Page 200 - 《精细化工》2023年第1期

第 40 卷第 1 期 精 细 化 工 Vol.40, No.1
20 23 年 1 月 FINE CHEMICALS Jan. 2023

油田化学品与油品添加剂
干水法制备核壳聚合物微球及其性能评价

3
1
1
1
严 涵 1,2 ，于小荣 1,2* ，吉仁静 ，盛 哲 ，杨 欢 ，苏高申
（1. 长江大学 化学与环境工程学院，湖北 荆州 434023；2. 油气藏地质及开发工程国家重点实验室，
四川 成都 610500；3. 长庆油田分公司技术监测中心，陕西 西安 710000）

摘要：以丙烯酰胺、2-丙烯酰胺基-2-甲基丙磺酸为单体，N,N'-亚甲基双丙烯酰胺为交联剂，过硫酸铵和亚硫酸
氢钠为引发剂，水为溶剂，疏水 SiO 2 为壳层原料，采用干水法制备干水微反应器，将其干燥后即得核壳聚合物
微球（PMS@SiO 2 ）。考察了 SiO 2 疏水性、疏水 SiO 2 与水相质量比、搅拌速度和搅拌时间对形成稳定干水微反
应器的影响，通过正交实验对 PMS@SiO 2 的制备条件进行了优化。采用 FTIR、TGA、激光粒度仪、SEM 和 TEM
对样品进行了表征，评价了 PMS@SiO 2 吸水膨胀性能和调驱性能。结果表明，PMS@SiO 2 的最佳制备条件为
m(SiO 2 -R812S)∶m(水相)=1∶10，搅拌速度 12000 r/min，搅拌时间 120 s，交联剂用量 0.10%（以单体总质量为

基准，下同），引发剂用量 0.15%，反应温度 50 ℃，反应时间 4 h。与常规聚合物微球 PMS 相比，PMS@SiO 2
在 90 ℃环境中水化 20 d，膨胀倍数约为 5.0，具有缓膨特性；PMS@SiO 2 的封堵率达 90.39%，残余阻力系数为
10.409，采收率增幅可达 34.02%。
关键词：干水法；核壳聚合物微球；调驱；提高采收率；微反应器；油田化学品
中图分类号：TE39 文献标识码：A 文章编号：1003-5214 (2023) 01-0192-08

Preparation and properties of core-shell polymer microspheres
prepared by dry water method

3
1
1
1,2
1
YAN Han , YU Xiaorong 1,2* , JI Renjing , SHENG Zhe , YANG Huan , SU Gaoshen
（1. College of Chemical and Environmental Engineering, Yangtze University, Jingzhou 434023, Hubei, China; 2. State
Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu 610500, Sichuan, China; 3. Technical
Monitoring Center of Changqing Oilfield Company, Xi'an 710000, Shaanxi, China）
Abstract: Core-shell polymer microspheres (PMS@SiO 2) were obtained after drying of the dry water
microreactor, which was prepared by dry water method with acrylamide, 2-acrylylamine-2-methylpropanesulfonic
acid as monomers, N,N'-methylene bisacrylamide as crosslinking agent, ammonium persulfate and sodium
bisulfite as initiator, water as solvent and hydrophobic SiO 2 as shell raw material. The effects of SiO 2
hydrophobicity, mass ratio of hydrophobic SiO 2 and water phase, stirring speed and stirring time on dry
water microreactor were investigated, and the polymerization conditions of PMS@SiO 2 were optimized by
orthogonal experiment. The PMS@SiO 2 samples obtained were characterized by FTIR, TGA, laser particle size
analyzer, SEM and TEM, followed by evaluation on their water absorption expansion properties and profile
control and displacement performance. The results showed that the optimum preparation conditions of
PMS@SiO 2 were as follows: m(SiO 2 -R812S)∶m(water phase)=1∶10, stirring speed of 12000 r/min, stirring
time of 120 s, crosslinking agent dosage of 0.10% (based on the total mass of monomers, the same below),
initiators dosage of 0.15%, reaction temperature of 50 ℃ and reaction time of 4 h. In comparison to
conventional polymer microspheres PMS, the PMS@SiO 2, when hydrated at 90 ℃ for 20 d, exhibited an
expansion ratio of ~5.0 showing characteristics of slower expansion. Meanwhile, PMS@SiO 2 displayed a
plugging ratio of 90.39%, residual resistance coefficient of 10.409, and the recovery rate increased by 34.02%.

收稿日期：2022-03-30; 定用日期：2022-07-08; DOI: 10.13550/j.jxhg.20220295
基金项目：油气藏地质及开发工程国家重点实验室开放基金（PLN2021-13）
作者简介：严 涵（1997—），女，硕士生，E-mail：2763198629@qq.com。联系人：于小荣（1988—），女，讲师，E-mail：yxr_cjdx@
163.com。