Effect of fluid slippage on eddy growth and non-Darcian flow in rock fractures
Effect of fluid slippage on eddy growth and non-Darcian flow in rock fractures
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流体滑移对岩石裂隙涡流增长和非达西流的影响
DOI：
10.1016/j.jhydrol.2019.124440
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发表时间：
2020-02
影响因子：
6.4
通讯作者：
Wang Liangqing
中科院分区：
文献类型：
--
作者：
Zhou Jia-Qing;Wang Lichun;Li Changdong;Tang Huiming;Wang Liangqing
岩石裂隙中的流体流动通常是在无滑移边界条件（BC）的前提下进行理论和数值研究的。然而，在某些情况下，岩石表面的流体滑移自然存在，这可能导致违反无滑移BC。滑动BC如何以及在多大程度上影响非达西裂缝流动仍然缺乏约束。本文系统地研究了压力梯度递增条件下岩石裂隙中的滑流行为。由于流体滑移，影响表观渗透率（k）的两种竞争机制被揭示：k不仅被裂缝壁处的流体滑移增强，而且被由于增强的速度场而加速的涡流增长减小。在这个竞争过程中，由滑动速度引起的增量墨水最初主导于由涡流增长引起的减量，但如果压力梯度足够大且涡流充分发展，这种主导情况可能会逆转。此外，滑流体的流动行为被测试是非常敏感的滑移长度的基础上，我们的敏感性分析。因此，对滑移长度的合理估计对于准确确定流体滑移的影响至关重要。该研究加深了我们对滑动BC存在时岩石裂缝中流体流动的认识，并可能为裂缝性储层中有机污染修复、石油开采和地质碳封存提供理论指导。
Fluid flow in rock fractures is usually theoretically and numerically investigated on the premise of no-slip boundary condition (BC). However, fluid slippage at rock surface is naturally present in some circumstances that might lead to a violation of no-slip BC. How and to what extent slip BC affects non-Darcian fracture flow remains poorly constrained. This study systematically investigated the slippery flow behaviors in rock fractures under sequentially-increasing pressure gradients. Two competing mechanisms impacting the apparent permeability (k) due to fluid slippage were revealed:kwas not only enhanced by fluid slippage at fracture walls but also was reduced by the accelerated eddy growth due to enhanced velocity field. The increment inkcaused by slip velocity initially dominated over the decrement caused by eddy growth during this competing process, but this dominant situation could reverse given a sufficiently large pressure gradient with fully-developed eddies. Moreover, the slippery fluid flow behavior was tested to be very sensitive to the slip length based on our sensitivity analysis. Therefore, a reasonable estimation of the slip length would be crucial to accurately determine the effects of fluid slippage. This study deepens our understanding of fluid flow in rock fractures when slip BC is present, and might provide theoretical guidance for organic pollution remediation, oil recovery, and geological carbon sequestration in fractured reservoirs.
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影响因子：
5.4
作者：
Jia‐Qing Zhou;Lichun Wang;Yi‐Feng Chen;M. Cardenas
通讯作者：
Jia‐Qing Zhou;Lichun Wang;Yi‐Feng Chen;M. Cardenas
影响因子：
5.2
作者：
Seung Hyun Lee;K. Lee;I. Yeo
通讯作者：
Seung Hyun Lee;K. Lee;I. Yeo
影响因子：
2.4
作者：
Cheng, JT;Giordano, N
通讯作者：
Giordano, N
影响因子：
2.4
作者：
Zi Li;S. Galindo‐Torres;A. Scheuermann;Ling Li
通讯作者：
Zi Li;S. Galindo‐Torres;A. Scheuermann;Ling Li
影响因子：
3.9
作者：
BROCHARD, F;DEGENNES, PG
通讯作者：
DEGENNES, PG