超强吸水颗粒型凝胶调驱剂的合成与性能评价

以阴离子单体丙烯酸、阳离子单体季铵盐、非离子单体丙烯酰胺等为主要原料,加入无机共混物、双甲基丙烯酰胺交联剂、过硫酸盐水溶性引发剂,合成了超强吸水颗粒型凝胶调驱剂,确定了最佳配方及合成条件,中和度90%～125%,总单体质量分数30%～50%,以总单体质量为基准,引发剂质量分数0.10%～0.20%、交联剂质量分数0.08%～0.12%、丙烯酰胺质量分数40%～70%、丙烯酸质量分数10%～30%、季铵盐质量分数10%～30%、无机共混物质量分数10%～50%,反应温度50～70℃。对该颗粒型凝胶调驱剂进行了性能评价,结果表明,该产品具有高膨胀性以及较好的延迟膨胀、耐温抗盐、耐冲刷及油水选择等能力。

Synthesis and Performance Evaluation of Super Water-absorbent Granular Gel Profile Control and Displacement Agent

A super water - absorbent granular gel profile control and displacement agent was synthesized using anionic monomer acrylic acid, cationic monomer quaternary ammonium salt and non - ionic monomer acrylamide as main raw materials, bi - methacrylamide as crosslinking agent, persulfate as water - soluble initiator, and adding inorganic blends. The optimum formulation and synthesis condition were determined as follows： neutralization was 90% - 125 %, mass fraction of total monomers was 30% -50%, mass fractions of initiator, crosslinking agent, acrylamide, acrylic acid, quaternary ammonium salt, and inorganic blend were respectively 0.10% -0.20%, 0.08% -0.12% , 40% -70% , 10% -30% , 10% -30% , and 10% -50% （based on mass of total monomers）, reaction temperature was 50 - 70 ℃. The result of performance evaluation on the profile control and displacement agent showd that the product had good expansibility, delayed swelling ability, temperature and salt resistance, erosion tolerance and oil -water selectivity.