Reservoir EngineeringRock Properties
Leverett J-Function from Capillary Pressure Formula
Leverett J-Function from Capillary Pressure calculates leverett j-function for rock properties workflows in reservoir engineering.
How engineers use this formula
Use this formula when the listed inputs (P_c, sigma, theta, k, phi) are known and the assumptions behind the cited rock 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, J equals 3.72678 dimensionless.
P_cdyn/cm^2
5
sigmadyn/cm
30
thetarad
0
kmD
100
phifraction
0.2
Inputs
P_c
dyn/cm^2Capillary Pressure
sigma
dyn/cmFluid Interfacial Tension
theta
radWettability Angle
k
mDPermeability
phi
fractionPorosity
Outputs
J
dimensionless
Leverett J-Function
P_c
dyn/cm^2
Capillary Pressure
sigma
dyn/cm
Fluid Interfacial Tension
theta
rad
Wettability Angle
k
mD
Permeability
phi
fraction
Porosity
Source and review
reviewedReservoir Engineering Handbook, Ahmed, T. (2006)
Ahmed, T. 2006. Reservoir Engineering Handbook, Fourth Edition, Page 224.
Source