«Onshore and offshore oil and gas well construction»

Increasing the efficiency of recycled water purification in oil field

UDC: 622.276.438
DOI: -

Authors:

¹ Perm National Research Polytechnic University, Perm, Russia

Keywords: intensification of oil production, purification of recycled water, reservoir pressure maintenance system, coalescing units, bulk filter material, emulsified oil, mechanical impurities, fine filters

Annotation:

The problem of improving the water treatment equipment that provides reservoir pressure maintenance (RPM) systems in order to ensure the required fineness of water purification injected into the productive formation from emulsified oil and mechanical impurities remains relevant. The authors of the article consider traditional and promising technologies for recycled water purification used in oil fields: water settling, centrifugation and the use of filters. It is noted that the use of cascade filtration systems, which include coalescing units with oleophobic filter materials, allows for the most efficient purification of circulating water from emulsified oil, and the use of fine filters with filter elements made of polypropylene-based materials ensures the separation of solid mechanical impurities larger than 5 μm. The results of experimental studies of circulating water purification from emulsified oil using oleophobic filter material Ore Filter are presented. The design of a laboratory stand for conducting studies to assess the efficiency of cleaning model liquids from oil products is described and the parameters of model liquids are given. The dependences of the change of the emulsified oil content in the purified liquid on the flow rate through the filter material are obtained. Using the example of the "BRIF" distribution, measurement and filtration complexes manufactured by "Novomet-Perm" JSC, technical solutions for automating the process of cleaning circulating water of reservoir pressure maintenance systems from fine particles of mechanical impurities are described.

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