Bubble Point Pressure (Pb)
The bubble point pressure (Pb) of a hydrocarbon system is defined as the highest pressure at which a first bubble of gas is liberated from the oil.
The bubble point pressure is mainly a strong function of gas solubility (Rs), gas gravity (γg), oil gravity (API), and temperature (T).
Reference: Reservoir Engineering Handbook, Tarek Ahmed
Correlations
- 1-Standing
- 2-Glaso
- 3-Marhoun
- 4-Petrosky and Farshad
- 5-Velarde et al
- 6-Valko
- 7-Vasquez and Beggs
- 8-Hanafy et al
Input Parameters
| Name | Input Value - Unit | Converted Value | Validity | Link to Calculation Page | |||
|---|---|---|---|---|---|---|---|
| Solution Gas/Oil Ratio (Rs) Solution GOR at bubble point pressure (scf/STB) More Details | 943 | SCF/STB | Oil Gas Solubility (Rs) | ||||
| Solution Gas Specifc Gravity (ɣg) Weighted average of the separated gas specific gravities from each separator More Details | 0.781 | SG | Solution Gas Specific Gravity (ɣg) | ||||
| Temperature | 677.67 | °R | |||||
| Stock Tank Oil Specific Gravity (ɣo) More Details | 44.2 | deg API | Saturated Oil Density (ρo,s) | ||||
| Separator Pressure Actual separator pressure (first stage separator pressure at two stage separation) More Details | 200 | psi | |||||
| Separator Temperature Actual separator temperature (first stage separator temperature at two stage separation) More Details | 519.67 | °R | |||||
| First Stage Flash GOR GOR of 1st separator in two stage separation | 500 | SCF/STB | |||||
| CALCULATE | |||||||
Results | |||||||
| Correlation | Calculated Value | Warnings | Remarks | ||||
| 1-Standing | 2884.54 | psi | California crude oils and natural gases- Pb range is 130 to 7000 Psia | ||||
| 2-Glaso | 3027.32 | psi | North Sea crude oil- Pb range is 1800 to 7130 Psia | ||||
| 3-Marhoun | 3307.08 | psi | Middle Eastern crude oil systems- Pb range is 130 to 3573 Psia | ||||
| 4-Petrosky and Farshad | 3287.05 | psi | Gulf of Mexico crude oil system- Pb range is 1500 to 6500 Psia | ||||
| 5-Velarde et al | 2927.04 | psi | Pb range is 70 to 6700 Psia | ||||
| 6-Valko | 2912.79 | psi | Worldwide- Pb range is 82 to 6700 Psia | ||||
| 7-Vasquez and Beggs | 3059.84 | psi | Pb range is 15 to 6055 Psia | ||||
| 8-Hanafy et al | 2367.1 | psi | Egyptian crude oils- Pb range is 36 to 5000 Psia | ||||