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Boreholes excavated in geological strata are the primary means of accessing underground resources, such as geothermal energy and hydrocarbons. During excavation, if the mud pressure supporting the borehole wall exceeds a critical threshold, the surrounding rock may experience tensile failure (Holt et al. 2015; Lan et al. 2024), resulting in subsequent mud loss. On the other hand, if the mud pressure is insufficient, the surrounding rock may undergo shear or compaction failure due to in situ pressures (Haimson 2007; Hashemi et al. in Eng Geol 183:39–52, 2014; Garavand et al. in Int J Numer Anal Meth Geomech 44:823–850, 2020; Xiang et al. in Int J Rock Mech Min Sci 180, 2024), which could lead to borehole breakout and closure. These failure mechanisms can potentially cause significant economic losses.

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Analyses of Interacting Rate and Scale Effects in Borehole Failure

  • 章节

  • 发表日期：

    2025年

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  • Xilin Lü,
  • Dawei Xue

摘要

Boreholes excavated in geological strata are the primary means of accessing underground resources, such as geothermal energy and hydrocarbons. During excavation, if the mud pressure supporting the borehole wall exceeds a critical threshold, the surrounding rock may experience tensile failure (Holt et al. 2015; Lan et al. 2024), resulting in subsequent mud loss. On the other hand, if the mud pressure is insufficient, the surrounding rock may undergo shear or compaction failure due to in situ pressures (Haimson 2007; Hashemi et al. in Eng Geol 183:39–52, 2014; Garavand et al. in Int J Numer Anal Meth Geomech 44:823–850, 2020; Xiang et al. in Int J Rock Mech Min Sci 180, 2024), which could lead to borehole breakout and closure. These failure mechanisms can potentially cause significant economic losses.