Molecular Dynamics Simulation of Spontaneous Imbibition in Nanopores and Recovery of Asphaltenic Crude Oils Using Surfactants for EOR Applications

Molecular Dynamics Simulation of Spontaneous Imbibition in Nanopores and Recovery of Asphaltenic Crude Oils Using Surfactants for EOR Applications — We present Molecular Dynamics (MD) simulations of the imbibition process in nanopores in case of two different mechanisms of the wettability modification. We compare the imbibition of an aqueous surfactant solution into an oil-wet pore driven by surfactant adsorption onto the oil-wet rock surface (coating mechanism) and the imbibition of an aqueous surfactants solution driven by surfactants removing the contaminant molecules from the originally water-wet surface (cleaning mechanism). Our results show qualitative difference in the imbibition dynamics in these two cases and indicate that MD simulation is a useful tool to investigate details of the imbibition mechanisms at the pore scale with direct implications for Enhanced Oil Recovery (EOR) operations. Oil & Gas Science and Technology – Rev. IFP Energies nouvelles Copyright © 2012, IFP Energies nouvelles DOI: 10.2516/ogst/2012039 Pore2Field – Flows and Mechanics in Natural Porous Media from Pore to Field Scale Pore2Field – Physique des écoulements en milieux poreux naturels : de l'échelle du pore à l'échelle du réservoir IFP Energies nouvelles International Conference Rencontres Scientifiques d’IFP Energies nouvelles Oil & Gas Science and Technology – Rev. IFP Energies nouvelles 2