微细多孔结构内两相驱替试验研究

doi:10.3901/JME.2018.16.227

机械工程学报 ›› 2018, Vol. 54 ›› Issue (16): 227-232.doi: 10.3901/JME.2018.16.227

• 交叉与前沿 • 上一篇

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微细多孔结构内两相驱替试验研究

孙川翔¹, 高诚¹, 黄峰²

1. 中国石化石油勘探开发研究院北京 100083;
2. 清华大学能源与动力工程系北京 100084

收稿日期:2017-09-06 修回日期:2018-01-30 出版日期:2018-08-20 发布日期:2018-08-20
通讯作者: 高诚(通信作者),男,1989年出生,博士,高级工程师。主要研究方向为地热系统数值模拟和试验。E-mail:gaocheng.syky@sinopec.com
作者简介:孙川翔,女,1990年出生,工程师。主要研究方向为页岩气勘探开发相关的试验和数值模拟。E-mail:suncx.syky@sinopec.com;黄峰,男,1993年出生,博士研究生。主要研究方向为微尺度多孔介质内的两相流动。E-mail:thuhuangfeng@163.com

Experimental Study on Two Phase Flow in Micro Scale Porous Structure

SUN Chuanxiang¹, GAO Cheng¹, HUANG Feng²

1. Petroleum Exploration and Production Research Institute, SINOPEC, Beijing 100083;
2. Department of Energy and Power Engineering, Tsinghua University, Beijing, 10084

Received:2017-09-06 Revised:2018-01-30 Online:2018-08-20 Published:2018-08-20

摘要/Abstract

摘要： 利用等离子体干法刻蚀硅片制作微细尺度多孔结构模型，采用倒置荧光共聚焦显微镜作为跟踪观测手段，去离子水为润湿相，十二烷为非润湿相构成多组分两相流体。试验研究微细多孔结构内两相驱替规律，发现液桥、锥状液滴、液膜等存在于多孔介质表面的多种形式。试验结果表明：十二烷驱替去离子水的排驱过程中，随着毛细数的增大，十二烷的饱和度逐渐增大。去离子水倾向于以液桥的形式稳定地占据尺寸较小的孔喉部位，十二烷倾向于占据尺寸较大的孔身部位。去离子水驱替十二烷的吸吮过程中，优势通道多集中在微观模型的边壁区域，更容易形成优势通道达到突破状态，从而很快地达到稳定的两相相态分布，十二烷以圆锥状的形式附着在多孔结构圆柱表面，说明圆锥状液滴的存在与初始的饱和相态有关。

关键词: 多孔结构, 两相流, 毛细数, 排驱过程, 吮吸过程, 微细尺度

Abstract: Micro scale porous structure is manufactured through plasma reaction method. The inversed fluorescence microscope is utilized to track and analysis two-phase interface, with deionized water and dodecane designed as wetting phase and non-wetting phase fluid respectively. The reliability of the experimental system is verified and various profiles such as fluid bridge, cone-shaped droplet and fluid film are observed lying on the surface of porous media during the two-phase displacement process. The results showthat:during the drainage process, the saturation of dodecane will increase when the value of Capillary number climbs up. Deionized water tended to occupy the pore throats with smaller size while dodecane is more inclined to take up larger pores. In contrast, during the imbibition progress, the dominant migration pathways are usually distributed at the side wall areas of the micro scale porous structure, which are conducive for the fluid to break though and reach a stable distribution of the two phases. Dodecane stuck to the surface of the porous structure shaped like a cone. Thus, the presence of the cone-shaped droplets are related to the initial saturation phase.

Key words: capillary number, drainage, imbibition, micro scale, porous structure, two phase

中图分类号:

TK14

孙川翔, 高诚, 黄峰. 微细多孔结构内两相驱替试验研究[J]. 机械工程学报, 2018, 54(16): 227-232.

SUN Chuanxiang, GAO Cheng, HUANG Feng. Experimental Study on Two Phase Flow in Micro Scale Porous Structure[J]. Journal of Mechanical Engineering, 2018, 54(16): 227-232.

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微细多孔结构内两相驱替试验研究

Experimental Study on Two Phase Flow in Micro Scale Porous Structure

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