摘要
基于油藏数值模拟定义了"聚合物驱受效剩余油饱和度"新概念,研究了聚合物驱作用下宏观剩余油受效机制及受效剩余油在油藏中的分布部位和形态,讨论了储层韵律性、原油黏度和注聚用量对受效剩余油分布的影响。研究结果表明,受效剩余油在油层内纵向上主要分布于注入水窜流区的上部,呈斜纺锤体形状,平面上受效区域则位于注采井间,呈环状分布。不同韵律储层剩余油受效机制及受效剩余油分布有所不同。随着原油黏度的增加,受效剩余油主体区向油层底部移动,且受效剩余油饱和度峰值降低。随着注聚用量的增多,受效剩余油范围沿斜纺锤体的轴线向两侧扩大。
A new concept of response remaining oil saturation in polymer flooding was defined on the basis of reservoir numerical simulation.The macroscopic response mechanism of remaining oil was discussed.The places and shapes of response remaining oil in reservoirs with polymer flooding were investigated.The influences of reservoir rhythm,oil viscosity and the amount of polymer injection on the distribution of response remaining oil were analyzed.The research results showed that the response remaining oil vertically distributed in the upper parts of the cross-flow zones and took on the shape of spindle.The response zones were horizontally located between the injected wells and producing wells and took on the circular shape.The response mechanism and distribution of remaining oil were various in the different rhythm formations.The body of response remaining oil moved to the lower parts of formation,and the peak values of response remaining oil saturation declined with the increase of oil viscosity.As the injection amount of polymer increased,the boundary of response remaining oil extended bilaterally along the axis of spindle.
出处
《石油学报》
EI
CAS
CSCD
北大核心
2010年第1期96-99,共4页
Acta Petrolei Sinica
基金
国家自然科学基金(No.10302021和No.10772200)
国家科技重大专项(2008ZX05011)
中国博士后科学基金(20080440058)联合资助
关键词
油藏模拟
聚合物驱
剩余油分布
影响因素
原油黏度
聚合物注入量
reservoir simulation
polymer flooding
remaining oil distribution
influential factor
oil viscosity
polymer injection amount
