纳微米聚合物微球的水化膨胀封堵性能  

Hydration expansion and plugging properties of nano/micron-sized polymer particles in porous media

作　　者：李娟[1] 朱维耀[1] 龙运前[1] 兰喜艳[2] 杨智慧[2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]华北油田勘探开发研究院,河北任丘062552

出　　处：《大庆石油学院学报》2012年第3期52-57,8,共6页Journal of Daqing Petroleum Institute

基　　金：国家自然科学基金项目(50934003)

摘　　要：为改善聚合物微球的深度调剖效果,利用蒸馏沉淀聚合法制备纳微米聚合物微球,并利用激光粒度分析仪、微孔滤膜装置和驱替装置对纳微米聚合物微球的粒径、水化膨胀能力和变形封堵能力进行测试分析.结果表明:纳微米聚合物微球为较规则均匀的球形,粒径分布集中,具有良好的水化膨胀性能;随着盐矿化度增大,纳微米聚合物微球膨胀性能变差;随着温度升高,微球的膨胀性能变强;在氯化钙和氯化镁水型中,微球膨胀性能变差;在酸性和碱性环境中,微球膨胀性能变差;随着水化时间增长,微球的封堵性能和变形能力逐渐增强,对孔道产生有效封堵的同时又能变形通过孔道,在渗透率较低的岩心中具有更好的深度调剖效果.In order to improve depth profile effect of polymer microspheres,nano/micron-sized polymerparticles were prepared by distillation precipitation polymerization method.Then,particle size,hydration swelling and plugging properties of nano/micron-sized polymer particles were determined and analyzed by the laser particle size analyzer,microporous membrane filter devices and flooding devices.The results show that nano/micron-sized polymer particles are regular and uniform spheres and have good hydration expansion performance.The expansion property of nano/micron-sized polymer particles decreased when the salt concentration increased.As the temperature increased,the expansion property of nano/micron-sized polymer particles increased.The expansion property of nano/micron-sized polymer particles was degraded in calcium chloride and magnesium chloride solution as well as acid and alkaline environment.With the growth of the hydration time,the plugging and deformation properties of nano/micron-sized polymer particles were strengthened gradually.The nano/micron-sized polymer particles could plug the pore channel,and at the same time pass through the pore channel by deformation.The nano/micron-sized polymer particles have better depth profile effect in lower permeability cores.

关 键 词：纳微米聚合物微球 水化膨胀 过滤 封堵 变形 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]