Determination of carbon dioxide solubility in oil during interaction with a compound gaseous phase

A thermodynamic method for the determination of the solubility of a mixture of carbon dioxide and hydrocarbon gases in oil is elaborated on the basis of stage-oil separation. A method for the calculation of Henry’s constants for gases that are dissolved in oil and their temperature extrapolation are shown. Effective thermodynamic properties are estimated for carbon dioxide and C₁–C₈ hydrocarbon gases dissolved in oil. A thermodynamic model that satisfactorily describes the separation of gas from oil is created and may be included in a more complex calculation model of carbonate scaling during the exploitation of oil deposits.