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Mechanisms of shale hydration and water block removal
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ZENG Fanhui,ZHANG Qiang,GUO Jianchun,ZENG Bo,ZHANG Yu,HE Songgen
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Table 2. Comparison of the effect of different soaking times on reservoir stimulation.
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| Well Area | Well No. | Vertical Depth/m | Horizontal section length/m | Stage number | Montmorillonite content/% | Illite content/% | Optimal soaking time/d | Field soaking time/d | Production/(104 m3?d-1) | | A | A-1 | 2590 | 1478 | 22 | 7.4 | 18.3 | 5 | 5 | 21.1 | | A-2 | 2620 | 1505 | 23 | 5.6 | 20.1 | 5 | 10 | 21.2 | | B | B-1 | 2780 | 1400 | 29 | 22.1 | 9.2 | 10 | 10 | 40.1 | | B-2 | 2750 | 1500 | 34 | 20.4 | 10.4 | 10 | 15 | 29.7 |
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