Internal corrosion is the most common cause of product leaks from oilfield pipelines. In Udmurtneft named after V.I. Kudinov PJSC the part of such pipelines leaks is 68.8 %. Corrosion also has a significant influence on a downhole equipment operation. For Udmurtneft oil wells share of complications caused by corrosion is 43.1%. The second most common complicating factor of oil production is pumps clogging with iron sulfides. At Udmurtneft» oil fields the part of complications of oil production in iron sulfides sediments form is 17.8 %. Statistical analysis of well failures due to formation of iron salts and oxides revealed corrosive origin of iron sulfides. Statistical analysis of well failures due to corrosion and due to clogging with iron sulfides identified contamination of productive formations with sulfate-reducing bacteria as one of the equipment operating time for failure determining variables. The issue of targeted use of protection technologies meaning the determination of the most susceptible to biocorrosion objects is relevant as the practice of using chemical methods of countering microbiological contamination indicates high costs for the protection of oil field equipment. Performed by detecting planktonic forms of bacteria in the volume of liquid standard method of detecting microbiological contamination does not allow assessing the possibility and intensity of biocorrosion. An activity of adhered forms of bacteria (bacteria that have formed stable biocenoses on the steel surface of oil field equipment) is more indicative from the corrosion point of view. In 2022 specialists of Izhevsk Petroleum Science Center have tested the method of biosensing oil collecting pipeline systems using special devices-traps of the adhered forms of bacteria at oil fields of Udmurtneft named after V.I. Kudinov in order to determine the activity of the adhered forms of sulfate-reducing bacteria and assess their contribution to the pipeline infrastructure corrosion wear.
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