Study the Effect of Polymer Concentration on Oil Recovery in Sand Pack

In recent years, utilizing EOR methods in order to increase oil recovery from reservoirs is of great importance. One of these methods is polymer injection which may be even used separately for EOR or with other EOR methods to control injection profile. In this paper, injection of low concentration polyacrylamide in concentrations of 100, 300 and 500 ppm studied. In all cases, test temperature was 60C and the polymer solution was prepared using distilled water. Polymer injected after water flooding as tertiary recovery when water cut reaches 80%. A polymer slug of 0.3 PV injected in the sandpack and then injection of water is resumed till no more oil recovered.. Results shows that incremental recovery is 15 to 26% more than waterflooding.