COMPOSITION FOR ACID TREATMENT OF BOTTOM ZONE OF FORMATION

摘要

FIELD: oil and gas production. SUBSTANCE: invention consists in consecutively pumping in, into oil formation, edge of solvent for removing asphalt-tar and paraffin deposits (for particular oil field) and acid solution containing hydrofluoric acid and/or hydrochloric acid (95-99.5 wt % in sum) and a special reagent (0.5-5 wt %), weight ratio of solvent edge to acid solution ranging from 2: 1 to 0.5:1. EFFECT: enhanced efficiency. 3 cl, 3 tbll