Volatile corrosion inhibitor containing natural gas with carbon dioxide

Abstract

The invention relates to a volatile corrosion inhibitor containing natural gas with carbon dioxide and mainly solves the problem that carbon dioxide contained in natural gas severely corrodes steel so as to greatly minimize the lifetime of oil and gas well. The volatile corrosion inhibitor comprises the following components of: by weight, 10-20% of N-methyl diethanolamine, 1-3% of Penetrant JFC-2, 3-10% of benzotriazol, 4-15% of 5,7 dinitrogen-8-hydroxyquinoline, and 52-82% of anhydrous ethanol. The content of each component is the weight percent of the gross weight of the corrosion inhibitor. The volatile corrosion inhibitor containing natural gas with carbon dioxide has high inhibition efficiency and will not influence the lifetime of the oil and gas well.

Description

technical field [0001] The invention relates to a corrosion inhibitor used in the field of natural gas industry, in particular to a gas-phase corrosion inhibitor for natural gas containing carbon dioxide. Background technique [0002] At present, in the design of oil and gas wells in oil fields and the design of surface gathering and transportation treatment processes, the material selection is generally ordinary carbon steel, but because ordinary carbon steel does not contain corrosion-resistant alloy elements such as Cr and Mo, in the actual production process of the oil field, the used The electrochemical corrosion of steel is very serious. Carbon dioxide is often a component of natural gas or petroleum-associated gas and exists in oil and gas. CO 2 It is extremely corrosive to steel when dissolved in water. At the same pH value, the total acidity of carbon dioxide is higher than that of hydrochloric acid, and the corrosion of steel is more serious than that of hydroc...

AI Technical Summary

Problems solved by technology

Carbon dioxide corrosion can make oil and gas wells live well below design life