FIELD: oil and gas production.
SUBSTANCE: solid base for acidic composition contains, wt %: paraformaldehyde 23.00-71.50, copper salt (II) 0.02-0.30, ammonium chloride - the rest. Composition for treatment of bottomhole zone of carbonate bed contains, wt %: the said solid base 20-45, water - the rest.
EFFECT: increased efficiency of treatment of bottomhole zone of bed with carbonate collector due to increased depth of composition penetrating into bed and due to branched network of fluid conducting channels because of reduced rate of composition and bed rock interaction.
3 cl, 4 tbl
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