理论与试验研究

致密砂砾岩裂隙粘性流体流动特性研究

  • 卢才武 ,
  • 罗信天 ,
  • 章赛 ,
  • 江松 ,
  • 孙怡潇
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  • 1.西安建筑科技大学 资源工程学院,西安 710055;
    2.西安市智慧工业感知、计算与决策重点实验室 西安 710055
卢才武(1965—),男,湖北仙桃人,博士,教授、博士生导师,主要从事矿山安全管理及生产智能化关键技术研究。E-mail:lucaiwu@126.com
章赛(1991—),男,西安人,博士,主要从事灾害监测预警与安全管理方向的研究。E-mail:909647516@qq.com

收稿日期: 2024-10-18

  网络出版日期: 2025-09-03

基金资助

国家自然科学基金(51974233,52304151);陕西省自然科学基金(2023-JC-QN-Q0513)

The Flow Characteristics of Fractured Viscous Fluids in Dense Conglomerates

  • Lu Caiwu ,
  • Luo Xintian ,
  • Zhang Sai ,
  • Jiang Song ,
  • Sun Yixiao
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  • 1. School of Resource Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, P.R. China;
    2. Key Laboratory of Perception, Computing and Decision Making for Intelligent Industry, Xi'an 710055, P.R. China

Received date: 2024-10-18

  Online published: 2025-09-03

摘要

利用地下空间存储石油受裂隙的影响,将该问题简化为单裂隙渗流问题,引入雷诺数Re,借助3D打印技术,开展物理模型试验,探讨不同注入流速梯度下流体动力粘度μ以及裂隙开度bi对于流体流动特性与压力梯度J的影响规律。结果表明:裂隙开度bi影响到其渗流达到的稳定时间,而流体动力粘度μ对渗流压力影响较大;对数据进行拟合发现裂隙开度bi与压力梯度J呈指数函数关系,随bi增加呈现出下降趋势,同时,雷诺数Re减小,流体过流能力减弱;流体动力粘度μ与压力梯度J则呈现出幂函数的关系,Jμ的增加而增加,揭示了压力梯度随流体动力粘度的演化规律,说明流体流入裂隙时受到的阻力增加,流入较为困难;裂隙开度与流体动力粘度对流体在裂隙渗流上有不同程度的阻碍作用,多因素影响下过流能力减弱,可能发生堵塞;在地下水环境下,可以做到在一定高度下的石油存储,表明在不进行封堵措施的情况下,类石油的粘性液体在含微小裂隙的地下空间中存储存在可能。

本文引用格式

卢才武 , 罗信天 , 章赛 , 江松 , 孙怡潇 . 致密砂砾岩裂隙粘性流体流动特性研究[J]. 地下空间与工程学报, 2025 , 21(4) : 1161 -1172 . DOI: 10.20174/j.JUSE.2025.04.07

Abstract

The use of underground space to store oil is affected by fractures, which is simplified to a single-fracture seepage problem. Introducing the Reynolds number Re and using 3D printing technology, physical model tests are conducted to explore the influence of the hydrodynamic viscosity μ and the fracture aperture bi on the fluid flow characteristics and pressure gradient J under different injection flow rate gradients. The results show that: The fracture aperture bi affects the stabilization time of the seepage, while the hydrodynamic viscosity μ has a greater impact on the seepage pressure. After fitting the data, it is found that the fracture aperture bi has an exponential function relationship with the pressure gradient J, which shows a downward trend as bi increases. At the same time, the Reynolds number Re decreases, and the fluid flow capacity weakens; the hydrodynamic viscosity μ and the pressure gradient J show a downward trend. According to the relationship of the power function, J increases with the increase of μ, which reveals the evolution law of pressure gradient with hydrodynamic viscosity, indicating that the resistance of fluid flowing into the fracture increases and the inflow is more difficult. The fracture aperture and hydrodynamic viscosity have varying degrees of obstruction to fluid seepage in the fracture. Under the influence of multiple factors, the flow capacity is weakened, and blockage may occur. In a groundwater environment, oil can be stored at a certain height, indicating that it is possible to store petroleum-like viscous liquids in underground spaces containing tiny fractures without sealing measures.

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