Theory research on EOR method of high concentration polymer flooding

High concentration polymer drive is a further enhanced oil recovery method after conventional polymer flooding.Its economic value depends on well pattern and well spacing. In this article, we evaluate oil displacement efficiency of highconcentration polymer at different well pattern, well spacing, injection rate and concentration by fine numerical simulation inPu-1 oil group of Daqing oilfield. Research shows that the development plan of nine point well pattern, dense well spacing,high concentration and high injection rate can achieve best development effect. This provides a basis for carrying out field highconcentration polymer flooding.