摘要
针对大庆油田油层的具体情况,实验采用3种不同类型的表面活性剂配制了三元复合驱油体系,并在3组不同渗透率人造均质岩心上进行了微观驱油实验,研究了不同体系的界面张力与驱油效率的关系。实验结果表明:在渗透率相同的条件下,驱油体系与原油之间的界面张力越低,驱油效率越高;在驱油体系相同的条件下,具有中等渗透率岩心的驱油效率更高一些。超低界面张力并不是绝对必要的。
ASP flooding pilot test has been a great success in Daqing Oil Field. For specific condition of reservoir(temperature being 45℃, viscosity being 11.4mPa.s, and salinity being 4456mg/L), there are three different kinds of surfactant prepared for the displacement system in the experiment. The microscopic displacement test has been done in three different permeability,synthetic, homogenous cores, in order to study the relation between interfacial tension and displacement efficiency of different systems. The result shows: in the condition of the same permeability, if the IFT between the displacement system and oil is lower, the efficiency is higher; in the condition of the same displacement system, the efficiency is higher in the core which has medium permeability. Moreover, ultra-low IT is not necessary.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2005年第3期81-83,i006-i007,共5页
Petroleum Geology & Oilfield Development in Daqing
关键词
复合驱
渗透率
界面张力
表面活性剂
驱油效率
ASP flooding
permeability
interfacial tension
surfactant
displacement efficiency
