METHOD FOR CREATING AND OPERATING AN UNDERGROUND GAS STORAGE FACILITY IN A WATER-BEARING GEOLOGIC STRUCTURE

The invention relates to methods of management of an underground storage facility for natural gas in water-bearing geological structures and, in particular, to physicochemical methods for controlling the movement of gas-water contact (GWC) during gas extraction from an underground storage facility. In the water-bearing geological structure, the estimated number of production wells in the upper zone of the water-bearing structure and one multihole well in the central part are drilled up to the level of the design GWC, through which 2 and more side horizontal legs are implemented at the level of the design GWC. Natural gas is injected through production wells until the GWC reaches the hypsometric marks, and then the gas is sequentially injected to the central well with horizontal legs in the gas-water contact of water solution of foaming surfactants, further natural or non-hydrocarbon gas is injected, that is similar to natural gas in its physicochemical properties. The volumes of the water solution of foaming surfactants and gas are selected in such ratios, which form the estimated value of a stable low-permeable areal screen during mechanical mixing and collaborative filtration in reservoir bed conditions. The volumes of water solution of foaming surfactants and natural or non-hydrocarbon gas are in the ratio 1 : 16. The technical result involves improving the efficiency of natural gas storage by increasing the active volume of gas and extending the mode of dry cyclic operation of UGSF at the increased rates of gas extraction. L'invention porte sur des procédés de gestion d'une installation souterraine de stockage de gaz naturel dans des structures géologiques aquifères et, en particulier, sur des procédés physico-chimiques permettant de limiter le déplacement d'un contact gaz-eau (GWC) pendant l'extraction de gaz à partir d'une installation souterraine de stockage. Dans la structure géologique aquifère, le nombre estimé de puits de production dans la zone supérieure de la structure aquifère et un puits à trous multiples dans la partie centrale sont forés jusqu'au niveau du GWC de calcul, à travers lesquels au moins deux branches horizontales latérales sont disposées au niveau du GWC de calcul. Du gaz naturel est injecté dans les puits de production jusqu'à ce que le GWC atteigne les marques hypsométriques, puis le gaz est injecté séquentiellement dans le puits central, les branches horizontales étant dans le contact gaz-eau, conjointement avec de la solu