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.

Gas gravity

Specific gravity of the produced gas (air = 1).

Pressure (Pa)

Saturation (bubble point) pressure at which gas is dissolved.

API gravity

Stock-tank oil gravity in degrees API.

Temperature (K)

Reservoir temperature.

Compute the saturated solution gas-oil ratio Rs with the Standing (1947) correlation. 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]

Rs

Solution gas-oil ratio in standard m³ per m³ of oil.

• 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.

• Oil Formation Volume Factor Calculator

  Compute the saturated oil formation volume factor Bo with the Standing (1947) correlation.

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  Estimate the multiphase liquid flow rate through a production choke with the Gilbert (1954) correlation given upstream wellhead pressure, gas-liquid ratio and choke bore.