Fe3O4@SiO2P(MA-AM)复合微球调剖剂的制备及性能选读.docx

Fe3O4@SiO2/P(MA-AM)复合微球调剖剂的制备及性能研究李谦定，王甜甜*，孟祖超，马士越（西安石油大学化学化工学院，陕西 西安710065）摘要：采用共沉淀法制得纳米Fe3O4粒子，SiO2包覆处理后用KH-570对其进行表面改性，后采用分散聚合法制得Fe3O4@SiO2/P(MA-AM)聚合物复合微球。通过红外光谱、电镜扫描、激光粒度分析等手段对微球的Fe3O4@SiO2内核和P(MA-AM)聚合物外壳的复合结构进行了表征。通过对聚合物复合微球溶胀性能、封堵性能的试验表明，该微球具有良好的吸水膨胀性、耐温抗盐性以及一定的封堵运移能力，可以用于注水井的深度调剖；同时，在用于注水井调剖驱油剂使用时，若被挤入油层随采出液携带出时，也可采用磁性分离处理，是具有应用潜力的磁性调剖堵水剂。关键词：聚合物复合微球；分散聚合法；扫描电镜；调剖堵水；磁性分离中图分类号：TE357文献标志码：AStudies on synthesis and properties of Fe3O4@SiO2/P(MA-AM) polymer microspheres as profile-control agentLI Qian-Ding，WANG Tian-Tian*，MENG Zu-Chao，MA Shi-Yue(College of Chemistry and Chemical Engineering，Xi’an Shiyou University，Xi’an 710065，China)Abstract：Fe3O4nanopaticles were synthesized using coprecipitation method, the surface modification of Fe3O4particles had been done by KH-570 after coated SiO2processing, Fe3O4@SiO2/P(MA-AM) polymer composite microsphere was synthesized using dispersion polymerization.the complex structures of Fe3O4@SiO2 (kernel) and P(MA-AM) (polymer shell) were characterized by infraced spectra, Scanning electron microscopy, laser size analysis.The research of swelling capacity and sealing ability Show that the title polymer composite microsphere with certain molecular references is well with water swelling、plugging ability、salt and temperature resistance. it can be used for depth profile control in water injector; Besides, itcan used by magnetic separation process when be carried out with produced liquid,Fe3O4@SiO2/P(MA-AM) polymer composite microsphere has a potential application as Magneticwater-plugging agent.Key words：polymer composite microspheres；dispersionpolymerization; SEM;profilecontrol water plugging;magneticseparation目前我国大多油田都进入高含水开发期，油层出水最终会降低油田开采率。油井出水后，确定出水层位，然后采用堵水方法进行封堵。堵水的目的就是控制产水层中水的流动和改变水驱油中水的流动方向，提高水驱油效率，使得油田的产水量在一段时间内下降或稳定，以保持油田增产或稳产，提高油田最终采收率[1-6]。国内外常用的调剖堵水剂有无机粒子堵水剂、弱凝胶深部堵剂、胶态分散凝胶堵剂、预交联体膨型颗粒堵剂以及聚合物微球调剖堵水剂等[7]，这些调剖堵水剂都各自存在一些缺陷，调剖堵水效果不理想。无机堵剂堵水强度高，能封堵高渗透层带，但封堵太死，不能移动，容易绕流并且有限期短，使重复调驱工作变的困难，不利于深度调剖；有机调剖堵水剂优点在于堵而不死，能够运移，可以实现深度调