The Research Of The Compound Of The Ionic Liquids 1-butyl-3-mehtylimidazole Tetra Fluoroborate And Surfactant

In the tertiary oil recovery,different kinds of surfactant are compound to be used for the purpose of improving the oil recovery,while when the ionic liquid compound with the surfactant,the system can play a good ability to enhance the oil recovery.This paper mainly respectively compound the 1-butyl-3-methylimidazole tetra fluoroborate ionic liquids with dodecyl benzene sulfonic acid sodium and sodium dodecyl diphenyl ether disulfonic acid,study the ability of the system to improve recovery factor.The specific experimental scheme is as follows:Different concentrations of ionic liquids respectively compound different concentrations of common anionic surfactants and novel anionic surfactants,testing the surface tension and interfacial tension of different compounding system,and screening the optimal compounding system of SDBS 0.10%[Bmim][BF₄]+0.053%SDBS and the optimal compounding system of C₁₂-MADS 0.066%[Bmim][BF₄]+0.053%C₁₂-MADS reducing the interfacial tension between the aqueous solution of the compounding system and the crude oil to 0.11mN/m and 0.079mN/m respectively,and then explore the temperature and salt tolerance of the optimal compounding system.It is concluded that the interfacial of the two system reduces respectively in0.11mN/m and 0.079mN/m.And the interfacial tension of the SDBS system continues to increase with the temperature increasing,while the C₁₂-MADS compound system stabilizes the interfacial tension in the 50?temperature range,when the temperature grow more than 50?,the interfacial tension of the system continues to increase with the temperature increasing.The SDBS system has good salt tolerance,while the interfacial tension of C₁₂-MADS system increase with the increase of salt concentration.