Acrylamide-2-acrylamido-2-methylpropanesulfonic acid-methacrylic acid-diallyl dimethyl ammonium chloride quadripolymer as drilling-fluid additive was synthesized by redox initation. The mud performances of the quadripolymer was evaluated in the laboratory. The results showed that acrylamide-2-acrylamido-2-methylpropanesulfonic acid-methacrylic acid-diallyl dimethyl ammonium chloride quadripolymer has very good heat resistance,depressing filter loss, salt tolerance, and protection against collapse.%采用氧化-还原引发体系合成丙烯酰胺/2-丙烯酰胺基-2-甲基丙磺酸/甲基丙烯酸/二烯丙基二甲基氯化铵四元共聚物作为钻井液处理剂。初步评价了此四元共聚物的泥浆性能,结果表明,AM/AMPS/MAA/DADMAC四元共聚物具有较好的降滤失和耐温性能,较强的抗盐能力,及较好的防塌效果。
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