Convert Nanodarcy to Micrometre squared
Convert Nanodarcy (nD) to Micrometre squared (µm²) instantly and accurately.
Conversion Formula
µm² = nD × 9.869232667e-10
About Nanodarcy
The nanodarcy (nD) equals 10⁻⁹ D ≈ 9.869 × 10⁻²² m², the standard permeability unit for ultra-tight unconventional reservoirs. Barnett, Marcellus, and Eagle Ford shale matrix: 1-1 000 nD; crystalline basement rocks and caprocks: below 1 nD. Measured by pulse-decay or GRI crushed-rock methods. 1 nD = 10⁻³ µD = 10⁻⁶ mD.
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
| Nanodarcy (nD) | Micrometre squared (µm²) |
|---|---|
| 1 nD | 9.869 × 10-10 µm² |
| 2 nD | 1.974 × 10-9 µm² |
| 5 nD | 4.935 × 10-9 µm² |
| 10 nD | 9.869 × 10-9 µm² |
| 25 nD | 2.467 × 10-8 µm² |
| 50 nD | 4.935 × 10-8 µm² |
| 100 nD | 9.869 × 10-8 µm² |