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通过对部分水解聚丙烯酰胺-二乙烯三胺五乙酸-二邻甲苯基硫脲-引发剂冻胶调剖剂体系的各影响因素的研究,发现反应前体系的可泵性良好,pH值对本体系成胶时间和成胶强度影响较大,pH值在3.7～7.2之间为宜,当二乙烯三胺五乙酸的加入量为0.06%、二邻甲苯基硫脲的加入量为0.14%、聚丙烯酰胺的加入量为0.8%时,生成冻胶的强度在500 Pa.s以上,且在50℃下半年内不会脱水破胶,同时具有很强的抗盐性能。由岩心流动实验可知对高中渗均有很高的堵塞性能(94%以上)。
Through the study of various influencing factors of partially hydrolyzed polyacrylamide-diethylenetriamine pentaacetic acid-di-o-tolylthiourea-initiator jelly control agent system, it was found that the pumpability of pre-reaction system was good, The time and gelling strength of the system have a great influence on the gelling time and the pH is between 3.7 and 7.2. When the amount of diethylenetriamine pentaacetic acid is 0.06%, the amount of di-o-tolylthiourea is 0.14% The polyacrylamide is added in an amount of 0.8%, the strength of the gel generated in more than 500 Pa.s, and at 50 ℃ within six months will not dehydration gel, and has strong salt resistance. It is known from the core flow experiments that there is a very high blockage (over 94%) in both high and medium permeability.