Authors: Shuo Zhang HuiHai Liu Marinus I J van Dijke Sebastian Geiger Susan M Agar
Publish Date: 2016/07/14
Volume: 114, Issue: 3, Pages: 795-814
Abstract
The relationship between flow properties and chemical reactions is the key to modeling subsurface reactive transport This study develops closedform equations to describe the effects of mineral precipitation and dissolution on multiphase flow properties capillary pressure and relative permeabilities of porous media The model accounts for the fact that precipitation/dissolution only takes place in the waterfilled part of pore space The capillary tube concept was used to connect porescale changes to macroscopic hydraulic properties Precipitation/dissolution induces changes in the pore radii of waterfilled pores and consequently in the pore size distribution The updated pore size distribution is converted back to a new capillary pressure–water saturation relation from which the new relative permeabilities are calculated Pore network modeling is conducted on a Berea sandstone to validate the new continuumscale relations The pore network modeling results are satisfactorily predicted by the new closedform equations
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