关键词: 重质烃, 二氧化碳, 黏度, 计算公式, 经验参数, 超临界, 拟合公式,

Abstract:

By comparison, it is found that the calculated viscosity values of heavy hydrocarbon and carbon dioxide mixtures differ significantly from the literature values. Based on the literature values, an empirical formula for calculating parameter α in the formula was refitted within the range of mixing temperature 60～120 ℃ and pressure 5～20 MPa. The newly fitted empirical formula considers the effects of temperature, pressure, resin content, and asphaltene content on the viscosity of the mixture, making the calculated viscosity of the mixture closer to the literature values. The calculation results indicate that at the same temperature, an increase in pressure leads to an increase in dissolved carbon dioxide and a decrease in the viscosity of the mixture; under the same pressure, an increase in temperature causes a decrease in the viscosity of heavy hydrocarbons and a decrease in the viscosity of the mixture; the higher the content of resin and asphalt, the greater the viscosity of the mixture. Based on the calculation results, it is recommended to mix heavy hydrocarbons and carbon dioxide at a pressure of 9～10 MPa and a mixing temperature of 90～120 ℃. The current experimental data is limited, and more data can be included for further fitting or correction to improve the range and accuracy of the new formula.

Key words: heavy hydrocarbon, carbon dioxide, viscosity, calculation formula, empirical parameter, supercritical, fitting formula,