Development of a New Water Soluble High Temperature Corrosion Inhibitor

As oil and gas becomes more difficult to find, wells become deeper. The temperatures of deep wells can be as high as 230°C. There are a limited set of oil soluble corrosion inhibitors that work well in such systems. In this paper we report the development of a new water soluble corrosion inhibitor that works at high temperature and can be injected using a capillary string in these systems. A water soluble corrosion inhibitor has many advantages such as high flash point and higher reportable quantities (RQ) if a spill occurs. Using a water soluble inhibitor also ensures that corrosion inhibitor is found in the water phase where corrosion occurs. In this paper the laboratory studies on a new high temperature water soluble corrosion inhibitor are reported. The performance of this corrosion inhibitor in a field trial will also be reported. Wherever possible the water soluble corrosion inhibitor will be compared with a high temperature oil soluble corrosion inhibitor.