特种油气藏2011，Vol.18Issue(6)：92-95,4.
低渗透油藏油水两相非线性渗流规律
摘要
Abstract
With the development of low permeability oil and gas reservoirs, the flow issue regarding the kickoff pressure gradient and stress sensitivity has drawn more and more popular attention. The pressure distribution pattern of oil - water two - phase flow in low permeability reservoirs has not been sufficiently studied and the calculation of oil - water two - phase production has not been accurate. In this paper, an oil - water two - phase radial steady state flow model considering the kickoff pressure gradient and stress sensitivity has been established with a consideration of the uneven radial distribution of water saturation in the reservoir after the breakthrough of the waterflood front in oil wells. A pressure distribution equation and a production equation were then derived. The calculation results indicated that in oil - water two - phase low permeability reservoirs, the formation pressure drop increased with the increase of the kickoff pressure gradient and decreased with the increase of the stress sensitivity coefficient while the production of oilwells decreased with the increase of the kickoff pressure gradient and the stress sensitivity. The research results will provide a theoretical basis for the development of low permeability oil - water two - phase reservoirs.关键词
低渗透油藏/非线性渗流/启动压力梯度/应力敏感/压力分布/产量Key words
low permeability reservoir/ nonlinear flow/ kickoff pressure gradient/ stress sensitivity/ pressure distribution/ production分类
能源科技引用本文复制引用
田敏,李晓平,李楠,陈凤..低渗透油藏油水两相非线性渗流规律[J].特种油气藏,2011,18(6):92-95,4.基金项目
教育部高等学校博士学科点专项科研基金"三维大变化尺度缝洞型碳酸盐岩油藏复杂油水两相流动规律研究"(20105121110006) （20105121110006）
