WELL FOR DEVELOPMENT OF OIL FORMATION Russian patent published in 2017 - IPC E21B43/20 

FIELD: oil and gas industry.

SUBSTANCE: well for development of oil formation comprises vertical and lateral columns, a tubing string (tubing) for pumping a displacement agent into a production formation, and equipment for lifting oil to a wellhead. The well is configured with h-shaped profile. The diversion point of the lateral column from the well vertical part is taken at 300-500 m distance from the production oil formation. The distance from the lateral column entry point to the production oil formation, up to the point where the well vertical part enters said formation, is taken 200-600 m for injecting the displacement agent into one area of the production oil formation and extracting oil from another formation area. The upper part of the tubing string for injecting the displacement agent is located in the vertical wellbore. The lower part of said column is located in the lateral wellbore and packed above the production oil formation. The second tubing string with a deep pumping unit is located in the vertical wellbore. The pumping unit is placed at required height above the production oil formation under condition of bottomhole pressure reduction and oil extraction increase.

EFFECT: improved development efficiency of oil formation area with minimised operating costs for construction and operation of wells.

1 dwg