This paper presents the outcome of a comprehensive program of work to establish the suitability and performance of candidate inhibitor packages for downhole production applications. It covers both CO2 and H2S corrosion performance of carbon and low alloy steel tubulars in simulated field conditions. Inhibitor performance was established through using a number of inhibitor selection methods by systematic determination of efficiency, persistency and chemical compatibility of both conosion and combined corrosion/scale inhibitor packages. The results have led to determination of effective means of corrosion mitigation to enable wider uses of carbon and low alloy steels for downhole applications.
Keywords: carbon steel, low alloy steel, inhibitors, sour environment.