Abstract: Lvda 10-1 Oilfield is located in central Liaodong Bay of Bohai Sea, and is a reservoir of high temperature, high salinity and loose cementation. Based on the practical requirement of offshore oilfield development, according to the geological characteristics and fluid property, through indoor physical simulation, the polymer flooding and polymer gel flooding in early stage are studied. The results show that the chemical flooding in early stage can not only shorten the oilfield development time, save operating cost, but also has a higher recovery efficiency than that of middle-late stage. The research results also indicate that, in the condition of the same chemical cost, the productive effect of the polymer gel flooding is better than that of polymer flooding.