摘要
忽略孔、洞、缝的具体形式,从宏观角度,建立了以Navier-Stokes方程为控制方程的流体流动模型,对不同尺度复杂储集空间内流体的流动特征进行研究.研究结果显示:阻力因子同雷诺数的双对数曲线上可分为线性流区、过渡区和阻力平方区.这种模式同管流、渗流类似.结果表明:缝洞型储层内既存在线性流也存在非线性流,但以非线性流为主;用渗透率对缝洞介质进行表征存在适用条件;相同压力梯度下,流动通道尺度越大,黏度越小,非线性流发生的概率越高;缝洞型储层内流体的流动同渗流、管流存在密切联系.
The fluid flow in different scale pathways was studied from the macro point of view without considering storage space types,porosity,fracture or cave through Navier-Stokes mathematic model. Results showed that the log-log plot of Resistance Coefficient vs Reynolds Number can be divided into three segments:Linear Flow Region,Transition Region and Square Law Region,which is similar to that of seepage and pipe flow. Analysis leads to the conclusions that (1) both linear and nonlinear flow occur in fracture-cave reservoir,however,nonlinear flow is more common,(2) permeability cannot be used to describe the hydraulic characteristics of the fracture-cave reservoir effectively,(3) given the same pressure gradient,the larger size of the pathways,the lower viscidity and the higher probability for nonlinear flow to occur,(4) flow in fracture-cave reservoir has a close relationship with seepage and pipe flow.
出处
《大庆石油学院学报》
CAS
北大核心
2009年第6期68-71,76,共5页
Journal of Daqing Petroleum Institute
基金
国家"973"重点基础研究发展计划项目(2006CB202400)
关键词
缝洞型介质
流动特征
线性流
非线性流
fracture-cave medium
flow characteristics
linear flow
non-linear flow
