Convert Darcy to Microdarcy
Convert Darcy (D) to Microdarcy (µD) instantly and accurately.
Conversion Formula
µD = D × 1000000
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 Microdarcy
The microdarcy (µD) equals 10⁻⁶ D ≈ 9.869 × 10⁻¹⁹ m², used for tight gas sands, coalbed methane matrix, and low-permeability carbonates. North Sea tight sandstones: 0.01-1 µD; coalbed methane matrix: 1-100 µD; mudrock caprocks: 0.001-1 µD. 1 µD = 10⁻³ mD = 10³ nD.
Quick Reference Table
| Darcy (D) | Microdarcy (µD) |
|---|---|
| 1 D | 1000000 µD |
| 2 D | 2000000 µD |
| 5 D | 5000000 µD |
| 10 D | 10000000 µD |
| 25 D | 25000000 µD |
| 50 D | 50000000 µD |
| 100 D | 100000000 µD |