Table 1
Information of tight sandstone samples in Huaqing area.
| Sample | Depths/m | Porosity/% | Permeability/×10−3 µm2 | Pore throat median radius/nm | Reservoir types | Lithology | Cores oil-bearing level |
|---|---|---|---|---|---|---|---|
| S2 | 2138.1 | 15 | 1.25 | 850 | 1 | Gray-brown fine sandstone | Immersion |
| S3 | 2192.6 | 11.08 | 0.521 | 200 | 3 | Gray-brown fine-silt sandstone | Immersion |
| S4 | 2174.53 | 12.4 | 0.096 | 80 | 4 | Gray-brown siltstone | Oil trace |
| S5 | 2242.4 | 10.2 | 0.406 | 430 | 3 | Gray fine sandstone | Oil spot |
| S6 | 2235.6 | 9.69 | 0.11 | 370 | 4 | Gray-brown siltstone | Oil trace |
| S7 | 2062.2 | 11.18 | 0.74 | 790 | 2 | Gray fine sandstone | Immersion |
| S8 | 2287.45 | 11.68 | 0.568 | 465 | 3 | Gray-brown fine sandstone | Immersion |
| S9 | 2189.4 | 13 | 0.524 | 730 | 3 | Gray-brown fine sandstone | Immersion |