油气地质与采收率2013，Vol.20Issue(2)：74-76,3.
特低渗透多层油藏水驱前缘研究
Study on water-oil frontal edge for ultra-low permeability multilayer reservoir
摘要
Abstract
Difference of physical property of each stratum can cause different advancing velocity of water-oil frontal edge during the waterflooding stage in ultra-low permeability multilayer reservoir. Using seepage theory of ultra-low permeability multilayer reservoir, considering threshold pressure gradient for oil and water, a theoretical model is established and the formula of water-oil frontal edge is deduced. In addition, the influence of permeability differential, injection-production differential pressure, injection-production well spacing and oil viscosity on the water-oil frontal edge is also analyzed. Considering the influence of injection-production well spacing, the dimensionless water-oil frontal edge is first proposed. The result shows that: The greater the permeability differential, the slower the advancing velocity of water-oil frontal edge for the lower stratum; with the increase of the injection-production differential pressure, the advancing velocity of water-oil frontal edge for the lower stratum is becoming faster, but the amplitude increment is becoming smaller; with the increase of the injection-production well spacing, the distance of water-oil frontal edge for the lower stratum is becoming longer, but the dimensionless water-oil frontal edge is becoming smaller; with the decrease of oil viscosity, the advancing velocity of water-oil frontal edge for the lower stratum is becoming faster, and the amplitude increment is becoming larger.关键词
特低渗透/多层油藏/水驱前缘/启动压力梯度/渗透率级差/注采压差/注采井距Key words
ultra-low permeability/ multilayer reservoir/ water-oil frontal edge/ threshold pressure gradient/ permeability differential/ injection-production differential pressure/ injection-production well spacing/ oil viscosity分类
能源科技引用本文复制引用
徐庆岩,杨正明,何英,于荣泽,晏军..特低渗透多层油藏水驱前缘研究[J].油气地质与采收率,2013,20(2):74-76,3.基金项目
国家科技重大专项"特低渗透油藏有效补充能量开发技术"(2008ZX05000-013-02),国家油气重大专项"特低渗透油藏有效开发技术"(2011ZX0513-006). （2008ZX05000-013-02）
