Research Article
Investigation on the CBM Extraction Techniques in the Broken-Soft and Low-Permeability Coal Seams in Zhaozhuang Coalmine
Table 5
Segmentation parameters of horizontal well.
| | No. | Bridge plug location (m) | Segment length (m) | Perforation interval/length (m) | Proppant (m3) | Fracturing fluid volume (m3) | | Fine sand | Medium sand | Rough sand |
| | 1st | 1549 | 92 | 1525-1528/3 | 3.08 | 38.53 | 12.94 | 702 | | 2nd | 1457 | 77 | 1433-1436/3 | 2.04 | 24.42 | / | 523 | | 3rd | 1380 | 119 | 1357-1360/3 | / | 75.98 | / | 1452 | | 1317-1320/3 | | 4th | 1261 | 115 | 1237-1240/3 | / | 43.90 | / | 1584 | | 1194-1197/3 | | 5th | 1146 | 79 | 1121-1124/3 | / | 62.03 | / | 2023 | | 6th | 1067 | 96 | 1044-1047/3 | / | 62.54 | / | 770 | | 7th | 971 | 91 | 947-950/3 | / | 56.43 | 10.39 | 814 | | 8th | 880 | 94 | 856-859/3 | / | 55.87 | 9.73 | 853 |
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