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The effect of nanoparticles on spontaneous imbibition of brine into initially oil-wet sandstones
, Article Energy Sources, Part A: Recovery, Utilization and Environmental Effects ; Volume 41, Issue 22 , 2019 , Pages 2746-2756 ; 15567036 (ISSN) ; Ghasemi Dehkordi, M ; Sharif University of Technology
Taylor and Francis Inc
2019
Abstract
In this paper, the effect of silica nanoparticles on oil production due to the spontaneous imbibition of brine into oil-wet sandstones has been studied. The imbibed fluids were NaCl 3 wt. % solutions containing various concentrations of nanoparticles and the recovered oil for each solution was compared. The results revealed that nanoparticles yielded more oil recovery. Nanofluid was used after brine imbibition, and the oil recovery increased from 17.8% to 40% while in the case of using the same nanofluid as the first imbibed fluid the oil recovery was 53%. Also, the results indicated that the oil recovery depends on nanoparticle concentrations. © 2019, © 2019 Taylor & Francis Group, LLC