Convert Nanodarcy to Darcy
Convert Nanodarcy (nD) to Darcy (D) instantly and accurately.
Conversion Formula
D = nD × 1.000000000e-9
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 Darcy
The darcy (D) ≈ 9.869 × 10⁻¹³ m², the oilfield-standard permeability unit defined by Darcy's law: 1 D passes 1 cm³/s of 1 cP fluid through 1 cm² cross-section under a 1 atm/cm gradient. Highly permeable consolidated sandstone: 1-5 D; unconsolidated sand: 5-20 D. 1 D = 1 000 mD ≈ 0.9869 µm².
Quick Reference Table
| Nanodarcy (nD) | Darcy (D) |
|---|---|
| 1 nD | 1 × 10-9 D |
| 2 nD | 2 × 10-9 D |
| 5 nD | 5 × 10-9 D |
| 10 nD | 1 × 10-8 D |
| 25 nD | 2.5 × 10-8 D |
| 50 nD | 5 × 10-8 D |
| 100 nD | 1 × 10-7 D |