FIELD: oil and gas industry.
SUBSTANCE: treatment method of an underground formation by fluid involves obtainment of fluid containing a stitching agent of the specified structural formula, which is formed as a result of a reaction of 1,4-benzene diboronic acid with 2-hydroxy-4-aminobenzoic acid, and polysaccharide or material based on cellulose, which involves oxidised functional groups, and injection of fluid to a shaft of a well passing through the formation, and provision of contact of fluid with the formation. Invention has been developed in dependent claims.
EFFECT: improving modification efficiency of viscosity at wide temperature and pressure intervals.
11 cl, 20 ex, 1 tbl, 2 dwg
