Hazard Assessment of the Internal Carbon Dioxide Corrosion of the Field Pipelines at the Gas and Gas Condensate Fields


At many gas and gas condensate fields in operation, carbon dioxide (СО2) is present in the scope of the produced products, which, in combination with the natural and technological factors, stimulates intensive development of the internal corrosion processes in the pipelines and equipment. The relevance of the development of native regulatory documentation aimed at the assessment of the corrosion effects and development of the practical recommendations for protection against carbon dioxide corrosion in the last decade is due to the development of new gas fields in Russia with a high CO2 content (including on the Russian offshore), where there is a risk of local corrosion development with a high flow rate. The presence of CO2 in the produced gas in combination with the moisture and other factors stimulates the intensive development of corrosion processes and requires careful attention to the assessment of the corrosion aggressiveness of operating environments for selecting an efficient anti-corrosion protection. This is required to ensure reliable and safe operation of the equipment and pipelines made of carbon steel. Pipe low-alloy steel of 09G2S (09Mn2Si) grade, which is the most widely used at the domestic gas facilities, is not resistant to carbon dioxide corrosion. The experience of operating foreign deposits under conditions of carbon dioxide corrosion confirms the need and efficiency of considering this corrosion aspect at the facilities design stage.
Incorrect assessment and underestimation of CO2 hazard in the produced hydrocarbons in relation to steel equipment and pipelines can lead to unaccounted corrosion risks (up to the facility shutdown), significant costs for the elimination of corrosion consequences (repairs, etc.), and the need to select and justify urgent corrective measures. Accounting the Russian and international experience allows to make a reasonable choice of rational technical solutions for efficient and safe operation of the deposits in conditions of carbon dioxide corrosion.

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DOI: 10.24000/0409-2961-2021-2-56-62
Year: 2021
Issue num: February
Keywords : field pipeline скорость коррозии gas fields carbon dioxide corrosion corrosion allowance local corrosion corrosion monitoring
  • Kantyukov R.R.
    Kantyukov R.R.
    Cand. Sci. (Eng.), Deputy General Director «Gazprom VNIIGAZ» LLC, Moscow, Russia
  • Zapevalov D.N.
    Zapevalov D.N.
    Cand. Sci. (Eng.), Head of Corporative Center Gazprom VNIIGAZ LLC, Razvilka, Russia
  • Vagapov R.K.
    Vagapov R.K.
    Cand. Sci. (Chem.), Head of the Laboratory, R_Vagapov@vniigaz.gazprom.ru Gazprom VNIIGAZ LLC, Razvilka, Russia