摘要
油水两相渗流过程中,毛管力不仅是饱和度的函数,还是饱和度变化率的函数;动态毛管力与黏度、渗透率、驱替速率等因素相关。通过建立考虑动态毛管力效应的油水两相渗流数学模型,利用数值模拟软件研究动态毛管力对油藏开发动态的影响,并考察动态毛管力与储层非均质性的关系。结果表明,动态毛管力造成水驱油过程中含水率加速上升,产油量下降,产生阻力效应,同时加剧了油藏的非均质性。
Capillary pressure is not only a function of saturation but also a function of saturation change rate for oil-water two-phase flow.The dynamic capillary pressure is related to viscosity,permeability and displacement rate.Through the establishment of mathematical model for dynamic capillary pressure under oil-water two-phase flow,by using the numerical simulation software,the dynamic capillary pressure effect on development dynamic status in low permeability reservoir has been analyzed,and the relationship between dynamic capillary pressure and the reservoir heterogeneity has also been discussed.The results indicate the dynamic capillary pressure will accelerate the increase of water cut and decrease of oil rate,and heterogeneity will exacerbate the impact of dynamic capillary pressure.
出处
《石油地质与工程》
CAS
2016年第4期115-118,149,共4页
Petroleum Geology and Engineering
基金
国家重点基础研究发展计划(973)项目子课题“致密油高效开发油藏工程理论与方法研究”(2015250905)
关键词
动态毛管力
低渗油藏
开发动态
数值模拟
非均质性
dynamic capillary pressure
low permeability reservoir
development dynamic status
numerical simulation
heterogeneity
