METHOD OF DEVELOPMENT OF OIL POOL Russian patent published in 2009 - IPC E21B43/20 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry and can be implemented at return of associated reservoir water and field runoff formed at development and operation of oil and gas deposits. The essence of the invention is disclosed like follows: the method consists in pumping field runoff via pressure wells into a water receiving reservoir, in the capacity of which there is used a reservoir containing water similar to field runoff by a mineralogical composition; the said reservoir is located below a confining layer; then the method consists in maintaining primary pressure of field runoff pumping not below the pressure of natural fractures opening present in the water receiving reservoir. According to the invention a sub-face of a producing reservoir is determined. Associated reservoir water is pumped via the pressure wells into the water receiving reservoir located below the sub-face of the producing reservoir of the oil pool. Changes of volumes and pressure of pumped associated reservoir water is recorded; after stabilisation of modes of pumping in the producing reservoir there is created pressure exceeding its primary value. Also field runoffs or their mixture with associated reservoir water is pumped into the water receiving reservoir located below the water receiving reservoir wherein associated reservoir water is pumped.

EFFECT: upgraded efficiency of development and of ecological safety.

1 ex, 1 dwg