MEASUREMENT PROCESS OF MINIMUM MISCIBILITY PRESSURE (MMP) AND CRITICAL POINTS OF A GAS IN CRUDE OILS OR BINARY MIXTURES

摘要

Purpose of the following invention is to provide a new application of the transitometric scan technique to determine in an experimental way the minimum miscibility pressure of any sample of hydrocarbon at constant temperature (from the atmospheric temperature until 673 K) in the pressure interval of the atmospheric temperature until 400 MPa, including pressure at which the organic matter will precipitate due to the CO2 injection, based on a transitometric technique which has proved to be reliable, highly accurate and highly reproducible. Apparatus used in the invention described herein is based on a highly accurate control of the pVT variables o non the calorimetric determination of the present phase transitions during the injection process of gases into hydrocarbons. Accurate control of pVT variables enables the determination of the derivative thermodynamic variables, this is useful to define the type of phase transition.