Convert Micrometre squared to Nanodarcy
Convert Micrometre squared (µm²) to Nanodarcy (nD) instantly and accurately.
Conversion Formula
nD = µm² × 1013250000
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.
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.
Quick Reference Table
| Micrometre squared (µm²) | Nanodarcy (nD) |
|---|---|
| 1 µm² | 1.013 × 109 nD |
| 2 µm² | 2.026 × 109 nD |
| 5 µm² | 5.066 × 109 nD |
| 10 µm² | 1.013 × 1010 nD |
| 25 µm² | 2.533 × 1010 nD |
| 50 µm² | 5.066 × 1010 nD |
| 100 µm² | 1.013 × 1011 nD |