关键词: 三元复配体系,    , 黏弹性 , 界面张力, 驱油效果

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