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以丙烯酰胺(AM)为主要单体,丙烯酸(AA)和2-丙烯酰胺-2-甲基丙磺酸(AMPS)为功能性单体,采用反相微乳液聚合法合成了1种纳微米级丙烯酰胺微球调剖剂(PAMAS)。利用激光粒径分析仪考察了PAMAS吸水溶胀后粒径变化,通过吸水膨胀倍数表征了PAMAS的耐温性、耐盐性,通过流变分析仪表征了PAMAS的注入性,采用封堵实验研究了PAMAS的封堵特性。结果表明,随着溶胀时间的增加,PAMAS微球的粒径从0.733μm膨胀至3.291μm;在60℃下,PAMAS的吸水膨胀倍数增至2.5倍;随着剪切速率的增加,PAMAS乳液表现出剪切变稀的特性。室内封堵实验表明,其运移性良好,采收率提高至78.62%。
Using acrylamide (AM) as the main monomer, acrylic acid (AA) and 2-acrylamide-2-methylpropanesulfonic acid (AMPS) as functional monomers, Acrylamide Microspheres Profile Control (PAMAS). The particle size changes of PAMAS after water absorption and swelling were investigated by laser particle size analyzer. The temperature tolerance and salt tolerance of PAMAS were characterized by water absorption expansion coefficient. The injection properties of PAMAS were characterized by rheological analysis. PAMAS blocking characteristics. The results showed that with the increase of swelling time, the particle size of PAMAS microspheres expanded from 0.733μm to 3.291μm. At 60 ℃, the swelling ratio of PAMAS increased to 2.5 times. With the increase of shear rate, PAMAS emulsion showed Cut thinning characteristics. Laboratory plugging experiments show that the migration is good, the recovery rate increased to 78.62%.