Paper: Corrosion Control in a Waterflood by Removal of Hydrogen Sulfide and Carbon Dioxide from the Injection Water by a Hydrocarbon Gas Cycling Process

Equipment handling water containing relatively large quantities of carbon dioxide and hydrogen sulfide is susceptible to excessive corrosion which may attain conditions not economically controllable using corrosion inhibitors. One such extreme condition developed in the Wickett Waterflood in Ward County, Texas where selective injection into multiple zones through common wellbores necessitated annular injection which eliminated the feasibility of using downhole protective coatings. Severe tubing corrosion was observed and continued even after inhibitor treatment had been increased to as much as 72 parts per million. This relatively expensive inhibitor program justified removing the corrosive constituents