【摘要】 采用丙烯酸、丙烯酰胺在水溶液中二元共聚,并以钠基膨润土为无机添加剂,合成了抗温、抗盐性的预交联凝胶。最佳工艺条件如下:反应温度为40°C,反应时间为1h,交联剂质量分数为0.07%,引发剂质量分数为0.1%,丙烯酰胺与丙烯酸的质量比为11∶2,丙烯酸中和度为80%,膨润土质量分数为7%。预交联凝胶在去离子水中的膨胀率达76g/g,可抗温110°C,抗盐达150g/L,在原油中浸泡15d的收缩率为86%,堵水率大于90%,堵油率小于7%。该预交联凝胶具有良好的封堵选择性和调剖效果,可作为高温、高盐油水井的深部堵水调剖剂。更多还原

【Abstract】 A novel water-swellable polymer,combining both organic and inorganic system, was synthesized by water solution copolymerization using acryl amide and acrylic acid as raw materials,and Na +-montmorillonite as inorganic filler.Optimum conditions were: bath temperature 40 °C ,reaction time 1 h, mass ratio of acryl amide/acrylic acid 11∶2, amount of montmorillonite 7%, amount of cross-linking agent 0.07%, neutralization degree of acrylic acid 80%, amount of initiator 0.1%. The swellability in pure water was up to 76 g/g, temperature-resistance 110 °C , anti-salt 150 g/L, shrinkage in crude oil 86%(15 days),water-plugging effect was more than 90%, and oil-plugging effect was less than 7%. It could be used for selective in-depth water-plugging and profile-modification in oil and water wells with high temperature and high salt.更多还原