Convert Millidarcy to Micrometre squared
Convert Millidarcy (mD) to Micrometre squared (µm²) instantly and accurately.
Conversion Formula
µm² = mD × 0.0009869232667
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.
About Micrometre squared
The micrometre squared (µm²) equals 10⁻¹² m², the SI-consistent permeability unit used in European reservoir standards and ISO documents. 1 µm² ≈ 1.0133 D - numerically close to but distinct from the darcy. Clean gravel: 1-10 µm²; clean sandstone: 10⁻³-0.1 µm². 1 µm² = 10⁶ nm² = 10⁻⁶ mm².
Quick Reference Table
| Millidarcy (mD) | Micrometre squared (µm²) |
|---|---|
| 1 mD | 0.000986923 µm² |
| 2 mD | 0.00197385 µm² |
| 5 mD | 0.00493462 µm² |
| 10 mD | 0.00986923 µm² |
| 25 mD | 0.0246731 µm² |
| 50 mD | 0.0493462 µm² |
| 100 mD | 0.0986923 µm² |