Aggressive environmental factors causing corrosion at gas production facilities in the presence of carbon dioxide
https://doi.org/10.31615/j.corros.prot.2020.98.4-1
Abstract
The current stage in the development of promising gas and gas condensate fields in the Russian Federation is associated with facilities whose production includes carbon dioxide. Such objects include the Urengoyskoye oil and gas condensate field (Achimov deposits), the Bovanenkovskoye oil and gas condensate field, and the Kirinskoye gas and condensate field. The presence of CO2 in the produced gas, in combination with moisture condensation and a number of other factors, stimulates the intensive development of local corrosion processes. The main factors that influence the development of corrosion at infrastructure facilities and its localization in the presence of CO2 are considered. It is noted that when assessing the degree of aggressiveness of the environment, it is necessary to consider not only the CO2 content, but also other basic operating parameters that can affect corrosion. During the exploitation of gas fields, the conditions of moisture condensation that contribute to corrosion arise, which occurs when a temperature gradient arises and the produced gas is rapidly cooled. Higher temperatures increase both the amount of precipitated moisture and, accordingly, the rate of local corrosion. Simulation tests have shown that the development of local forms of corrosion (pitting, ulcers) are possible even at low CO2 partial pressures (from 0,025 MPa and above) in the presence of condensed moisture.
About the Authors
R. K. Vagapov
Gazprom VNIIGAZ LLC
Russian Federation
Russian Federation
Ruslan K. Vagapov, Ph.D. in Chemistry, Head of Laboratory
possession 15, building 1, 5537 Proyektiruyemyy Proyezd, village Razvilka, Razvilkovsky, Leninsky district, Moscow region
D. N. Zapevalov
Gazprom VNIIGAZ LLC
Russian Federation
Russian Federation
Dmitry N. Zapevalov, Ph.D. in Technical Sciences, Head of Corporative Center
possession 15, building 1, 5537 Proyektiruyemyy Proyezd, village Razvilka, Razvilkovsky, Leninsky district, Moscow region
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Review
For citations:
Vagapov R.K., Zapevalov D.N. Aggressive environmental factors causing corrosion at gas production facilities in the presence of carbon dioxide. Theory and Practice of Corrosion Protection. 2020;25(4):7-17. (In Russ.) https://doi.org/10.31615/j.corros.prot.2020.98.4-1
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