Minimum Miscibility Pressure (MMP)

Definition - What does Minimum Miscibility Pressure (MMP) mean?

Minimum Miscibility Pressure is the lowest pressure at constant composition and temperature, at which multiple or first-contact miscibility can be attained. Interfacial tension is present at such pressure and also, there exists no interface between the fluids. It is basically the minimum pressure by which crude oil remains miscible with CO2 at reservoir temperature. In gas injection project design, the key parameter is Minimum Miscibility Pressure, which is the pressure by which local displacement efficiency reaches 100%. The local displacement efficiency is dependent on the Minimum Miscibility Pressure.

Petropedia explains Minimum Miscibility Pressure (MMP)

Minimum Miscibility Pressure is generally used as the key criteria for evaluating and selecting the most suitable solvents for improved oil recovery projects. This is the lowest pressure by which gas can attain miscibility via a multi-contact process at reservoir temperature in the given oil reservoir. The formation of oil to which this process is applied should be operated above or at the Minimum Miscibility Pressure. The parameter, before field trial, is required to be detected at laboratory which is done traditionally with the help of various experiments such as raising bubble or slim tube experiment.

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