摘要
在低渗透油藏中存在着启动压力梯度,其渗流不再符合达西定律。本文考虑启动压力梯度及毛管力的影响,建立径向水驱油两相渗流微分方程,并利有限差分法进行数值模拟。对于低渗油藏由于启动压力梯度及毛管力的作用,不仅增大了原油的开采难度,而且降低了原油的最终采收率。因此,低渗透油藏强化注水以扩大生产压差,从而改善开发效果。
Because there is a start-up pressure gradient in low-permeability reservoirs,seepage no longer fits Darcy's law.In consideration of the effect of start-up pressure gradient and capillary force,a differential equation of radial waterflooding two-phase seepage is established in the paper.Numerical simulation is carried out with the finite difference method.The effect of start-up pressure gradient and capillary force does not only increase the crude production difficulty but also reduces the ultimate recovery of crude oil.Therefore,water injection is enhanced in low-permeability reservoir to enlarge production pressure difference and improve development effect.
出处
《石油工业计算机应用》
2008年第2期26-27,30,共3页
Computer Applications Of Petroleum
关键词
低渗透油藏
非达西流
油水两相渗流
数值模拟
毛管力
low-permeability reservoir
non-Darcy flow
oil and water two-phase seepage
numerical simulation
capillary force
