Research Progress on Corrosion Behavior and Corrosion Protection Under CO2-O2-H2O Environment
In the process of air injection gas drive oil recovery,acidic gases and corrosive ions usually exist in the extraction fluid,and the changes in the concentration of these gases and ions affect the corrosion behavior of oil casing under the effect of temperature and pressure,resulting in different degrees of corrosion and loss.This paper discusses the corrosion behavior of oil casing under CO2-O2-H2O environment from the aspects of corrosion mechanism,influencing factors and anticorrosion measures,and briefly introduces the corrosion law and main influencing factors under different factors,including temperature,gas partial pressure and corrosive medium.Two common anticorrosion means are analyzed and evaluated,including the selection of corrosion-resistant materials and surface plating protection technology,to provide theoretical basis for the subsequent anti-corrosion of oil casing.
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