储集层微观参数对油水相对渗透率影响的微观模拟研究  

Microscopic simulation of the effect of microscopic reservoir parameters on oil-water relative permeability

作　　者：高慧梅[1] 姜汉桥[2] 陈民锋[2] 何应付[3] 

机构地区：[1]中国石油大学(北京)石油天然气工程学院 [2]中国石油大学(北京)提高采收率中心 [3]中国科学院渗流流体力学研究所

出　　处：《石油勘探与开发》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)

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.

关 键 词：孔隙网络模型 相对渗透率 微观模拟 水湿 

分 类 号：TE319[石油与天然气工程—油气田开发工程]