FIELD: oil-and-gas industry.
SUBSTANCE: proposed composition comprises complex surfactant Neftenol "ВВД" or nonionic surfactant "АФ"9-12 or NP-40, or NP-50, or mix of said non-ionic surfactant - "АФ"9-12 or NP-40, or NP-50 and anion-active surfactant - volgonat or sulphanol, or NPS-6, carbamide, water, dry acid reagent netrol, wt %: Neftenol "ВВД" 1.0-5.0, carbamide 8.0-20.0, netrol 5.0-10.0, water making the rest. Or said non-ionic surfactant 1.0-2.0, carbamide 8.0-20.0, netrol 5.0-10.0, water making the rest, or said non-ionic surfactant 1.0-2.0, said anion-active surfactant 0.5-1.0, carbamide 8.0-20.0, netrol 5.0-10.0, water making the rest.
EFFECT: better oil-sweeping properties, increased permeability of the bed carbonate collector.
8 ex, 1 tbl, 3 dwg
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