«Equipment and technologies for oil and gas complex»

Scientific basis of simulation modeling when assessing the resistance of pipe steels to carbon dioxide corrosion in gas fields

UDC: 620.197.3
DOI: -

Authors:

¹ Gazprom VNIIGAZ, Moscow region, Russia

Keywords: corrosion testing, corrosion rate, localized corrosion, carbon and low alloy steels, moisture condensation, variable wetting

Annotation:

The authors of the article consider the operational conditions that have the main impact on internal corrosion processes i gas fields. The scientific-methodological approach developed in LLC "Gazprom VNIIGAZ" allows reproducing, in model conditions, typical and most dangerous local defects (corrosion pitting), similar to those ones that are formed at real gas production facilities with an increased CO2 content. Within the framework of simulation modeling, the resistance to local carbon dioxide corrosion of pipe steel grades in the most aggressive environments (with moisture condensation on the upper part of the pipe and with variable wetting of the pipe), typical for downhole equipment and field gas pipelines, was studied. The applied approach makes it possible to determine (predict) the potential aggressiveness of operational environments in relation to the pipe material and to rank pipe sections according to the degree of local defects development.

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