石油渗流新的运动形态及其规律

Study on the New Pattern and its Rules of Oil Flow in Porous Media

经过大量的室内实验研究 ,发现石油渗流除了通常的线性达西流和高速紊流外 ,还有 3种新的运动形态 ,他们分别是亚高速、低速及超低速 ,并且在无因次关系曲线上找到这 5种流态相互转化的临界值。这五种流态的数学表达式为 :v=c( ΔpΔl) 1n 。综合运用边界层等理论对这些特殊渗流现象从物理和力学角度进行分析 ,结果与实验完全一致。在以上研究的基础上建立了稳定、不稳定及油水两相所对应的非达西渗流模型 ,分析出非达西对地下油气渗流的影响。本研究对于油田的开发及发展渗流力学均具有一定指导意义。

Through the application of dimensionless analysis, the data of fluid flow in porous media have been plotted to log-log type curve. Based on test of long duration, three new patterns have been found. So add the common two, the pattern of petroleum flow in porous media has five forms:high speed, sub-high speed, linear,low velocity and super low velocity. And the marginal values of them have been obtained. Summarize, all pattern's equation can be described as follow:v=c(ΔpΔl) 1n .The physical and mechanical analysis of all patterns has demonstrated the same conclusion with the experiment. Based on the new nonlinear flow theory, we build steady state flow, transient flow and two-phase flows. Several important results were presented that the new patterns of non-Darcy flow. The conclusion proposed here is of importance for non-Darcy fluid mechanics and oilfield development.