Upscaling Permeability Measurements Within Complex Heterolithic Tidal Sandstones |
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| Authors: | Matthew D Jackson Ann H Muggeridge Shuji Yoshida and Howard D Johnson |
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| Institution: | (1) Centre for Petroleum Studies, Department of Earth Science and Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, United Kingdom;(2) Institute for Energy Research, Department of Geology and Geophysics, University of Wyoming, Wyoming;(3) Centre for Petroleum Studies, Department of Earth Science and Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, United Kingdom |
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| Abstract: | We investigate numerically the effect of sample volume on the effective single-phase permeability of heterolithic tidal sandstones, using three-dimensional models reconstructed directly from large rock specimens measuring  45 × 30 × 15 cm. We find that both individual and averaged effective permeability values vary as a function of sample volume, which indicates that permeability data obtained from core-plugs will not be representative at the scale of a reservoir model grid-block regardless of the number of measurements taken. However, the error introduced by averaged data may be minimized using the appropriate averaging scheme for a given facies type and flow direction. |
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| Keywords: | effective permeability representative element volume averaging tidal sandstones |
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