METHOD OF OPERATIVE CONTROL OF WATER FLOODING OF FORMATIONS Russian patent published in 2020 - IPC E21B47/10 E21B43/20 G06F30/20 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry, namely, to control of water flooding of oil formations. Method includes extraction of oil through production wells and pumping of working agent through injection wells, wherein for determination of optimum pickups of injection wells and production rate of production well fluids, mathematical model of deposit is used, in which, as initial data for each production well and injection wells potentially influencing it, metrics are taken in form of a measurement date, intake capacity, fluid flow rate and oil fraction in the production, pressure at the bottom of injection and production wells, dynamic level of liquid in annular space of production well. Mathematical model used is combined with artificial neural network volumetric-resistive method of CRM (Capacitance-Resistive Models), which enables to obtain dependence of liquid flow rate, bottomhole pressure, dynamic level and oil production wells fraction from injection wells intake capacity current value, wherein mathematical model is adapted by obtaining minimum discrepancy between actual and design data of fluid flow rate, oil ratio, bottomhole pressure and dynamic level of each operating production well, using the neural network values of hydrodynamic resistance coefficients between wells in the CRM model are determined, recovering field of oil saturation of formation and obtaining functional dependence of daily production of liquid and oil of production well depending on intake capacity of injection wells surrounding it and production of liquid of surrounding production wells, then, total oil production is maximized in the field as a whole by reallocation of intake capacity of injection wells and control fluid recovery of production wells with imposing restrictions on injection volumes for efficient arrangement of oil displacement system with water and maintaining formation pressure.

EFFECT: technical result consists in provision of efficient organization of oil displacement system with water and formation pressure maintenance system.

1 cl, 5 dwg, 2 tbl