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<p>When drilling into rock containing a&#xa0;productive hydrocarbon reservoir, it is often necessary to select the appropriate drill bit diameter for the cutting tool. In this paper, a&#xa0;dynamic finite-element method is used to simulate drilling of carbonated core containing healed fractures. The elastic-brittle model is used. An analysis of the results shows that for all the considered sets of cores with healed fractures, the ratio of the number of fractured elements to the total number of fractured elements in 80 mm diameter cores exceeds that for 100 mm diameter cores. Therefore, drilling with a&#xa0;100 mm diameter drill bit will reduce the probability of core damage compared to an 80 mm diameter drill bit.</p>

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Justification of the drill bit diameter choice based on numerical modeling of fracture of carbonated kerns with healed cracks

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • M. O. Eremin

摘要

When drilling into rock containing a productive hydrocarbon reservoir, it is often necessary to select the appropriate drill bit diameter for the cutting tool. In this paper, a dynamic finite-element method is used to simulate drilling of carbonated core containing healed fractures. The elastic-brittle model is used. An analysis of the results shows that for all the considered sets of cores with healed fractures, the ratio of the number of fractured elements to the total number of fractured elements in 80 mm diameter cores exceeds that for 100 mm diameter cores. Therefore, drilling with a 100 mm diameter drill bit will reduce the probability of core damage compared to an 80 mm diameter drill bit.