FIELD: oil production. SUBSTANCE: method includes preparation of insulating compound containing mas.%: commercial lignosulfonate LST 75-95 and hydrochloric acid 5-25. 20-24% acid is introduced into lignosulfonate LST and mixture is stirred for 5 min. Compound is injected into formation. Formation is heated up to 170-210 C, e.g., by burning powder charge ADS-7. EFFECT: insulating barrier offer high adhesion properties with high resistance to aggressive formation media at different formation pressures including abnormally high. 2 tbl
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