DEVELOPMENT METHOD OF HETEROGENOUS OIL-BEARING FORMATION Russian patent published in 2009 - IPC E21B43/30 

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to petroleum industry and can be used at development of heterogenous oil-bearing formation. According to the method it is placed in bunch extractive and injection wells by seven-spot flooding system with central injection well. There are drilled boreholes of multi- bottomhole producers. It is pumped working substance through the injection wells and oil is extracted through producers. Boreholes of multi- bottomhole producers are placed on-the-mitre more than 200 to the direction of natural fracture. Distance from central injection well up to entry point into stratum of multi- bottomhole producer, located from central injection well in the direction of natural fracture, it is installed for 10-20% more, than distance from ocentral injection well up to point-of-entry into stratum of multi- bottomhole producer, located from central injection well perpendicularly to the direction of natural fracture.

EFFECT: increasing of deposit's oil recovery.

1 ex, 1 dwg