Free Online PVT Calculator

Calculate the properties of petroleum reservoir fluids with a reliable, simple PVT calculator. Use the Glaso oil formation volume factor calculator.

Oil Formation Volume Factor

Glaso (1980)

First-stage separator gas specific gravity

Stock-tank oil specific gravity

Solution gas-oil ratio at bubble point pressure

N.B. At pressures less than bubble point pressure, the Glaso (1980) correlations are used to calculate the solution gas-oil ratio and the saturated oil formation volume factor. At pressures greater than bubble point pressure, the Vazquez-Beggs (1980) correlation for the under-saturated oil compressibility is used to calculate the under-saturated oil formation volume factor.

Want more details? Discover Glaso (1980) correlations.

Fluid Property Behavior

Oil Formation Volume Factor

In this section, I would like to make sure that you can easily describe the behavior of your oil formation volume factor at any reservoir pressure. Therefore, I will give you brief technical notes by answering three questions.

Why the oil formation volume factor is maximum at bubble point pressure?

When the pressure decreases above the bubble point pressure, the solution gas-oil ratio remains constant. As a result, the single-phase oil starts expanding until the pressure reaches the bubble point pressure. On the other hand, when the pressure decreases below the bubble point pressure, more gas is liberating from the liquid phase, making the oil shrink rapidly. Actually, almost all the black oil properties respond differently to the decrease in reservoir pressure.

What are the PVT properties that are affecting the value estimated for the oil formation volume factor?

The oil formation volume factor is strongly dependent on the values estimated for both the bubble point pressure and the solution gas-oil ratio.

What are the PVT properties that depend on the value estimated for the oil formation volume factor?

Both the oil density and the oil compressibility are strongly dependent on the value estimated for the oil formation volume factor.

Calculate more PVT properties

Use the most powerful fluid property calculator.

Gas Z Compressibility Factor

Gas Formation Volume Factor

Oil Bubble Point Pressure

Solution Gas-Oil Ratio

Oil Formation Volume Factor

Oil Viscosity

Oil Density

Oil Compressibility

Total Formation Volume Factor

Gas-Oil Surface Tension

Want to calculate even more?

Try PVT Solver for free and figure out how powerful and simple it is.

Free Online PVT Calculator

Oil Formation Volume Factor

Fluid Property Behavior

Oil Formation Volume Factor

Calculate more PVT properties

Gas Z Compressibility Factor

Gas Formation Volume Factor

Oil Bubble Point Pressure

Solution Gas-Oil Ratio

Oil Formation Volume Factor

Oil Viscosity

Oil Density

Oil Compressibility

Total Formation Volume Factor

Gas-Oil Surface Tension

Want to calculate even more?

Product

PVT Calculator

Fluid Correlation

Support

Follow us