摘要
通过室内模拟实验 ,研究了在三元复合驱中大庆油田岩石润湿性的变化规律 ,分析了润湿性的变化机理。结果表明 ,三元复合驱后 ,岩石润湿性发生变化 ,总的趋势是岩石润湿性向亲水方向转化 ,其转化幅度与三元复合体系中化学剂浓度有关。三元复合驱中岩石润湿性的变化主要是因为化学剂与地层中二价阳离子、岩石矿物相互作用 ,改变岩石的表面性质以及碱对吸附在岩石表面的刚性油膜的溶解 ,使各相之间的界面张力发生变化。
This paper studies the rule of rock wettability change of Daqing Oil Field in ASP flooding and analyzes the mechanism of wettability change through lab simulation test. The result shows that the rock wettability changes after ASP flooding with a trend to water wettability. The transforming magnitude relates to the chemical concentration in the ASP system. The rock wettability changes because the chemical interacts with the divalent cations and rock mineral in the formation, changes the surface property of rock and the solution of alkali to the rigid oil film adsorbed on the surface of rock, and changes the interfacial tension among various phases.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2000年第2期34-36,共3页
Petroleum Geology & Oilfield Development in Daqing
关键词
大庆油田
三元复合驱
岩石润湿性
实验研究
驱油
Daqing Oil Field
ASP flooding
ASP system
rock wettability
experimental study
