METHOD FOR DEVELOPING OIL DEPOSIT Russian patent published in 1996 - IPC

FIELD: oil production. SUBSTANCE: oil is extracted through producing wells, a part of producing wells are changed over to injection wells and working agent is injected thought the injection wells. Development zones are selected on the deposit. The zones are restricted with lowered, saturated with water stratum sections. Direction of natural block disintegration formed by vertical fractures is determined. Oil is extracted until 0.50 - 0.65 stratum pressure of initial one is achieved. Then up to 20 % of producing wells are changed over to be injection. Rows of injection wells are formed perpendicular to the direction of natural block disintegration. In so doing producing wells with shooting in the area of increased permeability of oil bearing stratum are chosen or additional wells are shot in this zone or in water bearing zone to be changed over. Working agent of 1.14 - 1.15 gram per cubic centimeter density is pumped in. In particular Tournaisian water of 1.14 - 1.15 gram per cubic centimeter density is used as working agent. The working agent is pumped in cyclic manner and alternately in injection wells of different development zones during 10 - 20 days. EFFECT: high productivity of oil stratum. 2 cl