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首页> 外文期刊>Environmental earth sciences >Impact of single inclined faults on the fluid flow and heat transport: results from 3-D finite element simulations
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Impact of single inclined faults on the fluid flow and heat transport: results from 3-D finite element simulations

机译：单个倾斜断层对流体流动和传热的影响：3-D有限元模拟的结果

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The impact of inclined faults on the hydro-thermal field is assessed by adding simplified structural settings to synthetic models. This study is innovative in carrying out numerical simulations because it integrates the real 3-D nature of flow influenced by a fault in a porous medium, thereby providing a useful tool for complex geothermal modelling. The 3-D simulations for the coupled fluid flow and heat transport processes are based on the finite element method. In the model, one geological layer is dissected by a dipping fault. Sensitivity analyses are conducted to quantify the effects of the fault's transmissivity on the fluid flow and thermal field. Different fault models are compared with a model where no fault is present to evaluate the effect of varying fault transmissivity. The results show that faults have a significant impact on the hydrothermal field. Varying either the fault zone width or the fault permeability will result in relevant differences in the pressure, velocity and temperature field. A linear relationship between fault zone width and fluid velocity is found, indicating that velocities increase with decreasing widths. The faults act as preferential pathways for advec-tive heat transport in case of highly transmissive faults, whereas almost no fluid may be transported through poorly transmissive faults.
机译：通过向合成模型中添加简化的结构设置，可以评估倾斜断层对热液场的影响。这项研究在进行数值模拟方面具有创新性，因为它整合了受多孔介质中断层影响的流动的真实3-D性质，从而为复杂的地热建模提供了有用的工具。耦合的流体流动和传热过程的3-D模拟基于有限元方法。在该模型中，一个地质层被一个倾覆断层剖开。进行敏感性分析以量化故障的透射率对流体流动和热场的影响。将不同的故障模型与不存在故障的模型进行比较，以评估变化的故障透射率的影响。结果表明，断层对热液场有重要影响。改变断层带宽度或断层渗透率将导致压力，速度和温度场的相关差异。发现断层带宽度与流体速度之间存在线性关系，这表明速度随宽度减小而增加。在高传输断层的情况下，这些断层作为对流热传输的优先通道，而几乎没有流体可以通过低传输断层进行传输。

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