Phase Behavior and ThermodynamicsPVT Properties
Peng-Robinson PVT Equation Formula
Peng-Robinson 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 3,159.088542 consistent EOS pressure basis.
Rconsistent EOS units
10.7316
Tabsolute temperature
600
Vconsistent EOS volume basis
2
aconsistent EOS units
1
bconsistent EOS volume basis
0.05
Inputs
R
consistent EOS unitsGas Constant
T
absolute temperatureAbsolute Temperature
V
consistent EOS volume basisEOS Volume Basis
a
consistent EOS unitsPeng-Robinson Attraction Parameter
b
consistent EOS volume basisPeng-Robinson Covolume Parameter
Outputs
P
consistent EOS pressure basis
Pressure
R
consistent EOS units
Gas Constant
a
consistent EOS units
Peng-Robinson 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 conflict
Source