IMPROVED PROCESS FOR ENHANCED OIL RECOVERY

摘要

Process for enhanced oil recovery consisting in introducing into the injection water a solution containing at least one polymer and at least one surfactant, the surfactant/polymer weight ratio being between 1 and 10 and the concentration of surfactant in the solution being greater than 100 ppm (parts per million), characterized in that said polymer contains at least one hydrophobic cationic monomer.