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Calculate the properties of petroleum reservoir fluids with a reliable, simple PVT calculator. Use the Dranchuk-Abou-Kassem gas z compressibility factor calculator.

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Calculate the properties of petroleum reservoir fluids with a reliable, simple PVT calculator. Use the Dranchuk-Abou-Kassem gas z compressibility factor calculator.

Dranchuk-Abou-Kassem (1975)

**N.B.** The Dranchuk-Abou-Kassem (DAK) (1975) correlation for the gas z compressibility (deviation) factor is used along with the Sutton (2007) correlation for the gas pseudo-critical properties and the Wichert-Aziz (1972) correlation for the non-hydrocarbons correction.

Want more details? Discover Dranchuk-Abou-Kassem (1975) correlation.

10% error in the reservoir PVT properties leads to a 10% error in your estimated reserves. And that's why you need a reliable fluid property calculator.

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In this section, I would like to make sure that you can easily describe the behavior of your gas z compressibility (deviation) factor at any pressure. Therefore, I will give you brief technical notes by answering three questions.

Why the gas z-factor increases as pressure increases?

At standard conditions, the gas behaves as an ideal gas. And that’s why the gas compressibility z factor equals one. As pressure increases, the gas tends to deviate from the ideal behavior. As a result, the gas z-factor increases as pressure increases. Actually, almost all the black oil properties respond differently to the decrease in reservoir pressure.

What are the PVT properties that affect the gas z factor estimated value?

The gas z-factor is strongly dependent on the values estimated for both gas pseudo-critical temperature and gas pseudo-critical pressure.

What are the PVT properties that depend on the gas z-factor estimated value?

The gas formation volume factor, the gas viscosity, the gas density, and the gas isothermal compressibility are all strongly dependent on the value estimated for the gas z-factor.

"Excellent software to predict fluid properties that are vital for any reservoir simulation study."

University of Engineering and Technology,

Lahore, Pakistan

"A user-friendly tool for black-oil calculations. I recommend using PVT Solver software."

Petroxin Limited,

London, UK

"An easy and intuitive application that applies the most popular fluid correlations in the industry."

PDVSA Oil and Natural Gas Company,

Zulia, Venezuela

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