孔隙介质中稠油流体非线性渗流方程

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基金项目: 中石化科技攻关项目“稠油水驱蒸汽驱提高采收率技术研究

Nonlinear flow equations for heavy oil in porous media

1.
School of Petroleum Engineering in China University of Petroleum, Dongying 257061, China
2.
Institute of Porous Flow and Fluid Mechanics Chinese Academy of Sciences, Langfang 065007, China
3.
Geological Scientific Research Institute of Shengli Oilfield Company Ltd., Dongying 257015, China

摘要: 为揭示稠油流体在油藏孔隙中渗流特性，基于力学平衡方程，建立了描述稠油流体渗流特征的非线性渗流方程，对油藏孔隙中稠油渗流过程及启动机理进行了深入分析，着重分析了边界层、流体屈服应力以及表面力对渗流过程的影响.结果表明，Hagen-Poiseuille定律需经修正方能描述稠油流体流动，边界层、流体屈服应力以及表面力对稠油渗流影响非常显著.孔隙中，稠油启动压力梯度来源于其屈服应力、表面力，边界层加剧了渗流非线性程度，实际稠油油藏开发中，要充分掌握稠油渗流非线性特征.
- 屈服应力
Abstract: The gas flowcharacteristic in an adsorbent bed is a vital problem for furtherstudying the mechanics of gas separation process. In this paper, acomprehensive mathematical model of gas flow and adsorption in anadsorbing bed, which based on mass and momentum conservation law,is established. A typical cyclic process of an axial-flow rapidpressure swing adsorption is numerically studied. The flowpatterns in different cyclic period for pressurization,adsorption, depressurization, desorption and purge, are obtained.The flow characteristics and their difference from the gas flow inan empty bed and a no-adsorption bed are also studied.
- yield stress