METHOD FOR DEVELOPING AN OIL DEPOSIT Russian patent published in 2022 - IPC E21B43/20 

FIELD: oil industry.

SUBSTANCE: invention relates to the oil industry and is intended to activate the production of residual recoverable oil reserves from deposits. The method for developing an oil deposit includes flooding a productive formation through injection wells and extracting oil to the surface through production wells, determining flooded production wells during field development. A site is selected with an increase in the water cut of the produced fluid and a decrease in bottomhole pressure for at least 3 months in production wells. In this area, the influencing injection well is determined. According to previously conducted laboratory studies of the core, the volume of the injected bridging composition is calculated to cover more than the zone of the site with increased water cut in production wells by 30%. A bridging composition is injected into the injection well in a volume of 70-100 m³ per linear meter of a perforated formation at an injection mode of 8-10 m³/hour and an injection pressure of 100-150 atm. After the response, the injection well is put into operation with a decrease in the flow rate of the working agent by at least 10% and an increase in bottomhole pressure by at least 10% from the values ​​before injection.

EFFECT: increased efficiency of oil deposit development and increased oil recovery.

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