DEVELOPMENT METHOD OF OIL FIELD WITH WATER-OIL ZONES Russian patent published in 2010 - IPC E21B43/16 

FIELD: oil-and-gas production.

SUBSTANCE: method includes perforation of casing string in oil-saturated zone of producing stratum, installation of packer, installation in well of deep-well working barrel, pumping of oil from oil-saturated zone and sampling of strata fluid from well on surface. Perforation of casing string in oil-saturated area of producing formation is implemented with separation of producing formation for two part. It is installed packer at a distance from two to five metres higher than water-oil contact. Then it is installed deep-well working barrel of double-acting over producing formation so that suction valve of pump is located higher than installed packer in top part of producing formation. In the process of extraction of strata liquid part of withdrawn oil from top part of producing formation it is pumped into producing stratum lower than packer.

EFFECT: oil-extraction increasing, increasing nonaqueous operation period of well ensured by reduction of watering of extracted production, increasing of coefficient of comprehension by generation of oil stores, prevention of coning and reduction of incentive consumptions for extraction of oil ensured by overlap of function producing and injecting wells.

1 dwg, 1 ex