On the interpretation of hydraulic pulse tests on rock specimens

Selvadurai, A. P. S.; Najari, M.

doi:10.1016/j.advwatres.2012.11.008

Cited by 32 publications

(16 citation statements)

References 28 publications

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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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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 estimation of permeability in such low permeability rocks is, however, a non-routine exercise. Transient tests (Selvadurai and Carnaffan, 1997;Selvadurai and Jenner, 2012;Selvadurai and Najari, 2013;Najari and Selvadurai, 2014;Selvadurai et al, , 2011) are used to estimate the fluid transport properties of low permeability rocks and even in these tests, factors such as presence of air in the pressurized fluid cavity and in the accessible pore space of the rock, the degree of saturation, residual pore fluid pressures and the stress state -induced micro-cracks and damage -can influence the estimated permeability (Selvadurai, 2004(Selvadurai, , 2009aSelvadurai and Głowacki, 2008;Selvadurai and Ichikawa, 2013;Selvadurai, 2012, 2014;Najari, 2013, 2015). We assume that the heat transfer in the system is through conduction only and the fluid flow velocity both in the pore space of the intact rock and through the fractures is slow enough so that the convective heat transfer terms can be neglected.…”

Section: Constitutive Modelsmentioning

confidence: 99%

Thermo-hydro-mechanical processes in fractured rock formations during a glacial advance

2015

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Abstract. The paper examines the coupled thermo-hydromechanical (THM) processes that develop in a fractured rock region within a fluid-saturated rock mass due to loads imposed by an advancing glacier. This scenario needs to be examined in order to assess the suitability of potential sites for the location of deep geologic repositories for the storage of high-level nuclear waste. The THM processes are examined using a computational multiphysics approach that takes into account thermo-poroelasticity of the intact geological formation and the presence of a system of sessile but hydraulically interacting fractures (fracture zones). The modelling considers coupled thermo-hydro-mechanical effects in both the intact rock and the fracture zones due to contact normal stresses and fluid pressure at the base of the advancing glacier. Computational modelling provides an assessment of the role of fractures in modifying the pore pressure generation within the entire rock mass.

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“…The influences of these restrictions, in comparison with the complete Biot result for the pore pressure decay response, were compared by Hart and Wang (1998) who examined the onedimensional piezo-conduction equation. More recently Selvadurai and Najari (2013) presented a comparison of the two approaches by examining the responses of rocks such as Indiana Limestone and Westerly Granite and supplemented the study with experimental results obtained from Stanstead Granite. The parameters controlling the pressure decay can, in general, be determined relatively accurately from conventional geotechnical tests.…”

Section: Introductionmentioning

confidence: 99%

Isothermal Permeability of the Argillaceous Cobourg Limestone

Selvadurai¹,

Najari²

2016

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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-The paper presents the results of an experimental evaluation of the permeability of the heterogeneous argillaceous limestone from the Cobourg formation located in southern Ontario, Canada. The low permeability of the limestone necessitated the development of experimental techniques for effectively measuring the permeability of the rock. In particular, we examine the results of pressurization of a fluid-filled co-axial cylindrical cavity of finite length cored into a 150 mm diameter cylinder of the Cobourg Limestone. The orientation of the cavity is either normal to or along the nominal stratifications identified by the argillaceous partings separating the quartzitic phases. Both steady state and transient tests are used to estimate the permeability of the Cobourg Limestone. The paper also investigates the influence of a nominal axial load on the permeability of the rock.

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On the interpretation of hydraulic pulse tests on rock specimens

Cited by 32 publications

References 28 publications

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

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

Thermo-hydro-mechanical processes in fractured rock formations during a glacial advance

Isothermal Permeability of the Argillaceous Cobourg Limestone

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