CO₂ Corrosion in Oil and Gas Exploration and Production Environments

Abstract

It is important to study the CO₂ corrosion behavior in CCS operation which applies the CO₂ injection. In Oil and Gas exploration and production environments, reservoirs may contain acid gases such as CO₂, and the corrosion environments would become harsh for OCTG and linepipe. In this paper, the research work on CO₂ corrosion and its countermeasure is reviewed. CO₂ corrosion can be characterized by its relatively high corrosion rate and localized corrosion (ringworm corrosion). It is also recognized that the corrosion behavior depends on the environmental factors such as partial pressure of CO₂ and temperature, and also the effect of flow velocity is remarkable. The addition of Cr as an alloying element is effective to mitigate the CO₂ corrosion, therefore, stainless steels such as Super 13Cr have been widely applied, as OCTG and linpipe.