ANALYSIS OF CAUSES AND METHODS OF SOLVING COMPLICATIONS IN URANIUM IN-SITU IN-SITU LEACHING TECHNOLOGY
Abstract
The study examines the operational features of in-situ leaching (ISL) technology applied to the extraction of non-ferrous metals. The process chain is characterized by the injection of a leaching solution through specially drilled wells into the ore-bearing horizon, followed by the dissolution of target minerals and their subsequent recovery to the surface via production wells. In the course of ISL system operation, a number of typical complications arise, including clogging of the near-well zone, gas breakthrough, sanding phenomena, and scaling in tubing strings. These factors significantly influence the filtration regime and hydrodynamic behavior of the productive formation, which makes it necessary to regularly adjust and optimize the operating parameters. The paper highlights different categories of interventions aimed at enhancing system efficiency: chemical treatments, combined physico-chemical methods, as well as mechanical cleaning and rehabilitation of wells and downhole equipment. It is argued that sustainable and long-term operation of ISL systems can only be ensured through integrated application of these approaches, which reduces the risks of failures and extends the service life of wells. The research outcomes provide a methodological basis for improving the design and further optimization of ISL systems at both operating and newly developed deposits.
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