Development and Implementation of a new Mechanistic Corrosion Model for Oil and Gas Production

As part of an internal Research and Development effort, the company’s recommended CO₂ corrosion model has been updated. The model is being updated from the semi-empirical models of de Waard et al. to a more mechanistic approach, which models each of the cathodic and anodic reactions within a common framework based on the developments of Gray, Nesic, and Nordsveen et al. Establishing a consistent internal framework allows the corrosion model to be expanded beyond the effects of just CO₂ (H₂CO₃ and H⁺ reduction) to include the effects of acetic acid (HAc) and O₂. All these effects are treated consistently within the water chemistry, flow and electrochemistry modules. Also, recommendations are made in terms of corrosion inhibition limits.