Negative Flash Calculation Algorithms for MinimumMiscibility Pressure

We introduce a generalization of the negative-flash calculation for computing the equilibrium for components in reservoir condition.Wefirst describe simple usual algorithm for calculation of Minimum Miscibility Pressure based on tie line approach. for this approach anexample will be presented and initial and injection tie line will be plotted. Then we introduce different methods for negative flashcalculation. By investigation of nonlinearity of our function we compare Rachford-Rice problem using Newton-Raphson method withbisection method. Improved negative flash calculation is presented and the effect of constant initial guess and updated initial guess usingprevious iteration will be compared .

Keywords:

Phase behavior , Negative flash , Tie line , Enhanced OilRecovery , Minimum Miscibility Pressure