NDLI: Efficiency of a two-step upscaling method for permeability evaluation at Darcy and pore scales

Content Provider	Springer Nature Link
Author	Horgue, Pierre Guibert, Romain Gross, Hervé Creux, Patrice Debenest, Gérald
Copyright Year	2015
Abstract	This work presents a new subdivision method to upscale absolute permeability fields. This process, called two-step method, consists in (i) solving micro-scale equations on subdomains obtained from the full domain regular decomposition and (ii) solve a second upscaling with Darcy’s law on the permeability fields obtained in the first step. The micro-scale equations used depend on the case studied. The two-step upscaling process is validated on randomly generated Darcy-scale permeability fields by measuring the numerical error induced by upscaling. The method is then applied to real domains obtained from sandstone micro-tomographic images. The method specificities due to pore-space structure are discussed. The main advantage of the two-step upscaling method resides in the drastic reduction of computational costs (CPU time and memory usage) while maintaining a numerical error similar to that of other upscaling procedures. This new upscaling method may improve permeability predictions by the use of finer meshes or larger sample volumes.
Starting Page	1159
Ending Page	1169
Page Count	11
File Format	PDF
ISSN	14200597
Journal	Computational Geosciences
Volume Number	19
Issue Number	6
e-ISSN	15731499
Language	English
Publisher	Springer International Publishing
Publisher Date	2015-09-29
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Upscaling Two-step method Permeability Computed micro-tomography Digital rock physics Earth Sciences Geotechnical Engineering & Applied Earth Sciences Hydrogeology Mathematical Modeling and Industrial Mathematics Soil Science & Conservation
Content Type	Text
Resource Type	Article
Subject	Computers in Earth Sciences Computational Theory and Mathematics Computer Science Applications Computational Mathematics

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