1 research outputs found
Corrosion Inhibitors for Sour Oilfield Environment (H2S Corrosion)
Lower-grade steel materials are the most commonly used construction materials for oil and gas wells
due to their low cost and high performance. However, they are susceptible to corrosion when they
come in contact with corrosive environments that are highly acidic. In oil wells, particularly deep oil
wells, hydrogen sulfide (H2S) is commonly found. The dissolution of H2S gas in produced water
makes the fluid corrosive. The use of corrosion inhibitors is perhaps the most practical and costeffective
means of controlling corrosion of low carbon steels in the sour environment. In this chapter,
typical corrosion inhibitors used in oil and gas fields to control the internal corrosion of oilfield
equipment caused by H2S are being examined. The inhibitors found to be effective are polar
functional compounds, with many being based on nitrogen-containing compounds, such as amines,
imidazolines, and quaternary ammonium salts. Drawbacks of these compounds in practical
applications and potentials of future developments are discussed