抗盐聚合物分子集聚影响因素及其渗流特性

INFLUENCING FACTORS AND THE CHARACTERISTICS OF FLOWING THROUGH POROUS MEDIA OF SALT RESISTANCE POLYMER MOLECULAR AGGRESSION

利用电镜扫描方法研究了驱油用抗盐聚合物ASPAM和部分水解聚丙烯酰胺PHPAM溶液的分子聚集现象;模拟现场聚合物注入过程,分析了聚合物溶液质量浓度、配制水矿化度、多级过滤和机械剪切作用对聚合物分子聚集体的影响;通过岩芯实验,分析了ASPAM的渗流特性。结果表明,ASPAM显示了分子的聚集状态,达到聚集状态后其粘度显著提高;ASPAM较PHPAM具有优异的抗盐和抗剪切性,在多孔介质中的动态滞留量更大。实验研究对现场应用抗盐聚合物驱油,以及聚合物的改性具有指导意义。

Salt-resistance polymer ASPAM used for oil flooding and the molecular aggregation of hydrolysis polyacrylamide PHPAM are researched by using electronic scanning,the process of injecting polymer in situ is simulated,and the influence of the polymer solution concentration,make-up water salinity,multi- level filtration and mechanic shearing on polymer molecular aggregation is analyzed,by means of core test,the characteristic of ASPAM flow through porous media is analyzed.Result indicates ASPAM shows,when aggregation of molecular reaches aggregating situation,the viscosity increases considerably,compared with PHPAM,ASPAM is of better ability of salt- resistance and shearing-resistance,in porous media,its dynamic liquid-keeping is more.The research is meaningful for using salt- resistance polymer flooding.