METHOD OF HYDRODYNAMIC STIMULATION OF THE FORMATION TO INCREASE OIL RECOVERY Russian patent published in 2023 - IPC E21B43/16 

FIELD: oil industry.

SUBSTANCE: invention relates to a method for hydrodynamic stimulation of a formation to increase oil recovery. The method of hydrodynamic stimulation for increasing oil recovery from formations includes the selection of water and liquid hydrocarbons through production wells and the injection of a working agent through injection wells. Field data on the operation of each well are registered. Based on field data on well operation, machine learning methods reproduce measurements of water and hydrocarbon production. In the process of multivariate calculations, the modes of injection of the displacing fluid and the modes of operation of producing wells are selected, which provide the highest cumulative production of hydrocarbons. The modes are laid in a three-dimensional hydrodynamic simulator that combines neural networks and a geological and hydrodynamic model, which allows you to generate the values of injectability and fluid flow rates and issue commands for controlling wells in manual or automatic mode. The influence of injection of a water-gas mixture into the reservoir is measured with the determination of the volumes and ratios of water and gas in the mixture, as well as wells that are hydrodynamically interconnected. The injection of the working agent into injection wells is carried out with the control of bottom hole pressures in production wells. When the bottom hole pressure in the production well decreases, the injection wells hydrodynamically connected with this production well are injected with a water-gas mixture for 4–5 days per month until the bottom hole pressure is restored, after which the injection of the water-gas mixture is stopped until the bottom hole pressure in one of the production wells decreases.

EFFECT: expanding the functionality of the hydrodynamic impact on the reservoir through the use in reservoirs with different structure and reservoir pressure, as well as to increase the effectiveness of the impact on the reservoir.

2 cl, 4 dwg