Reservoir EngineeringPermeability
Kozeny Permeability from Porosity and Specific Surface Area Formula
Kozeny Permeability from Porosity and Specific Surface Area calculates permeability for permeability workflows in reservoir engineering.
How engineers use this formula
Use this formula when the listed inputs (phi, k_z, S_p) are known and the assumptions behind the cited permeability 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 0.000001 cm^2.
phifraction
0.2
k_zdimensionless
5
S_p1/cm
200
Inputs
phi
fractionPorosity
k_z
dimensionlessKozeny Constant
S_p
1/cmSpecific Surface Area
Outputs
k
cm^2
Permeability
phi
fraction
Porosity
k_z
dimensionless
Kozeny Constant
S_p
1/cm
Specific Surface Area
Source and review
reviewedPetroleum Reservoir Rock and Fluid Properties, Dandekar, A.Y. (2006)
Dandekar, A.Y. 2006. Petroleum Reservoir Rock and Fluid Properties. CRC Press Taylor and Francis Group, Page 52.
Source