摘要:根据吉林油田某区块的油藏条件,运用数值模拟软件,研究不同韵律储层驱油效果。数模结果显示,注水开发时,均质储层的开发效果最好,反韵律储层次之,正韵律储层最差。气水交替驱时,均质储层的开发效果最好,正韵律储层次之,反韵律储层最差。注水开发与交替驱开发规律的差异,其根本原因是由CO2、油和水的密度差异造成的。水驱油时,水容易沿储层下部快速推进,反韵律储层减缓了这一趋势。气驱油时,CO2容易沿储层上部快速推进,正韵律储层减缓了这一趋势。注水开发时,要优选均质储层,其次是反韵律储层。交替驱开发时,要优选均质储层,其次是正韵律储层。%According to a certain block in Jilin Oilfield,displacement efficiencies of different rhythmic reservoirs were studied by using numerical simulation. The results of numerical simulation show that for waterflooding development,order of displacement efficiency is homogeneous reservoir reverse rhythm reservoir positive rhythm reservoir; for gas-alternating-water flooding development,order of displacement efficiency is homogeneous reservoir positive rhythm reservoir reverse rhythm reservoir. The difference of development law between wateflooding and CO2 flooding is fundamentally caused by density difference between CO2,oil and water. When water drives oil,water advances easily and rapidly along the lower part of reservoir and the trend is slowed down in reverse rhythm reservoir. However,when gas drives oil,CO2 advances easily and rapid along the upper part of reservoir and the trend is slowed down in positive rhythm reservoir. Therefore,when waterflooding develops,the first is the homogeneous reservoir,and the second is the reverse rhythm reservoir. When gas-alternating-water flooding develops,the first is the homogeneous reservoir,and the second is the positive rhythm reservoir.