西安石油大学学报（自然科学版）2024，Vol.39Issue(3)：65-71,81,8.DOI:10.3969/j.issn.1673-064X.2024.03.008
受限水在纳米级多孔介质页岩中的非稳态流动特征
Unsteady Flow Characteristics of Confined Water in Nano Porous Shale
张鹏 1曹成 2杨建松2
作者信息
- 1. 陕西榆林能源集团有限公司 科技信息部,陕西 榆林 719000
- 2. 陕西理工大学 数学与计算机科学学院,陕西 汉中 723001
- 折叠
摘要
Abstract
In order to investigate the unsteady flow characteristics of water in nanotube and the unsteady seepage characteristics of water in nanoscale porous shale,the unsteady flow enhancement model of water in nanotubes and the unsteady apparent liquid permeability(ALP)model of water in mixed wetting porous media were established by combining the unsteady theory with the mechanism of water transport in nanoscale pores.The influences of tube diameter and wettability on the flow of water in single nanotube and the time for the flow to reach stability,as well as the influences of non-homogeneous distribution of pore diameter of nanoporous media on its ALP and the time for the seepage to reach stability were analyzed.The results show that the time required for water flow to reach steady state in single nanotube is strongly related to the wettability.Under hydrophilic conditions,the time for water flow to reach stability is relatively short,and the influence of contact angle on stability time is minimal;But under hydrophobic conditions,the time for water flow to reach stability increases exponentially,and the influence of contact angle on stability time significantly increases.The effect of the average pore size of the porous medium on the ALP and stability time is more sensitive than the deviation coefficient.In the nonsteady state stage,the influence of wettability and pore size heterogeneity on ALP is not significant.As the water flow gradually stabilizes,the influence of the above parameters on ALP becomes more significant.The unsteady ALP model can simultaneously describe the flow characteristics of both unsteady and steady stages of water flow,which is an important supplement to steady ALP.关键词
非稳态流动/纳米孔/受限水/流量增强/表观液体渗透率Key words
unsteady flow/nanopore/confined water/flow enhancement/apparent liquid permeability分类
能源科技引用本文复制引用
张鹏,曹成,杨建松..受限水在纳米级多孔介质页岩中的非稳态流动特征[J].西安石油大学学报（自然科学版）,2024,39(3):65-71,81,8.
