MULTIZONE OIL DEPOSIT DEVELOPMENT METHOD Russian patent published in 2017 - IPC E21B43/20 E21B43/14 

FIELD: oil and gas industry.

SUBSTANCE: multizone oil deposit development method involves drilling of vertical and inclined wells as per any of the known well patterns; determination of interlayers with various permeability; pumping of displacing fluid to each interlayer through injection wells and extraction of the field product from each of the interlayer through producing wells. Multizone reservoir areas are determined where formational pressure of each interlayer eliminates hydrodynamic connection between them when transmitting. Drilling of vertical producing wells in the central portion of the deposit and of injection wells around the perimeter inside the deposit is performed. Producing wells are built vertically and injection wells-inclined so that the profile log is uniform at all interlayers from pressure well to nearby producing wells.

EFFECT: ensuring alignment of the displacement fronts in the deposit sections, consisting of interlayers of different permeability, increasing the completeness of the reserves production and limiting the produced water volumes, which leads to a higher oil recovery factor (ORF) of the entire deposit.

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