七区中注聚驱2005年5月转入后续水驱,按方案预测及与其它注聚单元对比该单元应该进入含水缓慢回返阶段。但2009年依然递减较大,与2008年12月对比日产油下降84.2吨,综合含水上升0.8%,2009年总递减高达13.7%,含水上升率高达1.04%。主要下降原因是注入井层间矛盾大,注入压力高,注入能力差。 Seven areas in the injection of polymer flooding in May 2005 into the follow-up water drive, according to the program to predict and compare with other injection unit should enter the water slowly return stage. However, the decline in 2009 is still large. Compared with December 2008, the daily output of crude oil decreased by 84.2 tons, the comprehensive water content increased by 0.8%, and the total decline in 2009 was as high as 13.7%. The water cut-off rate was as high as 1.04%. The main reason for the drop is the large conflict between injection wells, high injection pressure and poor injection ability.