METHOD FOR ACID TREATMENT OF WELL BOTTOM ZONE

摘要

FIELD: oil production. SUBSTANCE: dissolver for removing asphalt-resin and paraffin deposits and acid solution of hydrofluoric and/or hydrochloric acid and Kapatin agent at volumetric 2:1 up to 0.5:1 ratio of the dissolver and acid solution are pumped into the oil deposit. Dissolver or a mixture of dissolvers able to dissolve the asphalt-paraffin deposits of the appropriate deposit effectively. The acid solution comprises fluoride bearing mixture and Kapatin agent at the following ratio of components (% by weight): 95 - 99.5 fluoride bearing mixture; 0.5 - 5 Kapatin. The fluoride bearing mixture has 2 - 8 % by weight of hydrogen fluoride and 10 - 30 % by weight of hydrogen chloride. EFFECT: more effective dissolving the asphalt-paraffin deposits.