METHOD OF ACIDISING OF HOLEBOTTOM AREA TREATMENT OF TERRIGENOUS COLLECTOR Russian patent published in 2010 - IPC E21B43/27 

FIELD: oil-and-gas production.

SUBSTANCE: method includes contiguous pumping of hydroxo-chloride aluminium-HCA, buffer layer of sweet water in volume of oil-well tubing-OWT, polymer composition, the second buffer layer of sweet water and acid composition, additional preprocessing of well up to bottomhole by organic vehicle, between introduction of the second buffer layer of sweet water and acid composition - additional pumping of HCA, isolation during 24 hours and contiguous pumping of the third buffer layer of sweet water, herewith the first introduction of HCA is implemented in the volume, equal 1/3 from rated, ands the second - in remain volume from rated. In the capacity of polymer compound it is used polymer aquatic multigrade - PAM with 0.1-0.5% "НПАВ", in the capacity of acid composition - mixture, containing, wt %: inhibited hydrochloric acid 9-15, hydrofluoric acid 2-5, water is the rest, or mixture, containing, wt %: inhibited hydrochloric acid 9-15, hydrofluoric acid 2-4, organic vehicle 5-30, water is the rest, in the capacity of "НПАВ" - Neonol, and in the capacity of organic vehicle - "Reagent-Glycoil" or Flotoreagent-Oxal T-66.

EFFECT: increased efficiency of treatment method of wellbore of terrigenous reservoir.

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