POLYMER INTERAQUIFER FLOW PLUGGING TECHNOLOGY OF FEIYANTAN OILFIELD

Aimed to the problems of earlier interaquifer flow appearance when polymer is injected in Feiyantan Oilfield, the paper brings forward to the interaquifer flow plugging method by activated cationic polymer. The test has been finished by activated cation, anion and inorganic salt with high valence, using Feiyantan core in this polymer injection block. The test shows that activated cationic polymer has the good surfactivity, and promotes the effects of flooding. Activated cationic polymer is compounded with low concentrated anionic polymer to plugging agent, which has long heating stabilization, high plugging efficiency and good water flooding endurance. By the analysis of site application in six wells, it has the great effects to increase oil production and decrease water, and decrease the polymer reproduction. This technology is an effective method with a potent application.