1results about How to "Adjust solubility" patented technology

This invention provides a carbon dioxide heavy oil extraction aid, its preparation method, and its application. The carbon dioxide heavy oil extraction aid, based on 1 part by weight of alkyl polyoxypropylene polyoxyethylene ester, further comprises the following components: 0.1-10 parts by weight of alkylamine; 0.1-100 parts by weight of solvent; the general molecular formula of the alkyl polyoxypropylene polyoxyethylene ester is formula (I) or formula (II): In formula (I), R1 is a C1-C8 alkyl group; R2 is a C1-C8 alkyl group; a is an integer from 0 to 12; b is an integer from 1 to 12; In formula (II), R3 is a C1-C8 alkyl group; R4 is a C1-C8 alkyl group; c is an integer from 0 to 12; d is an integer from 1 to 12. The carbon dioxide heavy oil extraction aid prepared by this invention enhances the interaction between CO2 and heavy oil, improves the swelling effect of CO2 on heavy oil, and increases the mobilization capacity of heavy components, thereby reducing the precipitation of asphaltene and other substances, ultimately effectively improving oil recovery efficiency.