METHOD OF DEVELOPMENT OF OIL DEPOSIT BY AREA SYSTEM Russian patent published in 2020 - IPC E21B43/20 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry and can be used in additional development of oil deposit during water displacement. Method for development of oil deposit by an area system, which includes drilling of design number of injection and production wells, flooding of deposit and extraction of oil to surface with subsequent drilling of additional shafts from old wells, which are flooded below limit of profitable operation, into area of stagnant oil zones, location of which is determined by simulation. At watering of additional boreholes their productive part length is changed during operation, isolating intervals of water supply. Area of stagnant oil zones is determined taking into account of non-uniformity of permeability on the sides of the light, and during the deposit investigation, additionally determining areas of dome elevations, wherein an additional barrel directed into the dome-elevated area is drilled with a zenith angle of more than 90° in the direction of maximum hypsometric marks of the corresponding dome-elevated area. During simulation, zones and modes of injection may be determined, which ensure maximum production at minimum water cut of the product after construction of additional shafts. Additional pressure shafts are constructed into these zones from the nearest wells, which provide communication with appropriate discharge zones for implementation of corresponding water injection modes through them.

EFFECT: method widens field of application and intensifies production of deposit products, including in areas of dome elevations.

1 cl