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- W4300472932 abstract "Hydraulic fracturing of shale formations has led to energy boom both in China and abroad. Currently, water is regularly used as fracturing fluid in commercial shale gas and oil production, but it has raised concerns in many aspects such as environment and reservoir protection. Supercritical CO<sub>2</sub>, as a non-aqueous fracturing fluid, combined with coiled tubing fracturing technology, can effectively increase shale gas production, shorten operation period, reduce cost, conserve water resources, and minimize environmental impacts. Firstly, the process of supercritical CO<sub>2</sub> fracturing with coiled tubing of shale gas formation was introduced, and the potential advantages of using CO<sub>2</sub> as working fluid in coiled tubing fracturing of shale gas formation were analyzed, including enhanced fracturing and fracture propagation, reduction of flow-blocking, increased desorption of methane adsorbed in organic-rich parts of the shale, and a reduction or elimination of the deep re-injection of flow-back water that has been linked to induced seismicity and other environmental concerns. In addition, shale gas formations may also become a major utilization option for carbon sequestration. Then, the computational fluid dynamics were applied to simulate the flow fields inside cavity of supercritical CO<sub>2</sub> fracturing with coiled tubing, and the pressure boost capability was verified. By comparing the pressure boost effects of water fracturing and supercritical CO<sub>2</sub> fracturing, it could be concluded that supercritical CO<sub>2</sub> fracturing with coiled tubing has stronger pressure boost effect than water fracturing under the same conditions. The research and development status of supercritical CO<sub>2</sub> fracturing equipment and field test were also analyzed. The research results can provide references for the application of supercritical CO<sub>2</sub> fracturing with coiled tubing in shale gas formations and the development of related tools." @default.
- W4300472932 created "2022-10-03" @default.
- W4300472932 creator A5044544424 @default.
- W4300472932 date "2022-01-01" @default.
- W4300472932 modified "2023-10-06" @default.
- W4300472932 title "Analysis of Supercritical CO<sub>2</sub> Coiled Tubing Fracturing Technology for Shale Gas Formation" @default.
- W4300472932 doi "https://doi.org/10.11648/j.ajche.20221003.11" @default.
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