在不同的矿化度条件下,聚表二元复合体系的增黏幅度、改变油水界面张力程度也不相同,而二元体系的稳定性直接影响驱油效果,针对此问题,开展室内实验确定不同矿化度对二元体系的影响.实验结果表明,水的矿化度在3 000 mg/L以上时,随矿化度增大体系黏度变化幅度大为减小,其抗盐性能增强,表面活性剂浓度对体系黏度影响不大;水的矿化度在3 000 mg/L以上时,随矿化度增大体系界面张力逐渐降低,当表面活性剂浓度由0.3％增加到0.4％时,体系界面张力下降速度变缓,能够达到10-2 mN/m数量级,满足实际矿场需要.%Under different salinity conditions,the viscosity of binary system changes amplitude,the interfacial tension is not the same degree of stability,while binary system directly affect the oil displacement effect,in order to solve this problem,to carry out laboratory experiments to determine the effects of different salinity on binary system.Resules show that salinity is above 3 000 mg/L,the viscosity change range decreases greatly with the increase of salinity,the salt resistance increases,and the surfactant concentration has little effect on the viscosity of the system.The salinity is above 3 000 mg/L,the interfacial tension decreased with increasing salinity,when the surfactant concentration is increased from 0.3％ to 0.4％,the interfacial tension decreased slowly,can reach 10-2 mN/m magnitude,meet the actual needs of the fields.
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