## Free Online PVT Calculator

Calculate the properties of petroleum reservoir fluids with a reliable, simple PVT calculator. Use now the Standing solution gas-oil ratio calculator.

# Gas-Oil Ratio Calculator

Standing (1947)

First-stage separator gas specific gravity
Stock-tank oil specific gravity
Solution gas-oil ratio at bubble point pressure

N.B. The Standing (1947) correlations are used to calculate the oil bubble point pressure and the solution gas-oil ratio.

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## Fluid Property Behavior

### Solution Gas-Oil Ratio

In this section, I would like to make sure that you can easily describe the behavior of your solution gas-oil ratio at any reservoir pressure. Therefore, I will give you brief technical notes by answering three questions.
Why the solution gas-oil ratio is maximum at bubble point pressure?
At pressures above the bubble point pressure, the oil phase is saturated with the maximum amount of soluble gas. As a result, the solution gas-oil ratio remains constant. On the other hand, when the pressure decreases below the bubble point pressure, more gas is liberating from the liquid phase, leaving the oil with less gas in solution. 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 solution gas-oil ratio?
The solution gas-oil ratio is strongly dependent on the value estimated for the bubble point pressure.
What are the PVT properties that depend on the value estimated for the solution gas-oil ratio?
The oil formation volume factor, the oil viscosity, the oil density, and the oil compressibility are all strongly dependent on the value estimated for the solution gas-oil ratio.

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