摘要
自吸是裂缝性油藏采油的一个特别重要的现象。自吸过程取决于许多复杂的因素相互作用。主要研究了原油组成 ,孔隙结构对自吸的影响。研究中使用的多孔介质有两种类型 :分别为砂岩和石灰岩。研究结果表明 ,原油组分、孔隙结构对自吸速度及最终采收率有较强影响。对砂岩体系 ,在不同束缚水饱和度条件下 ,自吸最终采收率变化不大 ,而对石灰岩体系 ,最终采收率与束缚水饱和度有很大关系。原油组分对自吸的影响表现为润湿性改变而产生的毛管力变化。
Self adsorption is an important phenomenon in the production of fractural reservoirs.The process of self adsorption depends on the interaction of many complicated factors.This paper mainly studies the effect of oil composition and pore structure on self adsorption.The multi porous media used in the study includes two types: sandstone and limestone.The result shows the oil composition and pore structure have a strong effect on the rate of self adsorption and ultimate recovery.For a sandstone system,with different saturation of irreducible water,self adsorption ultimate recovery changes a little.But for a limestone system,ultimate recovery is closely related to the saturation of irreducible water.The effect of oil composition on self adsorption shows the capillary force change with the wettability change.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2000年第6期18-20,共3页
Petroleum Geology & Oilfield Development in Daqing
关键词
原油组分
孔隙结构
自吸
最终采收率
裂缝性油田
oil compositon
pore structure
self adsorption
ultimate recovery
capillary pressure
wettability
