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宽分子量分布的石油磺酸盐（ＳＰＳ）在低浓度（０．４％）时有正丁醇、正构烷烃（正庚烷、正辛烷、正壬烷、正癸烷、正十二烷）、盐存在的情况下能形成中相微乳液．研究了盐浓度、烷烃种类、醇浓度对该体系中相微乳液的形成及特性影响，得到中相微乳液的特性参数：最佳含盐量Ｓ、增溶参数σ、盐宽△Ｓ、界面张力γ等，并从理论上进行了探讨．采用模拟驱油装置测定了体系的驱油效率，对优化驱油体系设计具有重要意义．
Broad molecular weight distribution of petroleum sulfonate (SPS) at low concentrations (0.4%) n-butanol, normal paraffins (n-heptane, n-octane, n-nonane, n-decane, n-dodecane ), The presence of salt can form a medium phase microemulsion. The effects of salt concentration, alkane type and alcohol concentration on the formation and properties of phase microemulsion in the system were studied. The characteristics of medium phase microemulsion were obtained: optimum salt content S, solubilization parameter σ, salt width △ S, interface Tension γ, etc., and theoretically discussed. Using simulated oil displacement device to determine the displacement efficiency of the system is of great significance to optimize the design of displacement system.