Convert Darcy to Nanodarcy
Convert Darcy (D) to Nanodarcy (nD) instantly and accurately.
Conversion Formula
nD = D × 1000000000
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.
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
| Darcy (D) | Nanodarcy (nD) |
|---|---|
| 1 D | 1000000000 nD |
| 2 D | 2 × 109 nD |
| 5 D | 5 × 109 nD |
| 10 D | 1 × 1010 nD |
| 25 D | 2.5 × 1010 nD |
| 50 D | 5 × 1010 nD |
| 100 D | 1 × 1011 nD |