Both-branch amphiphilic polymer oil displacing system: Molecular weight, surfactant interactions and enhanced oil recovery performance
Both-branch amphiphilic polymer oil displacing system: Molecular weight, surfactant interactions and enhanced oil recovery performance
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DOI：
10.1016/j.colsurfa.2016.09.031
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发表时间：
2016-11
期刊：
影响因子：
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通讯作者：
Jiang Yanfeng;Duan-ping Wang;Xu-long Cao;Lanlei Guo;Yang-wen Zhu
中科院分区：
文献类型：
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作者：
Jiang Yanfeng;Duan-ping Wang;Xu-long Cao;Lanlei Guo;Yang-wen Zhu
以N-十六烷基苄基丙烯酰胺为疏水共聚单体，采用水相胶束共聚法合成了疏水改性聚丙烯酰胺聚合物。研究了聚合物的相对分子质量和表面活性剂相互作用对聚合物的流变性和油水界面活性的影响。用荧光探针法、差示扫描量热法和电子显微镜对两亲聚合物的临界聚集浓度和网络结构强度进行了测定，结果表明，随着相对分子质量的增加，两亲聚合物的临界聚集浓度降低，网络结构强度增大。加入表面活性剂十二烷基硫酸钠(十二烷基硫酸钠)后，随着十二烷基硫酸钠浓度的增加，溶液粘度先增大后减小，油水动态界面张力比单独使用时降低两个数量级。聚合物/表面活性剂复合体系提高采收率的结果是，由于增粘和表面活性的协同作用，可以显着降低剩余油饱和度。与基准聚合物相比，总采收率提高了10-25%。
Hydrophobically modified polyacrylamidepolymers were synthesized by an aqueous micellar copolymerization, theN-benzyl-N-n-hexadecyl acrylamide being used as hydrophobic comonomer. The effect of the molecular weight (MW) and surfactant interactions on the rheological properties and oil-water interfacial activity were studied. The results indicate that increasing MW, the critical aggregation concentration of amphiphilic polymer will be decreased, and the network structural strength increased, which was measured by fluorescent probes, DLS and electron microscope. Mixing with the surfactant, sodium dodecyl sulfate (SDS), the solution viscosity increased at first and decreased later on with increasing the ratio of SDS concentration, and the dynamic interfacial tension between oil and water can be reduced by two orders of magnitude compared to the polymer solution only. The result of enhance oil recovery performance of the polymer/surfactant compound system is that it can significantly reduce the residual oil saturation due to the synergistic effect of the increasing viscosity and surface activity. The overall recovery efficiency was raised by 10–25% OOIP compared to the baseline polymers.