| The objective of this study was to measure gas-oil and water-oil relative permeability in a slimtube apparatus at reservoir condition. Slimtube has been used in laboratories to determine the minimum miscibility pressure of oil in gas injection process. The applications of slimtube experiments are to measure the oil recovery as a function of pressure or enriched composition to determine the minimum miscibility pressure or minimum enrichment composition. The experimental results can be applied to adjust equation of state parameters for compositional simulation in study of gas injection process. The gas injection process includes carbon dioxide, lean gas or enriched gas injection in which miscible and immiscible displacement take place. When it is not a miscible displacement, two phase flow of gas and oil is controlled by gas and oil relative permeability, which is essential to the displacement process. Although a variety of correlations to predict relative permeability are available, considerable variance is present in the predicted results, and very little experimental measurements of relative permeability in slimtube has been reported.; A steady state method was used to measure the relative permeability of nitrogen-dodecane, carbon dioxide-dodecane, and water-oil at various system pressures and a constant temperature of 105°F. It was found that the characteristics of carbon dioxide-dodecane relative permeability is different from nitrogen-dodecane, which is likely attributed to the differences between the solubility of carbon dioxide and nitrogen in dodecane. The relative permeability of nitrogen-dodecane was also found in a reasonably good agreement with limited published data. |
