DEVELOPMENT METHOD OF NON-HOMOGENEOUS OIL DEPOSIT Russian patent published in 2014 - IPC E21B43/30 E21B43/26 E21B43/20 

FIELD: oil and gas industry.

SUBSTANCE: development method of non-homogeneous oil deposit includes drilling as per any famous pattern of vertical, horizontal or directional wells. Borders of zones with various permeability are determined. The well pattern is compacted up to the value of 4 ha per a well. A displacement fluid is injected to each zone through injectors and the product is recovered from the formation in each zone through producers. At that zones with different permeability are divided into low permeable, medium permeable and high permeable. Compaction of the well pattern is made only in low permeable zones. At that the ratio of injectors and producers is selected as at least 1:5 in the high permeable zones, from 1:3 up to 1:5 in the medium permeable zones and from 1:1 up to 1:3 in the low permeable zones. When the flow rate at one zone becomes lower than the commercial production hydrofracturing is made at this site. Then permeability is determined at this site and it is referred to the respective zone with determination of the respective number of injectors and producers.

EFFECT: intensifying recovery in the low permeable zones and increasing oil recovery factor.

1 ex, 1 dwg