Experimental Research on Material Selection of High-temperature and High-salt Environmental Oil Casing in Western Oil Field

An oil and gas field in the west has the characteristics of ultra-deep, high temperature, high salt, etc., the corrosive environment is very harsh, and the risk of weightless corrosion is extremely high. The commonly used anti-sulfur carbon steel and stainless steel and other material oil bushings lack the experience of testing and field use in this condition.The corrosion behavior of P110S, S13Cr, 15Cr and 25Cr under the conditions of the oil and gas field is researched. The results show that in the high-temperature and high-salt working conditions of the oil field, the corrosion resistance of P110S sulfur-resistant carbon steel is extremely serious, which can not meet the field use; S13Cr and 15Cr martensitic stainless steel have slight corrosion, which can meet the field use.