg); A.F. Maksimenko (Gubkin University, RF, Moscow); L.V. Ivanova (Gubkin University, RF, Moscow); B.V. Sargin (NPO Volna LLC, RF, Moscow)

The separation of stable oil-water emulsions is a significant part of the operating and energy costs in the process of field oil preparation. This is associated with the use of demulsifiers, which accelerate the emulsion separation process. In the process of field oil preparation, heating of incoming well products is used by burning associated hydrocarbon gas. The paper considers the possibility of using physical methods that can improve the efficiency of existing oil treatment methods at the Taylakovskoye field. The proposed method for increasing the rate of emulsion separation is based on exposure to a controlled ultrasonic field. Tests were carried out on «live» emulsions, for which the separation efficiency in an acoustic field was determined depending on the product temperature, the concentration of the demulsifier, the frequency and time of exposure to the emitter. Particular attention was paid to studying the formation causes and factors contributing to the stability of water-oil emulsions of the Taylakovskoye field. The research conducted led to the development of a technological solution for the use of an acoustic wave excitation system installed directly on the inlet pipelines of the complex oil treatment units. Conventional main oil pipelines were used as resonant channels for ultrasonic vibrations, contributing to additional activation of the demulsifier to separate well products into phases. The pilot work demonstrated the possibility of reducing the volume of demulsifiers used. This technological solution contributed to improving the quality of oil preparation at the current installation and reducing the temperature factor during product separation.

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