低浓度表面活性剂-聚合物二元复合驱油体系的分子模拟与配方设计

被引:26
作者
曹绪龙
机构
[1] 中国石化胜利油田地质科学研究院
关键词
表面活性剂-聚合物二元复合驱油体系; 耗散颗粒动力学模拟; 烷基苯磺酸钠; 石油磺酸盐; 界面张力; 提高采收率;
D O I
暂无
中图分类号
TE357.4 [];
学科分类号
082002 ;
摘要
采用耗散颗粒动力学(DPD)方法在介观层次上模拟了表面活性剂烷基苯磺酸盐在油-水界面的排布行为,考察了分子结构、油相等因素对界面密度和界面效率的影响,探讨了利用表面活性剂复配协同效应提高界面活性的机理。实验研究了表面活性剂类型、油相、表面活性剂复配等对油-水界面张力的影响。结果表明,"阴+非"表面活性剂复配可使油-水界面张力降低1个数最级。根据分子模拟和实验研究结果,结合孤东七区试验区原油特点,提出了"0.3%石油磺酸盐+0.1%表面活性剂1#+0.15%聚合物"的二元复合驱配方,可使油-水界面张力降低至2.95×10-3mN/m,物理模拟实验提高采收率高达18.1%。
引用
收藏
页码:682 / 688
页数:7
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