Abstract: A method for selecting a candidate reservoir for enhanced oil recovery from a plurality of reservoirs comprising selecting a reservoir, calculating a normalized raw score based on target oil for the reservoir (STarget Oil), calculating a normalized raw score based on recovery factor for the reservoir (SRecovery Factor), and evaluating the plurality of reservoirs based on STarget Oil and SRecovery Factor.

Abstract: A method for estimating minimum miscibility enrichment (MME) for an injectant used in gas flooding of a reservoir at a given operating pressure comprising performing a plurality of slim tube simulations for the reservoir, determining minimum miscibility pressure (MMP) for a plurality of injected gases, creating a plot of recovery factor (RF) vs. 1?(MMP?P)/MMP wherein P is the operating pressure of the reservoir having at least one of the plurality of injected gases, wherein 1?(MMP?P)/MMP is a dimensionless pressure, wherein the plot has a y-intercept and slope, obtaining a recovery factor equation RF=i+s(1?(MMP?P)/MMP) wherein i is the y-intercept and s is the slope, determining a value for i, determining a value for s and calculating the recovery factor.