Abstract: The two surfactants (SS, SHSAHN6) and two polymers (KYPAM, ZLⅡ) compound with Na2CO3 was made, then study on the viscoelasticity of multisystem, evaluate the interfacial tension of multisystem and do physical oil displacement experiments with heterogeneous artificial cores. The optimal multisystem was then selected among various systems as the one to be applied in the field test. The results show that: Along with the increase of shear rate, the viscosity of each multisystem decreases, but the decline phase is not obvious. The elasticity of different systems increases along with the increase of shear rate and the superposition of elasticity points indicate they have good match. Four systems are all achieve ultralow interfacial tension in five minutes, and the steady interfacial tension will remain low. SS is better than SHSAHN6 in decreasing interfacial tension, and the surface tension stability of KYPAM ternary system is much better than ZLⅡternary system. From the perspective of flooding effect evaluation, the chemical flooding recovery of KYPAM ternary system is higher than ZLⅡternary system, the oil displacement efficiency of SS ternary system is better than SHSAHN6 ternary system. 

Key words: Ternary multisystem,    , Viscoelasticity,    ,  Interfacial tension,   ,  Displacement efficiency

摘要： 将SS、SHSA灢HN6两种表面活性剂和KYPAM、ZL灢栻型两种聚合物以及弱碱Na2CO3 进行复配,对复配体系进行黏弹性研究、界面张力的评价以及在纵向非均质人造岩心上进行物理模拟驱油实验,从各种复配体系中选出最佳的弱碱三元复配体系应用于现场试验。结果表明,每种复配体系的黏度都随剪切速率的增大而下降,不同类型的活性剂基本不影响KYPAM 三元复合体系的黏度,而对ZL灢栻型三元复合体系的黏度却有所影响。不同复配体系的弹性都随着剪切速率的增加而增加,几种复配体系的弹性基本相同。4种复配体系均在15min内达到超低界面张力,且稳态界面张力都保持在超低范围内,两种表面活性剂都有较好的降低界面张力的能力。在驱油效果评价上,SS所形成的三元体系驱油效果均好于SHSA灢HN6所形成的三元体系,KYPAM 和ZL灢栻型两种聚合物的三元复合体系的驱油效果KYPAM 的占优。

关键词: 三元复配体系,    , 黏弹性 , 界面张力, 驱油效果