METHOD OF DEVELOPING MULTI-BED MASSIVE OIL DEPOSIT Russian patent published in 2012 - IPC E21B43/14 E21B43/20 

FIELD: oil and gas production.

SUBSTANCE: proposed method comprises defining oil deposit geological and physical conditions and ranging oil bands to decrease in bed permeability, primary exposure of oil beds by drilling, completing and setting up to lift bed fluid and injecting displacement fluid to maintain bed pressure. In compliance with this invention, at least one well is drilled to expose every bed in dome and bottom sections by vertical and horizontal sections of the well. Well horizontal section is arranged parallel with and above oil-water contact. In completing the well, simultaneous secondary exposure of oil beds in horizontal and vertical bottomhole sections is carried out starting from oil bed with maximum water permeability. Every next oil bed is exposed another time as previous bed is depleted to residual reserves equal to initial reserves of the next oil bed with due allowance for the difference in their water permeability. Well is set up to inject displacement fluid into borehole horizontal section with simultaneous lift of bed fluid from well vertical section.

EFFECT: higher efficiency.

1 ex, 1 dwg