Reservoir EngineeringPermeability
Kozeny-Carman Permeability from Grain Diameter Formula
Kozeny-Carman Permeability from Grain Diameter calculates permeability for permeability workflows in reservoir engineering.
How engineers use this formula
Use this formula when the listed inputs (B, phi, d, tau) 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 mD.
Bdimensionless
0.5
phifraction
0.2
dcm
0.02
taudimensionless
2
Inputs
B
dimensionlessGeometric Factor
phi
fractionPorosity
d
cmParticle Diameter
tau
dimensionlessTortuosity
Outputs
k
mD
Permeability
B
dimensionless
Geometric Factor
phi
fraction
Porosity
d
cm
Particle Diameter
tau
dimensionless
Tortuosity
Source and review
reviewedReservoir Geomechanics, Zoback, M.D. (2007)
Zoback, M.D. 2007. Reservoir Geomechanics, Cambridge University Press, Page 41.
Source