METHOD FOR FIXING THE BOTTOM-HOLE ZONE OF PRODUCTIVITY OF THE GAS WELL FORMATION Russian patent published in 2022 - IPC E21B33/138 E21B43/22 

FIELD: gas industry.

SUBSTANCE: invention relates to the gas industry, in particular to methods for fastening the bottom-hole zone of the productive formation of gas wells. The method is characterized by the fact that the pipe space of the well with an inert gas source is previously tied at the mouth, and the annular space with an aerosol flow generator. Then, an inert gaseous agent is injected through the pipe space for at least 0.5 hours until the established mode of filtration of the inert gas into the reservoir, at a pressure exceeding the reservoir pressure 1.5-2.0 times, but not exceeding the hydraulic fracturing pressure. Next, the inert gaseous agent is simultaneously injected through the pipe space and the fixing composition in the aerosol state through the annular space of the well. In this case, the fixing compound in the aerosol state is injected in a volume equal to 0.5-0.8 of the pore volume of the treated zone, at a pressure exceeding the value of the injection pressure of the inert gaseous agent by 0.1 - 0.5 MPa. After that, the inert gaseous agent is continued to be pumped simultaneously through the pipe and annular space until the fixing composition is completely structured on the walls of the filtration channels.

EFFECT: increase in the efficiency of fastening the bottom-hole zone of the productive formation of gas wells with the provision of maximum preservation of the filtration characteristics of the bottom-hole zone of the productive formation, an increase in the depth of processing of the bottom-hole zone of the formation, an increase in the efficiency of the functioning of the well by extending its service life.

1 cl, 1 ex, 1 tbl