Phase Behavior and ThermodynamicsPVT Properties
Equilibrium Vaporization Ratio of Heptane Formula
Equilibrium Vaporization Ratio of Heptane calculates equilibrium vaporization ratio for pvt properties workflows in phase behavior and thermodynamics.
How engineers use this formula
Use this formula when the listed inputs (K_a, K_b, 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, K equals 3.354102 dimensionless.
K_adimensionless
1.5
K_bdimensionless
0.3
bdimensionless
0.5
Inputs
K_a
dimensionlessHeptane Equilibrium Ratio
K_b
dimensionlessEthane Equilibrium Ratio
b
dimensionlessEquilibrium-Ratio Exponent
Outputs
K
dimensionless
Equilibrium Vaporization Ratio
K_a
dimensionless
Heptane Equilibrium Ratio
K_b
dimensionless
Ethane Equilibrium Ratio
b
dimensionless
Equilibrium-Ratio Exponent
Source and review
reviewedGas Conditioning and Processing, Campbell, J. M. (1992)
John M. Campbell. 1992. Gas Conditioning and Processing, Campbell Petroleum Series, Vol. 3, Page 3-1.
Source