Patent ID: 7779672

Claim:
A method for measuring the minimum miscibility pressure of a liquid and a gas phase, are placed in a cell under pressure, comprising: a) injecting one of the phases into the cell with an injection line, at a flow rate to form globules, comprising liquid drops or gas bubbles, of the injected one phase in the other phase, and discharging the injected phase from the cell at a second flow rate at which the cell is maintained at a constant pressure; b) determining a number of globules of the injected phase per time unit, by continuous measurement of differential pressure between an inside of the cell and the injection line; c) establishing, for the given flow rate, a function relating an inverse of the number of globules of the injected phase per time unit to pressure within the cell, by varying pressure within the cell and by repeating a) and b) for each pressure; and d) estimating the minimum miscibility pressure of the phases by pressure-within the cell for which the function is equal to zero.