OBTAINING AN EMULSIFIER OF INVERSE EMULSIONS WITH A CORROSION INHIBITOR PROPERTIES

Abstract

Reverse emulsions are widely used in oil production processes; moreover, due to a number of unique properties, they are used both in drilling and in killing wells, and for leveling the injectivity profile, as well as in repair and isolation works as a liquid packer. Most industrial emulsifiers belong to the class of fatty acid amides derived from natural and synthetic carboxylic acids and amines (primary and secondary) or amino alcohols. Given that many technological operations, such as killing with concentrated salt solutions (reverse emulsions are used as blocking fluids), treatment of the bottomhole zone with acid compositions (reverse emulsions are used as an acid diverter), are accompanied by intense corrosion of metal equipment and require additional costs for corrosion inhibition, we set ourselves the goal of developing an invert emulsifier with corrosion inhibitor properties. Using rapeseed oil and 2-[(2-aminoethyl)amino]ethanol as the initial compounds of the catalytic reaction under the action of alkali, amidoamine was obtained, which has the properties of an emulsifier of reverse emulsions and a corrosion inhibitor. Synthesis conditions are described and proof of the structure of the resulting compound is given. Its surface-active properties, emulsifying ability, as well as inhibitory activity under conditions of carbon dioxide corrosion were determined.