Table 2. TOC, Total Gas Content, and Pore Structure Parameters of the Main Developed Shale Lithofacies in the Study Area.
| lithofacies |
pore structure parameters |
||||||
|---|---|---|---|---|---|---|---|
| type | TOC rank | specific surface area/(m2/g) | pore volume/(mL/g) | pore diameter/nm | porosity/% | total gas content/(m3/t) | TOC/% |
| I2 | medium | 24.35 | 0.0363 | 9.73 | 4.41 | 2.68 | 3.37 |
| high | 28.55 | 0.0397 | 8.90 | 5.03 | 3.17 | 5.08 | |
| II1 | ultra-low | 20.66 | 0.0359 | 9.79 | 4.52 | 1.66 | 0.96 |
| low | 23.52 | 0.0374 | 9.55 | 3.19 | 2.09 | 2.55 | |
| medium | 25.44 | 0.0371 | 9.34 | 4.23 | 2.99 | 3.35 | |
| II2 | ultra-low | 21.11 | 0.0361 | 9.84 | 3.97 | 1.54 | 1.05 |
| low | 22.44 | 0.0283 | 8.06 | 4.17 | 1.56 | 2.37 | |
| II6 | low | 21.90 | 0.0340 | 9.90 | 1.28 | 1.67 | 2.57 |
| medium | 23.40 | 0.0320 | 9.00 | 3.09 | 3.04 | 3.3 | |