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Abstract:
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Injection of gases into a reservoir for enhanced oil recovery results in complex fluid phase behavior that cannot be modeled by black oil simulators . This interaction of flow and phase behavior is best captured by fully compositional simulators . A drawback of fully compositional simulators is that they require accurate reservoir fluid characterizations by equations of state (EOS ) to capture the phase interactions in miscible gas floods . Another disadvantage is that EOS are computationally intensive . An EOS is typically tuned to standard PVT data , which may include multicontact experiments and swelling tests . The standard method of tuning , however , does not incorporate important displacement parameters such as the minimum miscibility pressure or enrichment (MMP or MME ) or the likely compositions that result in a reservoir from condensing -vaporizing displacements . |