Phase Behavior and ThermodynamicsPVT Properties
Solution Gas-Oil Ratio - Standing Correlation Formula
Solution Gas-Oil Ratio - Standing Correlation calculates solution gas-oil ratio for pvt properties workflows in phase behavior and thermodynamics.
How engineers use this formula
Use this formula when the listed inputs (gamma_g, p, API, t) are known and the assumptions behind the cited pvt properties relationship match the engineering case being checked.
Assumptions
- Input values are representative for the well, reservoir, fluid, or equipment case being evaluated.
- The declared units match the field-unit constants used in the formula.
- The cited formula applies to the selected petroleum engineering workflow.
Limitations
- The calculation does not replace a full engineering model or operating procedure.
- Accuracy depends on the source correlation, assumptions, input quality, and unit consistency.
Common mistakes
- Mixing unit systems without converting the inputs.
- Using default example values as field recommendations.
- Applying the formula outside the source assumptions.
Default example
Using the default inputs, R_s equals 548.314278 SCF/STB.
gamma_gfraction
0.8
ppsi
2500
APIAPI
30
t°F
180
Inputs
gamma_g
fractionGas Specific Gravity
p
psiPressure
API
APIOil API Gravity
t
°FTemperature
Outputs
R_s
SCF/STB
Solution Gas-Oil Ratio
gamma_g
fraction
Gas Specific Gravity
p
psi
Pressure
API
API
Oil API Gravity
t
°F
Temperature
Source and review
reviewedGuo, B., Lyons, W.C. and Ghalambor, A. 2007. Petroleum Production Engineering: A Computer-Assisted Approach, Page 2/20.
Source