关键词: 原油乳状液稳定性, 界面压, 界面膜强度

Abstract: The presence of interfacial film between water and oil phases is the most important factor to affect stability of water-in-crude oil emulsion.From thermodynamics the lower the interfacial tension of water-oil interface,the higher the stability of the emulsion is.Generally,however,the kinetics is uneven more important factor which affects the kinetics of coalesence between droplets.Interfacial pressure is an important parameter for the strength of the interfacial film.The theoretical analysis and investigation of the relation between interfacial pressure and the stability of the emulsions stabilized by the asphaltene and resin fractions show drat it is interfacial pressure Cnot interfacial tension) can be used for evaluating the stability of the emulsions,and for a certain kind of surfaccant,the larger the interfacial pressure,the more stable the emulsion is.