TREATMENT METHOD OF BOTTOM-HOLE FORMATION ZONE Russian patent published in 2013 - IPC E21B43/27 C09K8/42 C09K8/74 

FIELD: oil and gas industry.

SUBSTANCE: in a treatment method of a bottom-hole formation zone, which involves pumping to the formation of acid-oil emulsion of reverse type and acid, as acid-oil emulsion of reverse type there used is emulsion containing the following components, wt %: dispersion medium - hydrocarbon liquid 31-38, emulsifier - reaction products of aliphatic amines of fat acids of hydrated tall oil with hydrochloric acid in terms of amines 0.02-0.08, dispersion medium - synthetic, inhibited hydrochloric acid (10-18%) is the rest.

EFFECT: enlarging application area of the proposed method, use in wider range of formation temperature, use for well any water content of the extracted product, including increased water content, shortening of time required for treatment process, improving efficiency of influence on low-permeability productive zones of the formation, preventing secondary formation of emulsions under formation conditions after treatment, and reducing emulsifier consumption and use of a more technological method of emulsion preparation on a well.

7 cl, 21 tbl, 1 dwg