FIELD: oil industry.
SUBSTANCE: one pumps technologic water solution through key well in jointy-heterogenetic high flooded oil reservoirs, containing mas.%: colloidal silica with silica module 25-70 1.0-2.5, sodium soluble silicat with silica module 2.8-4.5 1.0-2.5, the rest is fresh water. Before and after pumping of technological solution buffer is pumped. After finishing of each cycle of technological solution and buffer pumping, mineralised water is pumped. Then one recovers oil through exploitation well.
EFFECT: oil recovery increasing from high flooded jointy-heterogenetic oil reservoirs.
4 tbl
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