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首页> 外文期刊>Journal of industrial and engineering chemistry >Lab simulation of profile modification and enhanced oil recovery with a quaternary ammonium cationic polymer
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Lab simulation of profile modification and enhanced oil recovery with a quaternary ammonium cationic polymer

机译：用季铵阳离子聚合物进行轮廓改性和提高采油率的实验室模拟

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Long-term water flooding in oilfield exploitation generally results in a marked increase of interlayer and/ or inner-layer heterogeneity of oil reservoirs and premature polymer production in large quantities from flooding reservoirs. This paper presents a novel quaternary ammonium cationic polymer (NCP), which was prepared by using maize starch and (2,3-epoxypropyl)trimethylammonium chloride as raw materials. The effect of NCP on water plugging and profile modificaton after polymer HPAM (partially hydrolyzed polyacrylamide) flooding was evaluated by laboratory simulation tests of enhanced oil recovery. The experimental results indicate that crosslinking gel system formed after HPAM-NCP alternate injection could effectively seal off the high permeability zone to force the successive liquid to flow to mid-low permeability zones and get profile control in depth. In addition, the contact angle measurements reveal that the adsorption of NCP on the montmorillonite changed its surface wettability and enhanced its hydrophilicity, which promoted enhance oil recovery significantly.
机译：油田开发中的长期注水通常会导致油层的层间和/或内层非均质性显着提高，并导致大量的早产聚合物从油藏中开采出来。本文提出了一种新型的季铵阳离子聚合物（NCP），它是用玉米淀粉和（2,3-环氧丙基）三甲基氯化铵为原料制备的。通过提高油采收率的实验室模拟试验评估了NCP对聚合物HPAM（部分水解的聚丙烯酰胺）驱油后堵水和剖面变化的影响。实验结果表明，HPAM-NCP交替注入后形成的交联凝胶体系可以有效封闭高渗透率区，迫使相继的液体流向中低渗透率区，并进行深度剖面控制。此外，接触角测量结果表明，NCP在蒙脱土上的吸附改变了其表面润湿性并增强了其亲水性，从而显着促进了采油率的提高。

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