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Understanding fluid flow through rocks is of key interest in hydrocarbon  production and CO2 sequestration, amongst other applications. Such  fluid injection or extraction from subsurface reservoirs can be significantly  modified (increased or decreased) by deformation and in particular by localised  deformation features (fractures, shear bands and compaction bands). How such  deformation alters fluid flow is however not well characterised experimentally.  Measurement of fluid-flow distributions throughout a specimen requires  techniques that can, first, see inside a test specimen and, second, see the  fluid distinctly from the solid part. Therefore, neutron absorption imaging is  well adapted to fluid flow monitoring in rocks as water is largely opaque to  neutrons (i.e., it is highly absorbing) and rocks are generally less absorbing.  In this paper we present initial results of neutron radiography monitoring of  fluid-flow through samples of a sandstone containing localised deformation  features (shear-bands). A comparison of flow through an intact specimen and flow  through samples containing localised deformation features is presented that  provides insight into the effect of localised deformation on the flow  properties

Local characterisation of fluid flow in sandstone with localised deformation features through fast neutron imaging