| 低渗透非达西渗流综合判据初探 |
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| 引用本文： | 阮敏,何秋轩.低渗透非达西渗流综合判据初探[J].西安石油大学学报(自然科学版),1999(4). |
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| 作者姓名： | 阮敏 何秋轩 |
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| 作者单位： | 西安石油学院石油工程系 |
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| 摘 要： | 低渗透多孔介质的非达西渗流的判别问题是渗流力学研究的一个新课题，它对合理开发低渗透油田有着十分重要的意义．低渗透多孔介质中的渗流表现出对线性的偏离，呈现为具有拟启动压力梯度的非达西渗流形式．为了确定该渗流形式出现的条件，在实验研究的基础上，针对引起非达西渗流的主要作用机制，如流体粘度、介质渗流率、孔隙几何结构等进行了讨论，运用因次分析方法，提出了一个综合判据——压力数（λＮ）．研究表明：当λＮ＞５时，低渗多孔介质中的渗流表现为非达西流特征；当λΝ＜２时，其渗流表现为达西流特征；λＮ在２～５视为过渡带．
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| 关 键 词： | 低渗透油气藏 非达西流 综合判据 压力数 |
A Study of the Overall Criterion for Judging the Nondarcy Flow Through Low Permeability
Porous Media |
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| Ruan Min et al.A Study of the Overall Criterion for Judging the Nondarcy Flow Through Low Permeability
Porous Media[J].Journal of Xian Shiyou University,1999(4). |
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| Authors: | Ruan Min |
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| Abstract: | Judgement of the nondarcy flow through low permeability porous media is a new
topic in he research of seepage folw mechanics.It is of importance to the reasonable
development of low permeability oil fields.The flow through the media deviates from
linearity,and displays the nondarcy flow with pseudostartup pressure gradient.A great number
of experiments were made to determine the condition of displaying the flow.The main
parameters causing the nondarcy flow,such as liquid viscosity,media permeability,pore
geometry structure,etc are studied by dimensional analysis method,and an overall
criterionpressure number is N put forward.When N>5,the flow displays nondarcy flow;when
N<2,it shows Darcy flow;when 2
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| Keywords: | low permeability pools Nondarcy flow overall criterion pressure number |
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