| Structure | Well number | Series of strata | Average fracture (µm) |
Range of fracture (µm) |
|---|---|---|---|---|
| 1# structure |
NP1-80 | Majiagou formation of Ordovician | 4.33 | 2-11 |
| NP1-85 | Majiagou formation of Ordovician | 19.56 | 6.22-51.88 | |
| NP1-86 | Ordovician | 164.40 | 8.11-2714.21 | |
| NP1-5 | Ordovician | 8.00 | 2-18 | |
| NP1-90 | Cambrian system | 21.88 | 2.6-80.9 | |
| NP1 | Ordovician | 13.17 | 3-35 | |
| Average | 38.56 | 2-2714.21 | ||
| 2# structure |
NP280 | Ordovician | 5.55 | 3.8-7.3 |
| NP288 | Lower Majiagou formation of Ordovician | 34.8 | 9.88-62.4 | |
| NP2-82 | Ordovician | 87.13 | 32.62-143.56 | |
| Average | 42.49 | 3.8-143.56 | ||
| 5# structure |
NP5-4 | Ordovician | 3.7 | 3.7 |