长庆油包水乳状液的稳定性与沥青质含量的关系  

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

作　　者：赵一潞 康万利 殷夏 耿杰 唐雪辰 杨立华 苑慧莹 ZHAO Yilu1,KANG Wanli1,YIN Xia1,GENG Jie,TANG Xuechen1,YANG Lihua2,YUAN Huiying2(School of Petroleum Engineering,China University of Petroleum,Qingdao 266580,China;2.Changqing Oilfield Oil and Gas Technology Research Institute CNPC,Xi＇an 710018,Chin)

机构地区：[1]中国石油大学石油工程学院,山东青岛266580 [2]中国石油长庆油田油气工艺研究院,陕西西安710018

出　　处：《石油学报（石油加工）》2018年第3期592-599,共8页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家自然科学基金项目(51774309和21273286)资助

摘　　要：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。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.

关 键 词：轻质原油 稳定性 沥青质 界面膜强度 原油黏度 

分 类 号：TE39[石油与天然气工程—油气田开发工程]