In order to find the perfect timing for the fracturing of polymer flooding in type Ⅱ reservoir so as to reach the greatest increase in recovery factor, cluster analysis and multi-factor deviation analysis combined with single factor variable are applied, and statistics on fracturing effect of type Ⅱ reservoir is done. The best fracturing timing for different production wells during polymer flooding in type Ⅱ reservoir has been obtained. The result shows that for well-connected and well-developed production wells, the best timing for fracturing is the stable water cut period when the water cut is below 80% ; for well-connected and poor-developed wells, the best timing is the stable water cut period when the water cut is below 85% ; for poor-connected and well-developed wells, the best timing is . When the water cut is below 80% and injection intensity is over 10 m3/ (m ? D) ; for poor-connected and poor-developed wells, the best timing is when the water cut is below 85% and injection intensity is over 10 m3/ ( m ? D).%为准确给出二类油层聚合物驱压裂时机,达到最大幅度提高采收率的目的,采用聚类分析和单因变量多因素方差分析相结合的方法,对二类油层已采取压裂措施的效果进行统计,得出二类油层聚合物驱不同类型采出井的最佳压裂时机.结果表明:连通好发育好的采出井压裂最佳时机为含水小于80％,处在含水稳定期；连通好发育差的采出井压裂最佳时机为含水小于85％,处在含水稳定期；连通差发育好的采出井压裂最佳时机为含水小于80％,注入井注入强度大于10m3/ (m.d);连通差发育差的采出井压裂最佳时机为含水小于85％,注入井注入强度大于10 m3/ (m ·d).
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