Research Progress in Application of CO2/O2 Corrosion Inhibitor for Tubing and Casing
Injecting corrosion inhibitor,as a simple,efficient and low-cost anti-corrosion technology,has been a commonly used anti-corro-sion method for oil and casing for many years.However,the working environment of oilfield sites is complex,and different corrosion inhibi-tors have different effects on different materials of tubing and casing under different environmental conditions.This paper summarizes the CO2 and O2 corrosion mechanism of tubing and casing steel used in the service environment,the types and application of CO2/O2 corrosion inhibitor and the corrosion inhibition mechanism.Results show that the corrosion inhibitor acts on the active site through physical adsorption and chemical adsorption.Traditional corrosion inhibitors often cannot fully adapt to the new situation of corrosion in production.Research on corrosion inhibitors tends to develop different types of corrosion inhibitor combinations,and the combination inhibitor has better corrosion in-hibition effects than a single corrosion inhibitor.Finally,the research direction and trend of CO2 and O2 corrosion inhibitors are prospected.
tubing and casingCO2 corrosionO2corrosioncorrosion inhibitorcorrosion inhibition mechanism
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