Convert Metre squared to Millidarcy
Convert Metre squared (m²) to Millidarcy (mD) instantly and accurately.
Conversion Formula
mD = m² × 1.013250000e+15
About Metre squared
The square metre (m²) is the SI coherent unit of permeability (dimension [L²]) and the reference for all other permeability units. Most geological materials have k far below 1 m²; clean coarse gravel: ≈10⁻⁸ m²; shale: 10⁻²²-10⁻¹⁵ m². 1 m² = 10¹² µm² ≈ 1.013 × 10¹² D.
About Millidarcy
The millidarcy (mD) equals 10⁻³ D ≈ 9.869 × 10⁻¹⁶ m², the everyday unit in petroleum reservoir engineering worldwide. Conventional sandstone reservoirs: 1-1 000 mD; carbonate reservoirs: 0.1-100 mD; economic gas recovery typically requires k ≥ 0.1 mD. Permeameter and well-test reports give results in mD. 1 mD = 10⁻³ D = 10³ µD.
Quick Reference Table
| Metre squared (m²) | Millidarcy (mD) |
|---|---|
| 1 m² | 1.013 × 1015 mD |
| 2 m² | 2.026 × 1015 mD |
| 5 m² | 5.066 × 1015 mD |
| 10 m² | 1.013 × 1016 mD |
| 25 m² | 2.533 × 1016 mD |
| 50 m² | 5.066 × 1016 mD |
| 100 m² | 1.013 × 1017 mD |