摘要
基于质量守恒定律,建立三相五组分考虑聚合物弹性增黏、降低残余油和稠油黏弹性效应的聚合物驱数学模型,并采用IMPES方法进行求解.计算分析表明,黏弹性聚合物驱可降低残余油饱和度,增加驱油体系黏度,提高原油采收率;采收率随注入浓度增大先迅速增加后趋于稳定,最优值为2 000 mg.L-1;随注入速度先增加后降低,存在最优值;随聚合物段塞增大先迅速增加后缓慢增加并趋于稳定,最佳注入量约为0.6 PV;随原油松弛时间增加呈线性增加.
A visco-elasticity polymer flooding mathematical model with three phases and five components is established with mass conservation principle.IMPES method is used to simulate the polymer flooding considering tackifying effect of elasticity,action of decreasing residual oil and visco-elasticity of heavy crude.It indicates that visco-elasticity polymer flooding decreases saturation of residual oil and increases viscosity of flooding system effectively,and then enhances oil recovery.As polymer concentration increases,oil recovery rises qucikly,and then tends stable.An optimal value is about 2 000mg·L-1.As injection rate grows,oil recovery increases and then declines.There exists an optimum value.Oil recovery increases rapidly with the increasing of injection volume,and then tends stable.The best volume is 0.6PV.
出处
《计算物理》
EI
CSCD
北大核心
2011年第6期861-868,共8页
Chinese Journal of Computational Physics
基金
国家科技重大专项(2008ZX05024-002-012)资助项目
关键词
黏弹性
聚合物驱
数学模型
数值模拟
提高采收率
visco-elasticity
polymer flooding
mathematical model
numerical simulation
enhanced oil recovery
