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<p>The productivity decline of technological wells during in situ leaching (ISL) is primarily associated with clogging of well filters and the near-filter zone, leading to a significant increase in hydraulic resistance and reduction in injectivity. Field observations indicate that injectivity loss in ISL wells can reach 30–70% after 2–3 years of operation.</p><p>This paper presents an experimental study on restoring well productivity using explosive declogging with optimized multi-strand detonation cord charges. The method was tested on 6 technological wells under field conditions, combined with controlled polygon experiments.</p><p>The study examined detonation cords with a linear explosive density of 12–20&#xa0;g/m (PETN core) in configurations of 1 to 4 strands. A configuration of two parallel strands (≈ 15&#xa0;g/m each) was identified as optimal, providing efficient disruption of clogging deposits while preserving the structural integrity of the filter.</p>

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Enhancement of technological well productivity during in situ leaching using optimized multi-strand detonation cord charges (12–20 g/m): experimental study

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月29日

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  • Sherzod Zairov,
  • Maksud Mekhmonov,
  • Ravshanova Mukhabbat,
  • Shukhrat Tadjiev,
  • Gaibnazarov Bakhrom

摘要

The productivity decline of technological wells during in situ leaching (ISL) is primarily associated with clogging of well filters and the near-filter zone, leading to a significant increase in hydraulic resistance and reduction in injectivity. Field observations indicate that injectivity loss in ISL wells can reach 30–70% after 2–3 years of operation.

This paper presents an experimental study on restoring well productivity using explosive declogging with optimized multi-strand detonation cord charges. The method was tested on 6 technological wells under field conditions, combined with controlled polygon experiments.

The study examined detonation cords with a linear explosive density of 12–20 g/m (PETN core) in configurations of 1 to 4 strands. A configuration of two parallel strands (≈ 15 g/m each) was identified as optimal, providing efficient disruption of clogging deposits while preserving the structural integrity of the filter.