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.

Solution GOR

Solution gas-oil ratio at the bubble point in standard m³ per m³ of oil.

Gas gravity

Average specific gravity of dissolved gas (air = 1).

API gravity

Stock-tank oil gravity in degrees API.

Temperature (K)

Reservoir temperature.

Compute the saturated oil formation volume factor Bo 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]

Bo

Oil formation volume factor in reservoir m³ per stock-tank m³.

• 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.

• Solution Gas Oil Ratio Calculator

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

• Material Balance Oil Initially In Place Calculator

  Estimate the volumetric oil initially in place from drainage area, net thickness, porosity, water saturation and oil formation volume factor.

• Gas Formation Volume Factor Calculator

  Compute the gas formation volume factor Bg relating reservoir cubic metres to standard cubic metres at 101.325 kPa and 288.15 K.