交联比对交联聚合物微球性能的影响

Influence of Microsphere-Crosslinked Ratio on the Performance of Cross Linked Polymer Microsphere

关键词:  交联聚合物微球  粒径  溶胀  交联比  变形性

Key words:  crosslinked polymer microsphere  size  swelling  crosslinked ratio  deformability

摘要:

采用动态光散射实验、扫描电镜实验、核孔膜过滤实验和岩心实验研究了交联比对交联聚合物微球性能的影响。实验结果表明,交联比不同,微球溶胀后的水化粒径不同;交联比越小,微球结构越松散,微球的溶胀倍数越大;随着交联比的减小,微球的柔软程度增加,变形性增强;核孔膜实验表明,粒径适中、变形性较好的微球封堵能力强;岩心驱油实验进一步表明变形性较好的微球更容易进入油藏深部进行封堵。现场试验表明,该体系微球能够有效增油降水,能够改善地层的非均质性。

Abstract:

Influence of microsphere-crosslinked ratio on the performance of crosslinked polymer microsphere was studied by dynamic light scattering experiments,scanning electron microscopy experiments,nuclear pore membrane filtrating experiments and core flooding experiments.The experimental results show that swelling microspheres sizes are different because of different hydration crosslinked ratio;the smaller the crosslinked ratio becomes,the looser microspheres structure is,the larger swelling multiple is.With the decrease of crosslinked ratio,the soft degree of microsphere increased,and the deformability of microsphere enhanced.The nuclear pore membrane filtrating experimental results show that the microspheres with moderate size and better deformability have better blocking ability.The core flooding experiments results further show that the microsphere with better deformability can easier access to the deep reservoir and occur closure.The field application test shows that the polymer microsphere system can increase oil production and reduce water.