FIELD: oil and gas production.
SUBSTANCE: procedure consists in supply of primary leaching solutions into treated object through system of evacuation downholes, in preparation of secondary active leaching solutions out of them directly in region of contact with treated object and in evacuation of productive solutions through system of evacuation downholes with successive extraction of valuable components from solutions. Intermediate solutions of two kinds are prepared out of primary leaching solutions before their pumping into downholes. Alkali solutions containing sodium hypochlorite are prepared in the electro-chemical reactor, while acid solutions containing hydrogen chloride and/or hydrogen peroxide with presence of hydroxyl-radicals in composition are prepared in the photo-electro-chemical reactor. Intermediate solutions are supplied into upper and lower parts of near-filter zone and/or with cyclic change of their supply into the upper part of the near-filter zone.
EFFECT: raised efficiency of leaching.
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