Influence of the Oxygen Content, Pressure and Temperature in the Api N-80 Corrosion for Applications of Ccs-eor Processes

Abstract

Enhanced oil recovery in processes involving the presence of carbon dioxide (CO₂) is the option with the greatest potential for carbon capture and storage (CCS-EOR). The content of molecular oxygen in the flue gas current generates problems and risks associated with corrosion that must be evaluated. Similarly, the analysis of the effects of temperature and working pressure, represent two variables of great interest. In this research, the effects of the variables oxygen removal efficiency, temperature, and pressure, in real conditions of an oil field in Colombia, were evaluated by means of a thermodynamic simulation tool. The presence of the following corrosion products Fe₂O₃, Fe₃O₄, MnCO₃, MnO₂, and FeCO₃ was determined. It was observed that the presence of FeCO₃ and MnCO₃ corrosion products occur only for removal efficiencies equal to or greater than 95%. Temperature has a greater influence on the products formed in equilibrium (Fe₂O₃, Fe₃O₄, MnCO₃) at a constant pressure, whereas pressure has a greater influence on MnO₂ and FeCO₃ at a constant temperature.