«Oilfield engineering»

Improvement of the corrosion monitoring system of the hydrocarbons production facilities of the Achimov sediments

UDC: 622.279:620.193/.197
DOI: 10.33285/0207-2351-2022-3(639)-54-61

Authors:

¹ Gazprom dobycha Urengoy, Novy Urengoy, Russia

Keywords: Urengoyskoye oil and gas condensate field, Achimov deposits, corrosion, carbon dioxide corrosion, corrosion monitoring, angle pressure regulator, angle choke, corrosion control unit, corrosion rate

Annotation:

The problem of carbon dioxide corrosion in the Russian Federation has become urgent with the commissioning of promising domestic gas and gas condensate fields, characterized by the presence of carbon dioxide in the extracted products composition. Its presence in combination with a number of additional factors stimulates the intensive course of the process of carbon dioxide corrosion. This problem was faced by LLC "Gazprom Dobycha Urengoy" when developing the 2nd production area of the Achimov deposits in the Urengoyskoye oil and gas condensate field. The main solution to provide anti-corrosion protection was the inhibitor protection introduction. In order to provide the high level of anti-corrosion efficiency, a corrosion monitoring system has been used which includes a set of methods, including the measurement of the corrosion rate. To ensure a high level of anti-corrosion measures reliability, the implemented corrosion monitoring system requires constant modernization. The article presents technical solutions, developed and implemented at the facilities of Gazprom Dobycha Urengoy lately.

This article describes a redesigned inter-flanged device with segment coupons that are flush mounted with the pipe wall. These nodes make it possible to obtain a more reliable assessment of the corrosion rate, excluding the influence of "parasitic" hydrodynamic factors on the corrosion rate and showing the distribution of the corrosion rate over the entire inner surface of the pipe within the pipeline section in which the inter-flanged device is installed.

Information is provided on the approbation of an integrated system for measuring the rate of corrosion using the method of electrical resistance and the gravimetric method for measuring the rate of corrosion in one of the wells of the 2nd production area of the Achimov deposits of the Urengoyskoye oil and gas condensate field. Using the integrated corrosion rate measurement system, the effectiveness of the used corrosion inhibitor has been confirmed in a wide range of operating parameters of the well operation. The regularity of the decrease of the well product corrosive aggression is revealed when the angle pressure regulator is covered. A recommendation is given on the operation of angle adjusters in the maximum cover mode.

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