The results of plugging test showed that water shutoff agent HY had good plugging efficiency for different permeability core,plugging rate was more than 99.90%,and the core break- through pressure grade was higher than 18.0 MPa.

• 聚合物堵水剂HY的封堵试验结果表明；堵水剂HY对不同渗透率的岩芯均具有很好的封堵效果；封堵率大于99.；90%25；突破压力梯度大于18