摘要
建立了碳酸盐岩亲油岩块的毛细管渗流方程,讨论了岩块高度、原油黏度、岩石表面润湿性和孔喉大小分布对不同底水驱替速率下的岩块原油采出程度的影响。因润湿性不同,岩块高度对原油采出程度影响有较大差别。水湿岩块,高度越小,采出程度越大;而油湿岩块,高度越高,采出程度越大。随着底水驱替速率增加,水沿着阻力最小的大型裂缝迅速突破,各种影响基质岩块采出程度的因素,都改变不了剩余油大量滞留于这部分孔喉空间的事实。
The capillary flow equation of oil-wet carbonate rock block is set up,and the influence of block height,oil viscosity,rock surface wettability and the size of pore and throat on recovery under the condition of different bottom water drive rate is discussed.Block height influences recovery differently due to the different wet ability.To water-wet block,the lower the height is,the greater the recovery is,to oil-wet block,the higher the block height is,the greater the recovery is.As the increase of bottom water drive rate,water breaks through quickly along the big fractures.The factors influencing matrix block recovery can not change the fact that a large amount of remaining oil is left in the pore and throat space.
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第5期112-116,共5页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
中国石化科技开发项目"碳酸盐岩缝洞型储层驱替实验研究"(P06047)
关键词
碳酸盐岩
基质岩块
底水驱
渗流方程
润湿性
carbonate rock
matrix block
bottom water drive
flow equation
wettability
