Phase Behavior and ThermodynamicsPVT Properties
Solution Gas-Water Ratio Formula
Solution Gas-Water Ratio calculates solution gas-water ratio for pvt properties workflows in phase behavior and thermodynamics.
How engineers use this formula
Use this formula when the listed inputs (T, S, R_swp) 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_sw equals 16.060916 SCF/STB.
T°F
180
S% by weight solids
5
R_swpSCF/STB
20
Inputs
T
°FTemperature
S
% by weight solidsSalinity
R_swp
SCF/STBSolution Gas-Pure Water Ratio
Outputs
R_sw
SCF/STB
Solution Gas-Water Ratio
R_swp
SCF/STB
Solution Gas-Pure Water Ratio
S
% by weight solids
Salinity
T
°F
Temperature
Source and review
reviewedCraft, B.C., Hawkins, M. and Terry, R.E. 1991. Applied Petroleum Reservoir Engineering, 2nd Edition, Page 46.
Source