FIELD: oil production industry, particularly for water isolation, oil inflow intensification and reservoir recovery increase.
SUBSTANCE: method involves preliminarily saturating highly-watered channels with coagulant, namely 20% calcium chloride solution; injecting buffer fresh water layer; supplying givpan, namely polyacrylonitrile fiber or web waste hydrolyzed in alkali; injecting fresh water and performing hydrochloric acid treatment by injecting mixture of hydrochloric acid and magnesium chloride heated to 85°C into well bottom zone. The magnesium chloride concentration in the mixture is 4.9-11.2%.
EFFECT: increased efficiency of reservoir treatment.
4 tbl
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