FIELD: oil and gas industry.
SUBSTANCE: method involves obtainment of nuclei of oxidising compound, which are obtained by granulation in fluidised bed with atomisation; atomisation of water solution of metal silicate on nuclei of oxidising compound in fluidised bed, where water solution of metal silicate contains at least 15 wt % of metal silicate, and drying so that the covering coat of metal silicate is obtained on nuclei of oxidising compound. Granule obtained by means of the above method. Working liquid for well treatment, which contains at least one hydrated polymer, thickening agent to control the liquid viscosity, above described granules. Hydraulic fracturing method of underground formation, which involves introduction of fracturing liquid being the above described treatment liquid; formation of fractures, dilution of granules; reduction of liquid viscosity and removal of liquid from the formation. Cleaning method of waste water mud or dehydrated waste, which involves their contact with the above described granules. Invention is developed in dependent claims.
EFFECT: increasing stability and effectiveness of granules.
23 cl, 16 ex, 6 tbl, 6 dwg
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