长庆油包水乳状液的稳定性与沥青质含量的关系

以长庆轻质原油为例，探讨了原油组分对乳状液稳定性的影响规律；采用煤油萃取轻质组分及二 甲苯溶解沥青质两种方法证实了沥青质是稳定轻质油包水乳状液的主要因素；采用流变仪、布氏黏度计 和光学显微镜等仪器测定了含水原油乳状液界面膜强度、油相黏度和乳状液尺寸。结果表明，取决于沥 青质的油 水界面膜强度和油相黏度是影响原油乳状液稳定性的主要因素，沥青质含量越高，油 水界 面膜强度和油相黏度越大，乳状液越稳定。

Relationship Between the Stability of Changqing Water in Oil Emulsions and Asphaltene Content

 With respect to Changqing emulsified light crude oil, the impacts of oil components on the emulsion stability were studied. It is confirmed that asphaltene is the major factor for stabilizing light crude oil emulsions through two approaches, which use kerosene to extract light components and xylene to dissolve asphaltene. Besides, the interfacial film strength, oil phase viscosity and emulsions size were measured by rheometer, Brookfield viscometer and optical microscope. Results show that the interfacial film strength and oil viscosity, which are dependent on asphaltene, are the main factor affecting crude oil emulsion stability. With the increase of asphaltene content, the interfacial film becomes stronger, the oil gets more viscous. As a result, the emulsion becomes stabler.