摘要
以SN油田S7块油藏为例研究了表面活性剂进入多孔介质后,在岩石/油/水这个复杂系统中的渗流、驱油过程。表面活性剂对残余油的作用机理分为乳化、运移、富集3个方面。低界面张力体系能使油珠分散,使油珠直径变小,使油珠易于流动。实验研究表明,注入表面活性剂后,相对渗透率曲线发生变化,水相曲线左移,液相渗透率明显提高,残余饱和度减少。
Taking the S7 reservoir of SN Oilfleld as an example, a study is made of flow and oil displacement process of surfactant in the complex rock / oil / water system after it enters porous media. Surfactant effects on residual oil include the following three aspects： emulsion, migration and enrichment. Low interfacial tension system can make the oil disperse, then the oil droplets become smaller, so it is easy to flow. Experimental studies show, after injection of surfactant, relative permeability curve changes, phase curve shifts to the right, and liquid phase permeability increases, reducing residual saturation.
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第1期140-143,共4页
Journal of Southwest Petroleum University(Science & Technology Edition)
关键词
表面活性剂
两相渗流
界面张力
驱油效率
相渗曲线
surfactant
two phase flow
interfacial tension
oil displacement efficiency
relative permeability curve
