METHOD FOR DEVELOPMENT OF SECTION OF MULTILAYER OIL DEPOSIT Russian patent published in 2024 - IPC E21B43/14 E21B43/20 

FIELD: oil, gas and coke-chemical industry.

SUBSTANCE: invention relates to oil industry, in particular to methods for development of waterlogged areas of oil deposit. Method of developing a section of a multi-formation oil deposit includes drilling vertical and inclined wells, determining interlayers with different permeability, which are not hydrodynamically connected, pumping of displacement fluid through injection well and oil production through production wells. A vertical injection well is drilled in the central part of the deposit section and inclined production wells are drilled along the perimeter inside the deposit section. Then interlayer with high permeability is developed in natural mode until formation pressure is reduced by 15%, after which it is transferred from natural development mode to waterflooding mode using produced water as displacement fluid in the mode of maintaining current formation pressure and volume of formation water injection equal to 1.2 of volume of produced product from surrounding inclined production wells. Interlayer with low permeability is developed in the mode of maintaining formation pressure to water cut of the produced product from 70%, after which the produced water is used as a displacement fluid with reduction of its injection volume by 18%.

EFFECT: higher oil recovery of deposit.

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