IMECH-IR  > 流固耦合系统力学重点实验室
张召彬1; 林缅2; 李晓1
Source Publication矿物岩石地球化学通报
Other 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的迂曲度改变。; Flow path tortuosity,which is of great significance to productivity forecast,is an important parameter in characterization of the transport process in porous media. However,due to the nonlinearity of flow in tight reservoirs,flow properties in tight reservoirs are remarkably different with those in the regular reservoirs,thus is the tortuosity. We studied the change of tortuosity caused by the nonlinearity of flow using a pore network model. Two dimensionless numbers were introduced: one is the dimensionless tortuosity,Γ,which is defined based on hydraulic tortuosity to quantify the change of tortuosity due to the nonlinearity of flow in tight reservoir; another is the dimensionless pressure gradient,Ρ,which is defined on the basis of the flux-weighted throat radius to quantify the state of pressure gradient. The dependency of Γ with Ρ was systematically studied. The Ρ-Γ curve was found to have a fix shape and was irrelevant with any parameters of the core. The result implied that,the change of tortuosity caused by the nonlinearity of flow in tight reservoir is only a function of dimensionless pressure gradient. The change of tortuosity can be calculated directly by the fitting formula of Ρ-Γ curve presented in this work.
Keyword致密储集层 迂曲度 孔隙网络模型 Bingham 流体
Indexed ByCSCD
Funding Organization国家973计划 ; 中国科学院战略性先导科技专项(B类) ; 国家重大科技专项 ; 国土资源部中国地质调查局地质大调查项目
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Cited Times:1[CSCD]   [CSCD Record]
Document Type期刊论文
Corresponding Author林缅
Recommended Citation
GB/T 7714
张召彬,林缅,李晓. 致密油储集层迂曲度变化特征研究[J]. 矿物岩石地球化学通报,2015,34(1):55-60.
APA 张召彬,林缅,&李晓.(2015).致密油储集层迂曲度变化特征研究.矿物岩石地球化学通报,34(1),55-60.
MLA 张召彬,et al."致密油储集层迂曲度变化特征研究".矿物岩石地球化学通报 34.1(2015):55-60.
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