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致密油储集层迂曲度变化特征研究
Authors
张召彬
李晓
林缅
Publication date
1 January 2015
Publisher
Abstract
迂曲度是刻画多孔介质中输运过程的重要参数,对致密储集层,由于流动的非线性,流动规律和常规储集层有巨大差异,迂曲度与常规储集层亦不同。本文利用孔隙网络模型,研究了由流动非线性所带来的迂曲度改变。提出2个无量纲数:1以岩心的水动力迂曲度为基础定义无量纲迂曲度Γ,用以刻画非线性效应带来的迂曲度改变;2定义流量加权平均的孔喉半径为特征孔喉半径,并以此定义无量纲压力梯度Ρ,用以刻画压力梯度状态。本文研究了Γ随Ρ的变化规律表明,Ρ-Γ曲线具有确定的形态,且不随岩心孔隙网络的任何参数发生变化。即对于任何岩石,由流动的非线性所带来的迂曲度的改变是确定的。本文给出了Ρ-Γ曲线的拟合公式,可方便计算给定压力梯度下..
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Institute Of Mechanics,Chinese Academy of Sciences
See this paper in CORE
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oai:dspace.imech.ac.cn:311007/...
Last time updated on 12/02/2018
Institute Of Mechanics,Chinese Academy of Sciences
See this paper in CORE
Go to the repository landing page
Download from data provider
oai:dspace.imech.ac.cn:311007/...
Last time updated on 12/02/2018
Institute Of Mechanics,Chinese Academy of Sciences
See this paper in CORE
Go to the repository landing page
Download from data provider
oai:dspace.imech.ac.cn:311007/...
Last time updated on 25/11/2020