METHOD OF WATER PRODUCTION SHUT-OFF IN OIL AND GAS PRODUCING WELLS AND EQUALISATION OF INJECTIVITY PROFILE IN PRESSURE VERTICAL AND HORIZONTAL WELLS AT PRESENCE OF SUPER FRACTURES AND HIGH PENETRABLE BEDS AND COMPOSITION FOR IMPLEMENTATION OF THIS METHOD Russian patent published in 2009 - IPC E21B33/138 E21B43/22 

FIELD: mining.

SUBSTANCE: method consists in pumping of foaming solution and gel-forming composition in well when super-fractures and high penetrable beds occur. Notably that first high resistant three-phase foaming systems are pumped, where foaming solution presents a liquid phase, compressed air or nitrogen are gaseous phase, which is supplied with a degree of saturation within limits of 3-1, and solid phase is presented with a fine dispersed material, for example cement at amount of 20-30% from the volume of liquid phase. After pumping foaming system, further non-foaming gel-forming composition is pumped. The composition of foaming solution consists of foam former on base of neonol AF9-12 and monoethylenglycol at ratio 1:1, methylcellulose (MC-100), carbamide, sodium carbonate.

EFFECT: increased efficiency of processes directed to equalisation of profile of injection capacity of pressure wells and isolation of water production, also increased stability of foaming systems and their extended assortment.

4 cl, 1 tbl