Phase Behavior and ThermodynamicsPVT Properties
Redlich-Kwong PVT Equation Formula
Redlich-Kwong PVT Equation calculates pressure for pvt properties workflows in phase behavior and thermodynamics.
How engineers use this formula
Use this formula when the listed inputs (R, T, V, a, b) 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, P equals 3,301.035042 psi.
Rpsi*ft3/(lbmol*R)
10.7316
TR
600
Vft3/lbmol
2
aconsistent EOS units
100
bft3/lbmol
0.05
Inputs
R
psi*ft3/(lbmol*R)Gas Constant
T
RAbsolute Temperature
V
ft3/lbmolEOS Volume Basis
a
consistent EOS unitsRedlich-Kwong Attraction Parameter
b
ft3/lbmolRedlich-Kwong Covolume Parameter
Outputs
P
psi
Pressure
R
psi*ft3/(lbmol*R)
Gas Constant
a
consistent EOS units
Redlich-Kwong Attraction Parameter
Source and review
reviewedGas Conditioning and Processing, Campbell, J. M. (1992)
John M. Campbell. 1992. Gas Conditioning and Processing, Campbell Petroleum Series, Vol. 1, Page 48.
Source