Results of the work performed 2
Treatment of Wells in an Operating Block at the Active Leaching Stage
Lithology: sandy and clayey–sandy formations (angular, clayey, fine-grained, and coarse-grained sands; interbeds of brown coal are present, as well as layers of dense angular clays; the zone of the 31st injection row contains angular sands of mixed grain size).
According to the graphs, after treatment the total injectivity of seven wells in the 31st injection row increased from 3.4 to 18.3 m³/h (a 430% increase), while the total injectivity of fourteen wells in the 33rd injection row increased from 16.24 to 52.04 m³/h (a 220% increase).
After treating the 17th well of the 34th production row, its injectivity changed from 0.4 to 3.2 m³/h (a 700% increase). At the same time, the production rate of the 34th row increased from 35 to 45 m³/h (a 29% increase), and the production rate of the 32nd row rose from 50 to 65 m³/h (a 30% increase).
The solution quality did not deteriorate with the increased production rate during monitoring; moreover, a trend toward higher concentration of the useful component in the solutions was observed. Extraction of the useful component in the reverse block increased by 29.5%.
Stable operation of the submersible pumps in the 32nd row was restored (pulsations caused by insufficient production flow were eliminated).