01931nab a2200193 4500 20260520002026.0 260224s2011 xxu Comparative evaluations of a new gas/oil miscibility-determination technique sep./oct. 2011 20/10/2011 ; 20/10/2011 11 p. ; 71-81 Transcripción del resumen del autor. A new experimental technique of vanishing interfacial tension (VIT) has been reported in recent literature for quick and cost-effective determination of gas/oil miscibility. However, this technique has been criticized because of the perceived absence of compositional-path specification and lack of confirmation against standard gas/oil systems. In this paper, we address these concerns by conducting interfacial-tension (IFT) measurements at elevated pressures and temperatures in two standard gas/oil systems and at varying molar compositions of gas and oil in feed mixtures. Though gas/oil ratio was found to have an impact on mass-transfer rates, the IFT between gas and oil was unaffected in the two standard gas/oil systems as the fluid phases approached equilibrium. This indicates compositional-path independence of gas/oil IFTs measured at near-equilibrium conditions; hence, miscibilities determined using the VIT technique. The minimum miscibility pressures (MMPs) determined using the VIT technique acceptably matched (within 5 to 8%) with the reported slim tube miscibilities for both the standard gas/oil systems. These experimental results clearly support wide use of the VIT technique for rapid and cost-effective determination of MMPs and minimum miscibility enrichments (MMEs) in improved-oil-recovery applications. 9/10 Journal of Canadian Petroleum Technology 50 ARTICULO Ayirala, S.C. 51968 Rao, D.N. 16756 186210 186210 0 0 0 0 254029 BAAB BAAB 2026-03-06 200058303 0 200058303 2026-03-06 00:11:38 2026-03-06 ARTICULO