Use this geological calculation for a transparent first-pass interpretation of measured rock, soil, fluid, well, stratigraphic, isotopic, geophysical, or seismic data under an explicitly selected model.

Pressure (Pa)

Gas pressure.

Temperature (K)

Gas temperature.

Gas gravity

Specific gravity of the gas (air = 1).

Z factor

Gas compressibility factor at the given conditions.

Compute hydrocarbon gas viscosity with the Carr-Kobayashi-Burrows corresponding-states correlation for sweet gases. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Gas viscosity (Pa·s)

Gas viscosity in pascal seconds.

• Petroleum correlations are fluid-, pressure-, temperature-, and region-dependent. PVT sampling, phase behavior, relative permeability, capillary pressure, heterogeneity, aquifer support, well constraints, history match, and units affect forecasts and reserves.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Compare independent measurements and models, retain units and analytical metadata, propagate uncertainty, and validate interpretations against logs, cores, maps, laboratory data, or field observations.

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