分支通道内液-液自发渗吸规律研究

doi:10.19596/j.cnki.1001-246x.8330

计算物理 ›› 2021, Vol. 38 ›› Issue (5): 543-554.DOI: 10.19596/j.cnki.1001-246x.8330

所属专题：多孔介质毛细动力学研究

• 专题：多孔介质毛细动力学研究 • 上一篇下一篇

分支通道内液-液自发渗吸规律研究

郑江韬¹(), 贾宁洪², 胡慧芳³, 杨勇³, 鞠杨¹, 王沫然⁴^,*()

1. 中国矿业大学(北京)煤炭资源与安全开采国家重点实验室, 北京 100083
2. 中国石油勘探开发研究院提高石油采收率国家重点实验室, 北京 100083
3. 中国石油化工股份有限公司胜利油田分公司勘探开发研究院, 山东东营 257015
4. 清华大学工程力学系, 北京 100084

收稿日期:2021-01-15 出版日期:2021-09-25 发布日期:2022-03-24
通讯作者: 王沫然
作者简介:郑江韬(1989-), 男, 博士, 副教授, 主要从事多相渗流研究, E-mail: zhengjt@cumtb.edu.cn
基金资助:
国家自然科学基金(51904307);国家重点研发项目(2019YFA0708704);科技部创新团队项目(2016RA4067)

Study on Liquid-Liquid Spontaneous Imbibition Dynamics in Bifurcated Channels

Jiangtao ZHENG¹(), Ninghong JIA², Huifang HU³, Yong YANG³, Yang JU¹, Moran WANG⁴^,*()

1. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology, Beijing 100083, China
2. State Key Laboratory of Enhanced Oil Recovery, PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China
3. Shengli Research Institute of Petroleum Exploration and Development, SinoPec, Dongying, Shandong 257015, China
4. Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China

Received:2021-01-15 Online:2021-09-25 Published:2022-03-24
Contact: Moran WANG

摘要/Abstract

摘要：

自发渗吸过程中两相界面在分支通道内的破裂和汇合为强非稳态过程, 难以用经典理论及常规数值计算方法准确描述。本文采用格子玻尔兹曼方法研究孔隙结构分支通道基本单元内的液-液自发渗吸行为, 对比出入口通道大小、两相黏度差异对液-液自发渗吸行为的影响。入口通道的大小对两相界面破裂进入分支通道内的竞争自发渗吸行为起控制作用, 而两相流体黏度控制了自发渗吸整体行为。本研究为复杂孔隙结构内液-液自发渗吸行为定量表征提供研究基础。

关键词: 自发渗吸, 毛细管力, 两相流, 多孔介质, 格子玻尔兹曼方法

Abstract:

We investigated spontaneous imbibition behavior in a basic bifurcated channel. The rupture and convergence of the two-phase interface in a bifurcated channel is strongly unsteady, which is hard to be described accurately with classical theories and conventional numerical calculation methods. An improved two-component pseudopotential lattice Boltzmann method was employed in simulating the unsteady spontaneous process. It shows that the width of inlet/outlet channel controls the competitive imbibition behavior in the bifurcated channel. Whereas the viscosity ratio between the wetting phase and the non-wetting phase controls the overall spontaneous imbibition behavior. The results provide a basis for quantitative characterization of spontaneous imbibition in complex pore structures.

Key words: spontaneous imbibition, capillary pressure, two-phase flow, porous media, lattice Boltzmann method

中图分类号:

P313.1

郑江韬, 贾宁洪, 胡慧芳, 杨勇, 鞠杨, 王沫然. 分支通道内液-液自发渗吸规律研究[J]. 计算物理, 2021, 38(5): 543-554.

Jiangtao ZHENG, Ninghong JIA, Huifang HU, Yong YANG, Yang JU, Moran WANG. Study on Liquid-Liquid Spontaneous Imbibition Dynamics in Bifurcated Channels[J]. Chinese Journal of Computational Physics, 2021, 38(5): 543-554.

图/表 13

图1 表面张力计算

Fig.1 Calculation of surface tension

图2 接触角的计算

Fig.2 Calculation of contact angle

图3 二维直通道内的流体自发渗吸模型

Fig.3 2D straight channel capillary rise model

图4 双组分SC-LBM自发渗吸程序验证

Fig.4 Validation of the SC-LBM in simulating spontaneous imbibition

图5 分支状通道示意图

Fig.5 Bifurcation capillary rise model

表1 SC-LBM计算中所采用的参数

Table 1 Parameters used in the SC-LBM simulation

G	τ^k	τ	ρ^k	ρ^{${\rm{\bar k}}$}	β
3.6	0.6	0.6	0.97	0.97	-0.25

图6 出入口宽度(H)对分支通道内自发渗吸过程中两相界面运移的影响

Fig.6 Influence of width of inlet/outlet channel (H) on spontaneous imbibition behavior

图7 出入口宽度(H)对分支通道内自发渗吸速度的影响

Fig.7 Spontaneous imbibition velocity in the inlet channel, small channel, big channel, and outlet channel

图8 出入口宽度(H)对分支通道内自发渗吸压力的影响

Fig.8 Capillary pressure and pressure difference in the inlet channel, small channel, big channel, and outlet channel

表2 不同黏度比SC-LBM计算中所采用的参数

Table 2 Parameters used in the SC-LBM simulation of different viscosity ratio cases

G	τ^k	τ^{${\rm{\bar k}}$}	ρ^k	ρ^{${\rm{\bar k}}$}	β
3.6	0.8	30.5, 3.5, 0.8, 0.53, 0.503	0.97	0.97	-0.25

图9 不同黏度比(M)条件下分支通道内自发渗吸两相界面运移行为

Fig.9 Influence of viscosity ratio (M) on the spontaneous imbibition behavior

图10 不同黏度比(M)条件下分支通道内自发渗吸速率

Fig.10 Spontaneous imbibition velocity in the inlet channel, small channel, big channel, and outlet channel

图11 不同黏度比(M)条件下自发渗吸过程中分支通道内压力变化

Fig.11 Capillary pressure and pressure difference in the inlet channel, small channel, big channel, and outlet channel

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分支通道内液-液自发渗吸规律研究

Study on Liquid-Liquid Spontaneous Imbibition Dynamics in Bifurcated Channels

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