Experimental Study on Corrosion Mechanism in Guangli Oilfield

摘要

Casing corrosion is serious and the injection efficiency is considerably low due to high injecting water corrosion in Guangli oilfield. Casing corrosion mechanism is retrieved through SEM observation, energy spectrum analysis, XRD analysis spectrum, TGA analysis of corrosion fouling. The results show casing corrosion mechanism varies with depths; casing corrosion is the result of the combined action of carbon dioxide, dissolved oxygen, sulfate-reducing bacteria and high salinity. To extend the life of casing, appropriate casing protection measures should be adopted, which can reduces the cost of production of the oilfield.