Research Progress on CO2 Corrosion and Protective Countermeasures for Oil Casing
With the popularization and application of CO2 flooding technology in oilfields,the CO2 cor-rosion and corrosion-control becomes an urgent problem to be solved.CO2 corrosion can easily cause the damage and failure of oil casing,and it is of great economic value and scientific significance to study the relevant corrosion mechanism and anti-corrosion measures.In this paper,the CO2 corrosion mecha-nism is introduced,and the influence of temperature,medium flow rate,pH and other factors on the CO2corrosion rate is analyzed.By taking the actual operation conditions of oilfield exploitation and the in-fluencing factors of CO2 corrosion into consideration,the research progress of corrosion-resistant materi-als,corrosion inhibitors,metal plating and other measures are reviewed,and the advantages and disad-vantages of these measures in the actual oilfield application are summarized.Among many measures,the amorphous alloy coating is prone to be passivated passivated in operating conditions of oilfields,which may act as an effectively barrier to protect the pipe steel substrate from corrosion attack by corro-sive media,thereby enhance the service life of the pipeline.The result of comprehensive analysis shows that the anti-corrosion measures of metal coating have good economic benefits and application pros-pects,and the future research on anti-corrosion technology of metal coating is prospected.
CO2 corrosionoil casingantiseptic measuresmetal plating
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