Determination of the best gas/oil ratio in miscible gas injection process

In this study, an algorithm to find the best gas/oil ratios in miscible gas injection process was presented. Using the presented algorithm the best gas/oil ratios for two different systems were determined. At first the minimum miscibility pressure (MMP) was calculated by the Wang theory. Then interfacial tensions were determined by gradient theory at various pressures and gas/oil ratios. The gas/oil ratio at interfacial tension which is near to zero at the determined MMP is the best gas/oil ratio in miscible gas injection process. System A is a mixture of four components. For system A the best gas/oil ratio is 6.14. For system B including 9 components and one pseudo-component, the best gas/oil ratio is 2.22.

کلیدواژه ها:

Gas injection ، Interfacial tension ، Gradient theory ، Minimum miscibility pressure