Correlation between pressure gradient and phase saturation for oil‐water flow in smooth‐ and rough‐walled parallel‐plate models
Correlation between pressure gradient and phase saturation for oil‐water flow in smooth‐ and rough‐walled parallel‐plate models
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DOI：
10.1029/2007wr006043
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发表时间：
2008-02
影响因子：
5.4
通讯作者：
R. Wong;X. Pan;B. Maini
中科院分区：
文献类型：
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作者：
R. Wong;X. Pan;B. Maini
本研究旨在通过平行板（单裂缝）模型研究油水混合物流动中的压力梯度/相饱和度相关性。研究发现，相关性取决于两种流动流体或流动模式之间的相互作用，而流动模式又受注入方法、水流量、粘度比、裂缝孔径和裂缝表面粗糙度控制。确定了三种不同的流动模式，即通道流、分散流和混合流。压力梯度和相饱和度的测量表明，广泛使用的Romm相对渗透率关系适用于油相和水相在裂缝中连续的河道流动。对于油相或水相不连续的分散流或混合流，为管道中的气液流开发的Lockhart-Martinelli型关联式在低粘度比下有效，但在高粘度比和水流量下无效。
The present study is aimed at an investigation of the pressure gradient/phase saturation correlation in the flow of an oil‐water mixture through a parallel‐plate (single fracture) model. It was found that the correlation depends on the interaction between the two flowing fluids, or flow pattern, which is in turn governed by the injection method, water flow rate, viscosity ratio, fracture aperture, and fracture surface roughness. Three distinct flow patterns were identified, namely, channel, dispersed, and mixed flows. Measurements of pressure gradient and phase saturation suggest that the widely used Romm's relative permeability relationship is applicable to channel flow in which oil and water phases are continuous in the fracture. For dispersed or mixed flow in which either the oil or water phase is discontinuous, a Lockhart‐Martinelli type correlation developed for gas‐liquid flow in pipes should be valid at low viscosity ratio but not at high viscosity ratio and water flow rate.