Temporary plugging technology is widely used in the volume fracturing of horizontal wells. However, conventional temporary plugging balls and particles can’t effectively plug perforations during fracturing. This research designed a completely degradable, tassel-shaped rope knot temporary plugging agent, and it has an excellent degradation and plugging performance. The knot temporary plugging agent’s solubility, crushing rate, temperature and shear resistance were evaluated. The knot temporary plugging agent can completely degrade into CO2 and water in a clean water environment. According to the physical model of the transparent tube, the knot temporary plugging agent can quickly enter the perforation with the help of the tassel-shaped wings to form an effective plugging. Compared with the conventional temporary plugging ball, the ability to enter the perforation and the plugging performance were superior. The field application of the knot temporary plugging agent in MaHW#5 well showed that the temporary plugging effect was good.
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Acknowledgments
This work was supported by the 2020-2022 major research projects for improving the volume transformation technology of horizontal wells (Upgrading and field test of shale/tight oil and gas volume transformation technology in Xinjiang Oilfield).
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Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 3, pp. 109–114 May–June, 2022.
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Xu, J., Wang, J., Wang, M. et al. Performance Research and Field Application of the Knot Temporary Plugging Agent. Chem Technol Fuels Oils 58, 544–553 (2022). https://doi.org/10.1007/s10553-022-01418-z
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DOI: https://doi.org/10.1007/s10553-022-01418-z