FIELD: oil industry.
SUBSTANCE: invention relates to the oil industry, a composition for processing a well, a method for producing it, and a method for processing an oil reservoir are used to intensify the production of hydrocarbons from a well by injecting water with the claimed reagent at high speeds into the well, thereby creating a gap in the productive reservoir. The composition is fluid for processing a well containing tetrakis(hydroxyorgano)phosphonium salt, a quaternary ammonium compound, copolymer of unsaturated carboxylic acid and sulfonic acid. The specified copolymer has vinylidene-1,1-diphosphonic acid (VDPA) at the end or contains such monomers included in the main chain of polymer and at least one oxidizing viscosity reducing agent in the amount from 15 ppm to 250 ppm. A method for producing a composition active relatively to microorganisms containing a viscosity reducing agent includes stages of: a. obtaining of the specified composition and b. its dilution. A method for processing an underground reservoir includes a stage of injecting the resulting composition into the reservoir.
EFFECT: invention increases the stability of the composition, which reduces the viscosity of borehole fluid, while controlling the population of microorganisms, and increases the intensification of hydrocarbon production.
11 cl, 10 dwg, 2 tbl, 5 ex
