Free Online PVT Calculator

Calculate the properties of petroleum reservoir fluids with a reliable, simple PVT calculator.

Gas-Oil Surface Tension

Asheim (1989)
First-stage separator gas specific gravity
Stock-tank oil specific gravity
Solution gas-oil ratio at bubble point pressure

N.B. The Asheim (1989) correlation for the gas-oil surface tension is used along with the Dranchuk-Abou-Kassem (DAK) (1975) correlation for the gas formation volume factor and the Standing (1947) correlation for the oil formation volume factor.

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Gas Z Compressibility Factor
Gas Formation Volume Factor
Gas-Oil Surface Tension

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