METHOD FOR DEVELOPMENT OF OIL FIELD WITH HETEROGENEOUS RESERVOIRS Russian patent published in 2024 - IPC E21B43/20 E21B43/26 

FIELD: mining.

SUBSTANCE: invention relates to a method of developing an oil deposit with heterogeneous reservoirs. Method includes drilling of production and injection wells. It also includes pumping of displacement agent through injection wells. Method also involves extraction of products through production wells, determination of boundaries of non-reservoir rocks zones and extraction of formation products from stagnant zones near the zone of non-reservoir rocks. Method involves determination of the degree of product watering. At watering of production wells up to 98%, a side horizontal shaft is drilled from production wells towards the zone of non-reservoir rocks and transferred to injection with injection volume of 1.4 of the volume of produced fluid from production wells and pressure 10% higher than initial formation pressure. Also, sections of fracture of zones of non-reservoir rocks are determined. After that in sections of fracture of zones of non-reservoir rocks additional horizontal production well is drilled parallel to regional stress opposite to injection wells with side horizontal borehole.

EFFECT: increasing oil recovery of the deposit and introducing additional oil reserves into development, which are located in fracture zones of zones of non-reservoir rocks.

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