【摘要】 本文用只改变一个变量的方法制备了一系列有中间相存在的相图。这些变量包括含盐量、醇浓度、醇的烷基碳数、活性剂中烷基碳数、活性剂浓度、油水相体积比、烷烃碳数和温度等。随变量数值的增加,这一系列相图的相区变化可分为两种类型,即γ→β→α型和α→β→γ型。相图相区变化类型是由各变量对活性剂的亲水亲油平衡和油水相的极性影响所决定的。利用相图可以决定原油的等效烷烃碳数(EACN)和选用适当的活性剂,用于微乳状液驱油。更多还原

【Abstract】 A series of microemulsion phase diagram with middle phase by only qhanging a variable and fixing the others have been plotted. These variables include salinity, the concentration of alcohol and surfactant, the alkyl carbon number in alcohol and surfactant, the phase volume ratio of oil and water, the carbon number of alkane, and temperature. With the increasing value of variables the changing pattern of phase region in these phase diagram can be divided into two kinds, i. e. γ→β→α and α→β→γ . This depends on the hydrophilic and lipophilic balance in surfactant. These phase diagrain can be used for determining the EACN (e-ffective alkane carbon number) of crude oil and selecting appropriate surfactant for enhanced oil recovery by microemulsion flooding.更多还原