FIELD: technological processes.
SUBSTANCE: present invention relates to the extraction of underground resources such as oil, natural gas, shale gas, when using hydraulic fracturing. Method of extraction of underground resources by injecting a fluid medium that fills the ore supply channel, in which cracks are formed and then, using the formation or growth of cracks, underground resources are extracted through cracks, the hydrolysis blocking agent is injected under pressure into a fluid to block the diverting agent serving to temporarily overlap the cracks, where the hydrolysis blocking agent is a hydrolysis-capable resin having a glass transition temperature (Tg) lower than the ambient extraction temperature, and capable of hydrolysis of the resin used as a blocking hydrolysis agent, has a crystallization index ΔHm of not more than 70 J/g, represented by the above calculation formula. Agent blocking hydrolysis to be added to the fluid, which fills the ore supply channel, which is a copolymerized polyoxalate, in which the dibasic acid unit is introduced, other than oxalic acid, and where the agent blocking the hydrolysis has a crystallization index ΔHm of not more than 70 J/g, represented by the above calculation formula. Invention is developed in subclaims.
EFFECT: high efficiency of processing.
6 cl, 5 ex, 1 tbl, 5 dwg
