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Formation of fractures in carbonate rocks by pad acid fracturing with different states of carbon dioxide
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GUO Jianchun,ZHAN Li,GOU Bo,ZHANG Ran,LIU Chao,LI Xiao,REN Jichuan
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Table 3. Parameters of experimental schemes.
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| No. | Natural fracture | In-situ stress/MPa | Fracturing fluid | Injection rate/(mL•min-1) | | σH | σh | σv | | 1 | Yes | 9 | 7 | 8 | Water | 40 | | 2 | No | 9 | 7 | 8 | Water | 40 | | 3 | No | 9 | 7 | 8 | Liquid CO2 | 40 | | 4 | Yes | 9 | 7 | 8 | Liquid CO2 | 40 | | 5 | Yes | 9 | 7 | 8 | Liquid CO2 | 40 | | 6 | No | 9 | 7 | 8 | Supercritical CO2 | 40 | | 7 | No | 9 | 7 | 8 | Supercritical CO2 | 40 | | 8 | No | 19 | 15 | 17 | Supercritical CO2 | 40 |
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