Patent 11939521 was granted and assigned to SAUDI ARABIAN OIL COMPANY on March, 2024 by the United States Patent and Trademark Office.
A solution for injection to a formation containing hydrocarbons includes an ionic liquid and a brine having a salinity of at least 60,000 ppm total dissolved solids (TDS). The ionic liquid is configured to lower an interfacial tension between the solution and the hydrocarbons in the formation.