聚驱后油层中残留着大量聚合物.为了进一步提高采收率,选择了一种阳离子聚合物絮凝剂.絮凝剂在水溶液中溶胀,形成具有一定黏弹性的微米级颗粒,对岩心的封堵率大于97％；溶入水的部分能够絮凝地层残留的聚合物,起到驱油的效果,提高原油采收率10％以上.%A large number of polymer left in the oil layer after polymer flooding. In order to further enhance oil recovery, a special cationic polymer flocculant was selected. Flocculants can swell in the water and form some micron particles which had certain viscoelasticity. The core plugging rate is more than 97%. The flocculant which dissolved in the water can flocculate the residual polymer in the layer and had the flooding effect. It can enhanced oil recovery more than 10%.
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