Evaluation of a New Sour Gas Corrosion Inhibitor for Field Applications via Localized Corrosion Monitoring Techniques

摘要

A new corrosion inhibitor was developed for application in sour gas and oil production. During the development process, controlling pitting corrosion in laboratory testing was important for quantifying inhibitor performance. This criterion was set because pitting or localized corrosion is the most significant internal corrosion threat in sour gas production. Evaluation of the corrosion inhibitor in the laboratory testing used vertical scanning interferometry (VSI) to image the exposed coupons and localized corrosion monitoring to quantify localized corrosion. At the end of the development stage a field trial was set up in an oilfield with production consistent with the conditions the inhibitor was exposed to in laboratory testing.