Water shutoff system XN-PP developed is a in-situ copolymerization system polymerized from acrylamide, low-grade aldehyde and some addition a-gents.Chemical mechanism of XN-PP is analysed.

• 根据油田地层特征及调制堵水技术对调剖堵水材料的要求,研制了以丙烯酰胺和低级醛为主剂的就地共聚合交联体系XN-PP。