石油勘探与开发2012，Vol.39Issue(3)：378-384,7.
低渗透油藏毛细管压力动态效应
Dynamic effect of capillary pressure in low permeability reservoirs
摘要
Abstract
The dynamic effect of capillary pressure in oil-water two-phase percolation flow in low permeability reservoirs was investigated by experiment and numerical simulation. An experimental apparatus was constructed to measure the relationship between the dynamic capillary pressure and water saturation change rate, and the dynamic capillary coefficient of low-permeability cores was calculated. A one-dimensional mathematical percolation model was established to analyze the effect of dynamic capillary pressure on waterflooding process. The dynamic capillary pressure effect is too significant to be neglected. The relationship between the dynamic capillary pressure and the change rate of wetting phase saturation is almost linear. The lower the rock permeability is, the greater the dynamic capillary coefficient and threshold pressure gradient are. One of the reasons for non-Darcy two-phase percolation flow is the dynamic capillary pressure effect. The dynamic capillary pressure in low permeability reservoirs has a significant influence on development indices such as the velocity of displacement front, water breakthrough time, pressure distribution, oil production rate, and recovery degree.关键词
低渗透油藏/动态毛细管压力/静态毛细管压力/毛细管动态系数/非达西渗流/注水/开发指标Key words
low permeability reservoirs/ dynamic capillary pressure/ static capillary pressure/ dynamic capillary coefficient/ non-Darcy flow/ waterflooding/ development index分类
能源科技引用本文复制引用
田树宝,雷刚,何顺利,杨立敏..低渗透油藏毛细管压力动态效应[J].石油勘探与开发,2012,39(3):378-384,7.基金项目
国家科技重大专项"油田开采后期提高采收率新技术"(2011ZX05009-004) （2011ZX05009-004）
