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CO2 activating hydrocarbon transport across nanopore throat: insights from molecular dynamics simulation

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Abstract

In tight oil reservoirs, nanopore throat acting as the narrowest section of fluidic channel determines the oil transport performance; injecting CO2 is found to significantly promote the oil flow. Despite substantial efforts, the underlying transport mechanism of above phenomenon remains unclear. Employing molecular dynamics simulation, the oil transport through a nanopore throat is studied. A high energy barrier derived of conformation deformation, oil/pore interaction and Jamin effect is found to impede the oil transport. The CO2 activating effect for oil transport is present, and a dependence on CO2 amount is observed. The underlying mechanism was well documented from the aspects of oil swelling, interfacial tension and surface sliding. Our study provides fundamental insight into the oil transport across nanopore throat and CO2 activating effect; the results have promising applications in enhanced oil recovery in CO2 flooding.

Graphical abstract: CO2 activating hydrocarbon transport across nanopore throat: insights from molecular dynamics simulation

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Publication details

The article was received on 23 Aug 2017, accepted on 24 Oct 2017 and first published on 25 Oct 2017


Article type: Paper
DOI: 10.1039/C7CP05759H
Citation: Phys. Chem. Chem. Phys., 2017, Advance Article
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    CO2 activating hydrocarbon transport across nanopore throat: insights from molecular dynamics simulation

    Y. Yan, Z. Dong, Y. Zhang, P. Wang, T. Fang and J. Zhang, Phys. Chem. Chem. Phys., 2017, Advance Article , DOI: 10.1039/C7CP05759H

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