摘要
用模拟油藏注水驱油的不稳定状态法测定了油藏砂岩岩样的润湿性对油、水相对渗透率以及驱油效率的影响.测定结果表明,试验所用的油基和水基泥浆滤液的侵入均对油相渗透率造成相当严重的损害.油基泥浆滤液比水基泥浆滤液更容易使亲水砂岩转变为亲油砂岩.润湿性改变使油、水相对渗透率关系曲线发生明显变化.与亲水岩石相比.亲油岩石的驱油效率也明显下降.
The influence of the wettability of core samples from reservoir on the relative permeability of oil/water and on the oil displacement efficiency was studied experimentally by means of the unstable state method. Water flooding in reservoir was simulated. The measurement results showed that the invasion of the filtrates of oil-base mud and water-base mud has a considerable effect on oil phase permeability. The filtrate of oil-base mud can transform water-wet sandstones into oil-wet sandstones more easily than that of water-base mud. Furthermore, the change of wettability of sandstone was expressed by the curve shape of the oil and water relative permeability. The oil displacement efficiency of oil-wet cores has a distinct decline compared with that of water-wet cores.
出处
《石油大学学报（自然科学版）》
CSCD
1993年第5期55-59,共5页
Journal of the University of Petroleum,China(Edition of Natural Science)
关键词
渗透率
驱油
钻井泥浆
油层水
Drilling fluid: Wettability: Formation damage: Relative permeability: Oil-displacement efficiency
