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科技导报  2015 

基于水动力学理论的微观流动单元渗流数学模型

DOI: 10.3981/j.issn.1000-7857.2015.08.010, PP. 63-67

Keywords: 微观流动单元,渗流数学模型,流动单元划分,平面流动特征

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Abstract:

为了研究非均质油藏内部渗流规律,反映不同开发阶段地层中流体流动规律及分布特征,揭示流场变化与储层特征间的内在联系。本文基于水动力学原理及流线簇方程,提出储层中波及范围内具有相似流动规律及储层特征的渗流区域为微观流动单元,建立流量贡献率、流动单元流量非均匀分布曲线和流量强度差异系数渗流数学模型,通过流动单元的区域流量对总产量贡献的大小进行划分,建立流动单元高速流动区与低速流动区的划分准则。通过对五点井网一个注采单元的模拟,结合流线簇方程进行表征,结果表明,高速流动区能量充足,其占整个流动单元面积的53.7%,提供了总流量的61.7%,为流量的主要贡献区域;低速流动区域占整个流动单元总面积的46.3%,只提供了总流量的38.3%。

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