Phase Behavior and ThermodynamicsPVT Properties
Average Gas Solubility Formula
Average Gas Solubility calculates average gas solubility for pvt properties workflows in phase behavior and thermodynamics.
How engineers use this formula
Use this formula when the listed inputs (s_1, s_2, p_1, p_2) 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, S_avg equals 0.1 SCF/STB/psi.
s_1SCF/STB
600
s_2SCF/STB
500
p_1psi
3000
p_2psi
2000
Inputs
s_1
SCF/STBGas Solubility at Pressure 1
s_2
SCF/STBGas Solubility at Pressure 2
p_1
psiPressure 1
p_2
psiPressure 2
Outputs
S_avg
SCF/STB/psi
Average Gas Solubility
s_1
SCF/STB
Gas Solubility at Pressure 1
s_2
SCF/STB
Gas Solubility at Pressure 2
p_1
psi
Pressure 1
p_2
psi
Pressure 2
Source and review
reviewedCraft, B.C., Hawkins, M. and Terry, R.E. 1991. Applied Petroleum Reservoir Engineering, 2nd Edition, Page 32.
Source