The spatial variability in permeability plays an important role in the coupled hydro-mechanical processes of the fractured rock mass and induces a discontinuous distribution of principal stresses.
渗透系数的空间变异性使得隧道开挖后围岩应力有明显的非连续性，对裂隙介质的耦合过程起着重要作用。
The controlled reserves and productivity of a horizontal well were determined by the wellbore direction, the principal values of main direction and permeability of the anisotropic reservoir.
结果表明，水平井的控制储量和产能由水平井方位、各向异性渗透率主值及主方向共同决定。
To certain extent, therefore, the thickness of the oil-bearing interval as well as the volume and permeability of the fracture porosity are also influenced by principal curvatures.
因而油层厚度及与之有关的裂缝孔隙体积和渗透率也在一定程度上受到构造面主曲率的影响。
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