1. Date of download: 12/26/2017
Copyright © ASME. All rights reserved.
From: Development of a New Correlation of Gas Compressibility Factor (Z-Factor) for High Pressure Gas Reservoirs
J. Energy Resour. Technol. 2013;136(1): doi: /
Figure Legend:
Z-factor as a function of reduced pressure (pr = p/pc) at Tr = 1.5 (after McCain, 27)

2. Date of download: 12/26/2017
Copyright © ASME. All rights reserved.
From: Development of a New Correlation of Gas Compressibility Factor (Z-Factor) for High Pressure Gas Reservoirs
J. Energy Resour. Technol. 2013;136(1): doi: /
Figure Legend:
Z-factor as a function of reduced pressure (pr= p/pc) at different reduced temperatures generated by the new proposed correlation, Eq. (39)

3. Date of download: 12/26/2017
Copyright © ASME. All rights reserved.
From: Development of a New Correlation of Gas Compressibility Factor (Z-Factor) for High Pressure Gas Reservoirs
J. Energy Resour. Technol. 2013;136(1): doi: /
Figure Legend:
Z-factor as a function of reduced pressure (pr = p/pc) at reduced temperature of 1.3. Comparison between the proposed, DAK, Al-Anazi correlations, and Standing-Katz charts

4. Date of download: 12/26/2017
Copyright © ASME. All rights reserved.
From: Development of a New Correlation of Gas Compressibility Factor (Z-Factor) for High Pressure Gas Reservoirs
J. Energy Resour. Technol. 2013;136(1): doi: /
Figure Legend:
Comparison between the different Z-factor correlation with actual measured data for gas mixture 1 at Tpr =  After ppr value of 10.5 Al-Anazi correlation start to give values less than zero. The proposed correlation is the best one to predict the gas compressibility factor at high pressures. The reservoir pressure for this mixture at ppr = 30 is  MPa (20,000 psi).

5. Date of download: 12/26/2017
Copyright © ASME. All rights reserved.
From: Development of a New Correlation of Gas Compressibility Factor (Z-Factor) for High Pressure Gas Reservoirs
J. Energy Resour. Technol. 2013;136(1): doi: /
Figure Legend:
Comparison between the different Z-factor correlation with actual measured data for gas mixture 1 at Tpr =  After ppr value of 9 Al-Anazi correlation start to give values less than zero. The proposed correlation is the best one to predict the gas compressibility factor at high pressures. The reservoir pressure for this mixture at ppr = 30 is  MPa (20,000 psi).

6. Date of download: 12/26/2017
Copyright © ASME. All rights reserved.
From: Development of a New Correlation of Gas Compressibility Factor (Z-Factor) for High Pressure Gas Reservoirs
J. Energy Resour. Technol. 2013;136(1): doi: /
Figure Legend:
Comparison between the different Z-factor correlation with actual measured data for gas mixture 2 at Tpr =  After ppr value of 10 Al-Anazi correlation start to give values less than zero. The proposed correlation is the best one to predict the gas compressibility factor at high pressures. The reservoir pressure for this mixture at ppr = 30 is  MPa (20,000 psi).

7. Date of download: 12/26/2017
Copyright © ASME. All rights reserved.
From: Development of a New Correlation of Gas Compressibility Factor (Z-Factor) for High Pressure Gas Reservoirs
J. Energy Resour. Technol. 2013;136(1): doi: /
Figure Legend:
Gas density for mixture 1 at  K (300 °F), the proposed correlation gives accurate prediction at high pressures

8. Date of download: 12/26/2017
Copyright © ASME. All rights reserved.
From: Development of a New Correlation of Gas Compressibility Factor (Z-Factor) for High Pressure Gas Reservoirs
J. Energy Resour. Technol. 2013;136(1): doi: /
Figure Legend:
Gas compressibility factor at  K (220 °F), Tr = 1.93, using the proposed correlation

9. Date of download: 12/26/2017
Copyright © ASME. All rights reserved.
From: Development of a New Correlation of Gas Compressibility Factor (Z-Factor) for High Pressure Gas Reservoirs
J. Energy Resour. Technol. 2013;136(1): doi: /
Figure Legend:
Gas compressibility for mixture 1 at  K (300 °F) using the proposed correlation and comparing it with charts developed by McCain (27)

10. Date of download: 12/26/2017
Copyright © ASME. All rights reserved.
From: Development of a New Correlation of Gas Compressibility Factor (Z-Factor) for High Pressure Gas Reservoirs
J. Energy Resour. Technol. 2013;136(1): doi: /
Figure Legend:
Comparison between measured gas viscosity and gas viscosity estimated based on the Z-factor from proposed, DAK, and Al-Anzi correlations for methane gas at  K (300 °F)