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    Brine permeability predictions for sand packs and sandstones using Navier-Stokes equations and three-dimensional micro-tomography images of pore spaces

    Access Status
    Fulltext not available
    Authors
    Ahmed, S.
    Iglauer, Stefan
    Date
    2012
    Type
    Conference Paper
    
    Metadata
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    Citation
    Ahmed, Shakil and Iglauer, Stefan. 2012. Brine permeability predictions for sand packs and sandstones using Navier-Stokes equations and three-dimensional micro-tomography images of pore spaces, in C.B. Solnordal and others (ed), 9th International Conference on Computational Fluid Dynamics in the Minerals and Process Industries, Dec 10-12 2012. Melbourne: CSIRO.
    Source Title
    Yes
    Source Conference
    9th International Conference on CFD in the Minerals and Process Industry
    Additional URLs
    http://www.cfd.com.au/cfd_conf12/PDFs/193AHM.pdf
    URI
    http://hdl.handle.net/20.500.11937/2846
    Collection
    • Curtin Research Publications
    Abstract

    A sand pack and a sandstone were imaged with micro-computed tomography at nominal voxel sizes of approximately (6μm)3. From these images the pore morphologies of the porous media were obtained by segmentation. The segmented images were then used to generate surface and volume meshes of pore spaces for flow analysis. Three-dimensional, steady state, isothermal, incompressible single phase fluid flow fields were obtained by solving the continuity and Navier-Stokes equations. An inlet boundary condition was set by specifying the brine injection velocity while a pressure boundary condition was prescribed at the outlet, which resulted in laminar flow, and which is representative of flow in aquifers or oil reservoirs. From the pressure and velocity vector fields we computed the total pressure drop across the sample and the area-averaged velocity at the inlet with which we then determined brine permeability for each porous medium. The predicted permeabilities were consistent with experimental core-flood data; the presented approach is therefore a rapid and cost-effective method to determine single-phase permeabilities of incompressible fluids in porous media. Only small dry rock fragments are required for the described analysis.

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