METHOD OF LOW PERMEABLE SCREEN CREATION IN POROUS MEDIA OF UNDERGROUND GAS STORAGE Russian patent published in 2009 - IPC B65G5/00 

FIELD: oil-and-gas production.

SUBSTANCE: foam generating solution pumped into injection well till it appears in relief wells. Previously add different markers into pumped solution, each of them corresponds to particular injection well. Then supply injection wells with gas for foam generating. Withdraw stratum liquid from relief wells with a total production rate greater than pumping foam generating solution total consumption rate. Pump foam generating solution into relief wells with their following gas supply for foam generation. Pump foam generating solution with marker into injection well continues till it appears in according injection well and at least one of the relief wells. Pumping of foam generating solution into relief wells begins after appearing of foam generating solution with markers, which correspond at least to two injection wells.

EFFECT: increase of the screen homogeneity, decrease foam generating solution consumption.

4 tbl, 4 dwg