Numerical study on the effects of fracture parameters on permeability in fractured rock with extremely low matrix permeability
Numerical study on the effects of fracture parameters on permeability in fractured rock with extremely low matrix permeability
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DOI：
10.1007/s40328-021-00341-9
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发表时间：
2021-05
影响因子：
1.4
通讯作者：
Guiwu Chen;Lei Song;Wenliang Zhang
中科院分区：
文献类型：
--
作者：
Guiwu Chen;Lei Song;Wenliang Zhang
了解裂缝岩石的渗透率可以在流体流动和质量输运建模的发展方面取得重大进展。本文研究了裂缝数量、长度和孔径对基质渗透率极低的裂缝岩石渗透率的影响。为此目的，我们应用数值估计的渗透率尺度的裂缝岩石样品含有三维离散裂缝网络（DFNs）。分析了裂缝数量、裂缝孔径和裂缝长度分布对渗透率的影响。结果表明，渗透率不仅对裂缝数量敏感，而且对DFN的几何特征也敏感。特别是，我们的研究表明，裂缝参数的增加增加了裂缝参数和渗透率之间的关系的不确定性。渗透率值与裂缝交叉点的比较表明，渗透率的增加与交叉点数量和交叉线总长度的增加相一致。
Understanding the permeability of fractured rocks can make for significant advances in the development of fluid flow and mass transport modeling. This paper investigates the effects of fracture number, length, and aperture on the permeability of fractured rocks with extremely low matrix permeability. For this purpose, we apply numerical estimations of fracture-scale permeability to fractured rock samples containing 3D discrete fracture networks (DFNs). The resulting permeability behavior is analyzed for the number, the aperture and the length distribution of the fractures. Our results indicate that permeability is sensitive not only to the fracture number but also to the geometrical characteristics of DFN. In particular, our study suggests that the increase in fractures parameters increases the uncertainty of the relation between fracture parameters and permeability. The comparison of permeability values with fractures intersections shows that increasing permeability coincides with increasing intersection points number and a total length of intersection lines.