DOI: 10.21276/sjet

Pages: 226-231

The type Ⅱ oil layers（it is also named thin and poor layers） in Block X is now in the later stage of high water cut with an average water content of 91.7%. In order to reduce the decline of production and improve the development effect of oil field, it is preliminary planned to exploit the potential of polymer flooding in X block after 10 years of water flooding development. The influence of the concentration of polymer solution and the amount of polymer on oil displacement was studied by numerical simulation. The results showed that the optimum concentration of polymer solution was 1200mg / L, and the optimum polymer content was 1200mg / L.PV.