关键词: 砂岩储层, 相对渗透率, 统计规律, 油藏数值模拟, 含水率变化, 大庆油田

Abstract: Statistical formulas of connate water saturation,water saturation at residual oil,oil relative permeability at connate water saturation,water relative permeability at residual oil with the effective permeability and an average relative permeability curve were obtained on the basis of oil-water relative permeability curves of 617 natural cores in Daqing Oilfield by unstable state experiment. A computing method for some representative relative permeability curve of the reservoir rock with varying permeability was proposed. According to the relative permeability statistical regularity,the water-cut rising regularities of water-drive homogenous reservoirs with well distances of 250 m and 500 m and varying permeability in Daqing Oilfield were investigated by Buckley-Leverrett theory and reservoir numerical simulation.

Key words: sandstone reservoir, relative permeability, statistical regularity, reservoir numerical simulation, water-cut variation, Daqing Oilfield