聚氧乙烯基型降滤失剂SJ-1的合成与性能评价

Synthesis and Evaluation of Fluid Loss Additive SJ-1 for Polyoxyethylene type

摘要:

摘要：目前聚合物降滤失剂普遍存在抗高温、抗盐能力差的问题，为解决这一问题，本文从分子结构入手，优选具有一定抗温、耐盐的聚合单体。本文采用2-丙烯酰胺基-2-甲基丙磺酸(AMPS)、丙烯酰胺（AM）与具有大分子侧链聚氧乙烯基(C2H4O)n的单体JM，三元共聚得到钻井液用降滤失剂SJ-1，并对其进行了性能评价。本文通过单因素实验优化得到最佳合成方案为：单体质量为15%，反应温度控制在60℃，引发剂用量为0.2%，n(AM):n(AMPS):n(JM)=14:5:1。通过红外表征可知，本实验所合成的聚合物结构和预计的结构一致。性能评价表明，所合成的聚合物具有较好抗温能力（200℃），在盐浓度为30%的盐水泥浆中仍具有较好的降失水能力。

Abstract:

Abstract: To improve the poor performance of fluid loss additive in high temperature resistance and salt resistance, this paper has introduced a novel monomer which has specific structure. The 2-acrylamido-2-methyl-propanesulfonic acid (AMPS), acrylamide(AM) and JM containing molecular side chain polyoxyethylene(C2H4O)n have been involved in the copolymerization of this filtrate reducer for drilling fluid SJ-1 of which performance has been evaluated. We have also discussed a serial of experimental factors and obtained the optimum scheme of copolymerization, which is, monomer mass is 15%, temperature of reaction is 60℃, dosage of initiator is 0.2%, molar ratio of monomer AM:AMPS:JM is 14:5:1. The results of infrared characterization have confirmed that the structure of our product is consistent with that of what we designed. Moreover, this polymer has shown good temperature resistance (200℃) and salt resistance (salt concentration up to 30%).