On Cavity Flow Permeability Testing of a Sandstone

Selvadurai, P.

doi:10.1111/j.1745-6584.2006.00253.x

Cited by 10 publications

(5 citation statements)

References 13 publications

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“…McLatchie et al 136 discussed the influence of skeletal compressibility on the permeability of reservoir rock and the correlation between permeability reduction both with confining stresses and with an increase in the clay content. Similar studies on sandstone and argillaceous limestone are documented [137][138][139][140][141][142][143] . The radial percolation tests discussed by Londe and Sabarly 144 and Jaeger 127 involve initiating converging flow from the exterior of the cylinder to a partially drilled cavity.…”

Section: = Vxsupporting

confidence: 57%

“…The application of external isotropic compressive stresses to fluid saturated rocks and their influence on reducing permeability has also been investigated by appeal to steady state fluid flow tests 137,[161][162][163][164][165][166][167][168][169][170][171][172][173][174] . The influence of nonisotropic stress states in enhancing permeability derived from steady state tests has also been discussed [137][138][139][140][141][162][163][164][165][166][167][168][169][170][171][172][173][174][175][176] .…”

Section: = Vxmentioning

confidence: 99%

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Cavity Flow Permeability Testing of an Intact Granite

Selvadurai

2023

Preprint

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Permeability of intact geologic media features prominently in many geo-environmental endeavours. The laboratory estimation of permeability is an important adjunct to the field estimation of bulk permeability values, which involves a great deal of supplementary in situ investigations to correctly interpret field data. Laboratory permeability estimation is also a viable method if core samples are recovered from in situ geological mapping of the region under study. The basic methodologies for permeability estimation rely on either steady state or transient tests of the geologic material depending on the anticipated permeability value. This paper presents a brief review of these two basic approaches and uses a steady flow test conducted on a partially drilled cavity located on the axis of a cylindrical specimen. Certain compact theoretical relationships are proposed for the estimation of steady flow from a cavity of finite dimensions located along the axis of a cylindrical specimen. The relationships are used to estimate the permeability of a cylinder of Lac du Bonnet granite obtained from the western flank of the Canadian Shield. The results from the cavity flow permeability experiments are compared with other estimates for the permeability of granitic rocks reported in the literature.

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Section: = Vxsupporting

confidence: 57%

Section: = Vxmentioning

confidence: 99%

Cavity Flow Permeability Testing of an Intact Granite

Selvadurai

2023

Preprint

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“…In this study, the fluid transport characteristics of the porous medium were considered to be transversely isotropic and the coordinate directions were assumed to coincide with the principal directions of elasticity. Hydraulic transverse isotropy in porous media has been extensively documented in the literature in geomechanics and groundwater engineering, and references can be found in Hvorslev (1951), Bear (1972), Selvadurai (2003a, 2003b, 2004, 2007, 2009, 2011), Selvadurai and Selvadurai (2007, 2010), Selvadurai et al (2011), Massart and Selvadurai (2012), Selvadurai and Jenner (2013), and Selvadurai and Najari (2013).…”

Section: Governing Equation Of Coupled Infiltration Problemsmentioning

confidence: 99%

Two‐Dimensional Coupled Hydromechanical Modeling of Water Infiltration into a Transversely Isotropic Unsaturated Soil Region

Selvadurai

Huang

2013

Vadose Zone Journal

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The partial differential governing equation governing fluid infiltration into an unsaturated transversely isotropic porous medium was developed by considering mass conservation, Darcy's law, and the elastic deformability of the porous skeleton. Analytical solutions for two‐dimensional coupled infiltration in an unsaturated porous medium of finite extent were obtained using a Fourier transform technique. The analytical formulation was used to examine the two‐dimensional infiltration and evaporation problem for a transversely isotropic unsaturated porous medium. This study provides a comparison between the analytical solution and computational estimates for a two‐dimensional coupled infiltration problem in a transversely isotropic deformable porous region where there is recharge at the surface. The results indicate that the pressure head changes occur most rapidly when the unsaturated porous medium is hydraulically isotropic.

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“…The ‘ bulk hydraulic conductivity ’ of geological media will be influenced by the choice of scale, and factors contributing to such variations can occur due to the abundance of fractures, fissures, inclusions and other inhomogeneities. Laboratory evaluations of hydraulic conductivity even at the size of large samples 26, 27 provide estimates only of the intact hydraulic conductivity and recourse must therefore be made to in situ investigations to determine the hydraulic conductivity characteristics at appreciable scales of interest.…”

Section: Introductionmentioning

confidence: 99%