孔隙特性参数对排驱过程影响的实验研究

doi:10.11949/j.issn.0438-1157.20171502

化工学报 ›› 2018, Vol. 69 ›› Issue (8): 3436-3442.DOI: 10.11949/j.issn.0438-1157.20171502

孔隙特性参数对排驱过程影响的实验研究

马斌^1,2, 马跃征¹, 史琳¹

1 清华大学能源与动力工程系工程热物理研究所, 北京 100081;
2 兰州交通大学机电工程学院, 甘肃兰州 730070

收稿日期:2017-11-09 修回日期:2018-04-24 出版日期:2018-08-05 发布日期:2018-08-05
通讯作者: 史琳
基金资助:
国家自然科学基金面上项目（51236004）；国家自然科学基金创新团队项目（51621062）。

Experimental study on pore characters effect on drainage process

MA Bin^1,2, MA Yuezheng¹, SHI Lin¹

1 Institute of Engineering Thermo-physics, Department of Energy and Power Engineering, Tsinghua University, Beijing 100081, China;
2 School of Mechanical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, Gansu, China

Received:2017-11-09 Revised:2018-04-24 Online:2018-08-05 Published:2018-08-05
Supported by:
supported by the National Natural Science Foundation of China (51236004, 51621062).

摘要/Abstract

摘要：

两相宏观排驱特性是由微观孔隙尺度排驱特性决定的，而微观孔隙尺度多孔介质又处处不均匀、各向不均匀。为了研究孔隙尺度孔隙结构特征对驱替特性的影响，采用了独特设计的微多孔实验段，固定骨架圆柱间距离而变动驱替流体可流通方向，在此基础上研究了孔隙结构特征对驱替特性的影响。对于孔隙特性的表征采取了孔隙方向、关键比率（最大孔隙尺度与最小孔喉尺度比值）、迂曲度和孔隙率四个参数。结果表明：同流量时，微多孔结构的孔隙角越大、迂曲度越小，则对应的非浸润相（十二烷和十六烷）的饱和度（驱替效率）越高；对于不同流量，所有的微多孔结构都按照流量越大，则非浸润相（十二烷和十六烷）饱和度越高的规律变化；关键比率和孔隙率影响必须结合孔隙结构来判断；孔隙角、流量相同时，两相黏度接近的驱替效率更高。

关键词: 排驱特性, 孔隙角, 关键比率, 迂曲度

Abstract:

Macro drainage characters were determined by micro drainage features in pore scale. They are inhomogeneous everywhere in different directions. Three distinctive Hele-Shaw cells were designed to study the effects of pore structure on drainage process. The pore structure characters were elucidated by several parameters including pore angle, critical ratio (the ratio of the max pore diameter to the min throat size), tortuosity and porosity. The results show that when displacement velocity is the same, larger pore angle or smaller tortuosity results in greater non-wetting phase (dodecane and hexadecane) saturation; when displacement velocity is not the same, larger displacement velocity makes greater non-wetting phase saturation. Critical ratio and porosity are not the decisive factors; their effects on drainage process are evaluated by their values and other pore structure parameters, such as pore angle and so on. When pore angle and displacement velocity are the same, smaller viscosity ratio pairs tend to have a higher drainage effect.

Key words: drainage character, pore angle, critical ratio, tortuosity

中图分类号:

TE311

马斌, 马跃征, 史琳. 孔隙特性参数对排驱过程影响的实验研究[J]. 化工学报, 2018, 69(8): 3436-3442.

MA Bin, MA Yuezheng, SHI Lin. Experimental study on pore characters effect on drainage process[J]. CIESC Journal, 2018, 69(8): 3436-3442.

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孔隙特性参数对排驱过程影响的实验研究

Experimental study on pore characters effect on drainage process

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