| Abstrakt: |
Among the essential thermodynamic parameters of behavior, analysis (PVT) in natural gas engineering is the gas compressibility factor (Z). In this work, we improve the results of the compressibility factor (Z) prediction accurately after modifying the cubic equation coefficients for different gas types; the cubic equation of state (EOS) prediction model was tested using 149 experimental data under different conditions. In this study, the gas compressibility factor is calculated by Peng Robinson's equation of state (PR EOS). Additionally, the coefficients were updated to reflect a better representation of natural gas. The results are compared to the predictions of the original PR EOS and other equations of state in the literature. The statistical analysis shows an average absolute deviation percentage (AAD %) of 0,99% and a coefficient of determination (R²) of 0,9968 at pressure and temperature up to 16632,93 PSI (114,68 MPa) and 426,74K, respectively. The proposed model can effectively calculate (Z) for any type of gas, including condensate gas. [ABSTRACT FROM AUTHOR] |
