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.