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本文综述了采油中使用的两类粘土防膨剂,包括酸和盐、无机聚阳离子聚合物、阳离子活性剂、有机聚阳离子聚合物、有机硅烷、有机硅烷酯等。在这些粘土防膨剂中,含氮的有机聚阳离子聚合物,特别是在每个链节中含有两个或多个四价铵的聚合物,对抑制粘土膨胀特别有效,这种防膨剂还具有长效、耐酸、耐盐的特点。有机和无机粘土防膨剂复配使用,效果会更好。
This article reviews two types of clay anti-swelling agents used in oil recovery, including acids and salts, inorganic polycationic polymers, cationic surfactants, organic polycationic polymers, organosilanes, and organosilanes. Of these clay anti-swelling agents, nitrogen-containing organic polycationic polymers, particularly polymers containing two or more tetravalent ammonium atoms per chain link, are particularly effective at inhibiting the swelling of the clay. Such anti-swelling agents Also has long-lasting, acid, salt-resistant features. Organic and inorganic clay anti-swelling compound used in combination, the effect will be better.