Geomechanics and FracturingNaturally Fractured Reservoirs
Parallel Fracture Set Permeability from Cubic Law Formula
Parallel Fracture Set Permeability from Cubic Law calculates equivalent fracture set permeability for naturally fractured reservoirs workflows in geomechanics and fracturing.
How engineers use this formula
Use this formula when the listed inputs (b_h_mm, s_f_m) are known and the assumptions behind the cited naturally fractured reservoirs 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_set_mD equals 84.437497 mD.
b_h_mmmm
0.1
s_f_mm
1
Inputs
b_h_mm
mmHydraulic Fracture Aperture
s_f_m
mParallel Fracture Spacing
Outputs
k_set_mD
mD
Equivalent Fracture Set Permeability
b_h_mm
mm
Hydraulic Fracture Aperture
s_f_m
m
Parallel Fracture Spacing
Source and review
reviewedCubicLawPermeability, OpenGeoSys
Derived from OpenGeoSys cubic-law permeability, k_f=b_h^2/12, distributed over fracture spacing s_f.
SourceRelated formulas and calculators
Spherical Matrix Block Interporosity Flow Coefficient
Naturally Fractured Reservoirs