摘要
为描述储集层微观参数对油水相对渗透率的影响,建立油水两相流的三维准静态孔隙网络模型,运用逾渗理论描述微观渗流机制,模拟初次油驱和二次水驱过程,并对相对渗透率进行了预测,计算结果与实验结果变化趋势基本一致,验证了孔隙网络模型模拟的有效性。利用孔隙网络模型研究水湿情况下孔喉比、配位数、形状因子对相对渗透率的影响。结果表明:孔喉比增大,残余油饱和度增大,水相达到同样的渗流能力所对应的含水饱和度相对增加;配位数增大,两相共流区变大,残余油饱和度减小,配位数对非润湿相油的相对渗透率影响较大;形状因子增加,残余油饱和度减小,两相共流区变大。
To describe the effect of microscopic parameters on oil-water relative permeability, a three-dimensional and quasi-static network model was established based on the percolation theory. Primary oil flooding and secondary water flooding were modeled and the relative permeability was calculated. Comparison with experimental results validated the model. The effects of pore-throat ratio, coordination number and shape factor on relative permeability were investigated in a water-wet condition by means of microscopic simulation. The results show that as pore-throat ratio becomes larger, residual oil saturation gets larger and the water saturation increases when water achieved the same flow ability. As coordination number increases, the co-flowing zones of water and oil increase and the residual oil saturation reduces. The coordination number strongly influences non-wetting phase relative permeability. The residual oil saturation decreases and co-flowing zones increase when the shape factor increases.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2006年第6期734-737,共4页
Petroleum Exploration and Development
基金
石油科技中青年创新基金(04E7029)
关键词
孔隙网络模型
相对渗透率
微观模拟
水湿
pore-scale network model
relative permeability
microscopic simulation
water-wet
