聚驱后残余聚合物絮凝剂的性能评价

The Performance Evaluation of Residual Polymer Flocculant after Polymer Flooding

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%.