摘要
本文通过聚合物粘性及弹性变化规律对聚合物的"高浓度"界限值进行了表征。并针对喇嘛甸油田高浓度聚合物驱良好的增产效果,对高浓度聚合物体系提高原油采收率机理进行了分析,为喇嘛甸油田高浓度聚合物驱大规模矿场试验提供理论支持。研究结果表明:2500万分子量聚合物浓度达到3000mg/L时,粘弹性增幅最大。与常规聚驱相比,高浓度聚合物粘度有较大幅度增加扩大波及体积能力更强,弹性效果更好洗油能力效果更好。
The field test of high-concentration displacement is implemented in Lamadian Oilfield North West Block.The value of enhanced oil recovery in the central area is up to 20percent or more.In order to explore the reason of good stimulation effect of high concentration polymer flooding in Lamadian Oilfield,the mechanism of high concentration polymer systems for EOR is conducted in this paper.The high concentration is characterized by the viscosity and elasticity of polymer in this article.The results showed that:the concentration of polymer with 25million molecular weight reach to 3000mg/L,the increases value of viscoelasticity is the largest.So high-concentration polymer is defined as 3000mg/L. Compared with conventional polymer flooding,high concentration polymer has a greater ability to expand swept volume and effectiveness of wash oil.
出处
《内蒙古石油化工》
CAS
2014年第7期136-138,共3页
Inner Mongolia Petrochemical Industry
关键词
高浓度聚合物
粘弹性
采出程度
High-concentration polymer
Viscoelasticity
Recovery
