METHOD FOR DEVELOPMENT OF OIL DEPOSIT SECTION Russian patent published in 2024 - IPC E21B43/16 E21B43/30 

FIELD: oil industry.

SUBSTANCE: method for development of an oil deposit section includes drilling of vertical production and injection wells, pumping of working agent into injection wells and extraction of products from production wells, determination of flooded interlayers of deposit and influencing injection well, which is the reason for watering. After flooding, offshoots are drilled from production wells with their arrangement in the opposite direction relative to the injection well. At that, offshoots in production wells are drilled in the opposite direction relative to the injection well with curvature radius of 75–80 m and at distance of 25–30 m from the main shafts, and the offshoots are perforated in the oil-saturated formation. Reservoir pressure of productive formations is measured, when reservoir pressure is reduced by 75% of initial reservoir pressure, pumping of working agent is started into injection well with volume of 1.2 of produced product volume with pressure 20% higher than formation pressure and injection cycle of 6 days and 1 day of downtime.

EFFECT: higher efficiency of oil reserve recovery, oil recovery factor and sweep efficiency.

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