Countermeasures to improve the development effect of classⅡ reserves with high temperature polymer flooding in Shuanghe oilfield

Through research and application of class Ⅱ reserves with polymer flooding in Shuanghe oilfield,according to the purpose to enhance well-pattern controlling degree and change the flow direction,optimize the well-pattern of polymer flooding,block larger reservoir channels by adjusting profile overall before injecting polymer,choose reasonably flooding agent which adapted to this Ⅱ-class reservoir,adopt polymer with different concentration according to different non-homogeneous reservoir,and put forward timely matching technical countermeasures,therefore formed a set of measures to improve the development effect of class Ⅱ reserves with high temperature polymer flooding,which provides a referential evidence for development of class Ⅱ reserves with high temperature polymer flooding. At present,Ⅲ oil group and Ⅳ1-3 oil group of north block in Shuanghe oilfield,the top section of Ⅴ oil group in Jianghe areas have been in the stage of industrial application of high-temperature polymer flooding,and obvious effect of increasing oil and decreasing water production has been achieved.