METHOD OF SIMULTANEOUS-SEPARATE OPERATION OF INJECTION WELL Russian patent published in 2022 - IPC E21B43/14 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry and can be used in simultaneous separate operation of several well intervals differing by their filtration-capacitive properties. Method includes lowering into the well on the pipe string packers separating the fluid injection intervals, and the injection distribution devices located opposite the fluid injection intervals, geophysical and/or hydrodynamic researches and comparison of actual flow rates of liquid with preset values. Before lowering, geophysical and/or hydrodynamic researches are carried out to determine filtration-capacitive properties of injection intervals and comparison of actual flow rates of liquid with specified values is carried out on the basis of researches and statistical analysis of operation of injection wells operating in similar conditions, injection distribution devices are made in the form of branch pipes, the flow section of which is made of the related diameter to reduce hydrodynamic losses, with holes in their walls of the required diameter and/or quantity, which provide, based on hydrodynamic calculations and/or empirically, the required volume and pressure of pumping into the corresponding pumping interval.

EFFECT: proposed method enables to achieve effective distribution of the pumped liquid over pumping intervals separated by packers with a small number of simple technological operations, due to preliminary determination of filtration-capacitance properties of these intervals and provision of pipes with branch pipes with required hydrodynamic resistances for corresponding injection intervals before lowering of the pipe string.

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