# Gas Formation Volume Factor(B_{g})

Formation volume factor of gas is defined as the volume of gas at reservoir pressure and temperature required to produce one standard volume of gas at the surface.

Engineers must compute the z-factor (from correlations if not available from laboratory measurements) and then use it in the calculation of gas formation volume factor.

Reference: PVT Property Correlations, Ahmed El-banbi, 2018

### Correlations

- 1-Dry
- 2-Wet

### Input Parameters

Name | Input Value - Unit | Converted Value | Validity | Link to Calculation Page | |||
---|---|---|---|---|---|---|---|

Temperature | 220 | °f | |||||

Pressure | 2100 | psi | |||||

Compressibility Factor (Z-factor) | 0.855 | - | Gas Compressibility Factor (Z-Factor) | ||||

Condensate API | 50 | deg API | |||||

Solution Gas/Oil Ratio (R_{s}) More Details | 150000 | SCF/STB | Oil Gas Solubility (R_{s}) | ||||

CALCULATE | |||||||

## Results | |||||||

Correlation | Calculated Value | Warnings | Remarks | ||||

1-Dry | 0.00781 | cu ft/scf | |||||

2-Wet | 0.00541 | cu ft/scf |