sci.permeability-darcy Calculator
Calculates intrinsic permeability k from Darcy's law steady-state flow: k = (µQL)/(AΔP), from flow rate, pressure drop, and sample dimensions. Sandstone permeability: 1 mD to 1 D; tight gas: 0.001–0.1 mD; shale: 0.0001–0.001 mD — hydraulic fracturing creates high-permeability pathways in tight formations.
Inputs
- Q M3 S
- Volume of fluid per unit time. Used to size pipes, pumps, and ducts.
- L M
- Linear measurement. Ensure consistent units: 1 m = 1,000 mm = 3.281 ft.
- A M2
- Two-dimensional surface extent (m²). For complex shapes, break into simpler sub-shapes and sum.
- Dh M
- Reference formula or conversion factor shown for context.
- Mu Mpas
- Fluid resistance to flow. Water at 20°C: ~1 cP. Honey: 2,000–10,000 cP. Higher viscosity increases pumping power requirements.
Results
- hydraulic conductivity K (m/s)
- Sample size or count used in the calculation.
- intrinsic permeability k (m²)
- Sample size or count used in the calculation.
- k in Darcy units
- Sample size or count used in the calculation.
- K = Q·L/(A·ΔH)
- Reference formula or conversion factor shown for context.
- classification
- Category assigned based on where the computed value falls on a defined scale. Check which standard or guideline defines these boundaries.
- conversion
- Sample size or count used in the calculation.
sample conductivity intrinsic hydraulic darcy