CREATION METHOD OF LOW-PREMEABILITY OF SCREEN IN POROUS MEDIUM Russian patent published in 2010 - IPC E21B43/32 B65G5/00 

FIELD: oil-and-gas production.

SUBSTANCE: it is implemented preparation of injection well in insulated area by path close to roof cladding configuration of insulated area of stratum. Then it is pumped into it solution of foam maker with following feeding of gas for foaming. It is defined minimal horizontal lateral dimension of screen from conditions of filtration through the screen of gas and/ or water considering pressure gradient at the boundaries of screen at the period equal to period maximal pumping into gas storage or maximal permissible withdrawal of gas from particular storage. Minimal vertical dimension if screen is considered equal to value which is not less than maximal dimension from roof of formation up to gas-water contact in the area of screen creation. In preference it is implemented injection well making, path of which is normal to vector of average speed of formation fluid in isolated area of stratum. Preferentially it is also implemented making of inclined and/or horizontal injection well.

EFFECT: reliability growth of operating characteristics of screen, reduction of foam former consumption and gas amount, used for foaming and consumptions for wells drilling.

3 cl, 3 tbl, 1 ex, 3 dwg