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针对大庆油田萨南东部过渡带三元复合驱界面张力不能达到１０－３ｍＮ／ｍ这一现象，利用复配碱改善了该区三元复合驱效果，使其界面张力由１０－２～１０－１ｍＮ／ｍ降低到１０－３ｍＮ／ｍ，使萨中、萨北纯油区界面张力下降了０５～１个数量级，表活剂吸附量降低３５２％，天然岩心驱油效率提高３～６个百分点
In view of the phenomenon that the interfacial tension can not reach 10-3mN / m in the transitional zone of southern Saanen in Daqing Oilfield, the effect of ternary compound flooding in this area is improved by the compound alkali, the interfacial tension increases from 10-2 to 10- 1mN / m was reduced to 10-3mN / m, the interfacial tension in Sazhong and Saabu pure oil areas was decreased by 0.55 to 1 order of magnitude, the adsorption capacity of surfactant was reduced by 35.2% and the natural core flooding efficiency was increased by 3 ~ 6 percentage points