METHOD OF INCREASING OIL WELL PRODUCTIVITY Russian patent published in 2001 - IPC

FIELD: methods of treatment of bottom-hole formation zones for restriction of water inflow and higher oil recovery. SUBSTANCE: method includes isolation of water-encroached interlayers in zone of perforation by injection of isolation compositions into producing formation, setting up of cement bridge, drilling of cement bridge, repeated tapping of isolated interlayers. Measurement of producing formation temperature is carried out before and after injection into formation of isolation composition. Repeatedly tapped are those isolated producing interlayers whose temperature remains unchanged or changed slightly. EFFECT: higher reliability of isolation of water-encroached interlayers due to exclusion of their tapping by perforation. 2 cl