METHOD FOR OIL FIELD DEVELOPMENT Russian patent published in 2022 - IPC E21B43/20 

FIELD: mining industry.

SUBSTANCE: invention relates to the mining industry and can be used in the development of natural and man-made oil deposits of minerals with hard-to-recover hydrocarbons. A method for the development of oil fields is proposed, including the opening of a productive reservoir by a system of vertical wells through which an agent displacing oil from the productive reservoir is supplied under pressure in the form of a three-phase mixture consisting of a water-gas emulsion prepared in an electrochemical reactor. At the same time, the feed rate and flow rate of the water-gas emulsion are produced taking into account the thermobaric conditions of the vertical well and the effect of initiating cavitation during inversion modulation of the water-gas emulsion. To accelerate the process of inversion of the water–gas emulsion and activate the cavitation process, periodic supply is carried out through a vertical well into the productive reservoir in the required volume of water-gas emulsion prepared from a solution: from 1 to 10 g of sodium carbonate per liter of water in an electrochemical reactor. Before the implementation of a high-voltage plasma-generating electric discharge that initiates pulsations, and the emission of compression and rarefaction waves that activate the collapse of electrolytic gas bubbles at a sufficient distance from the vertical well, periodic supply of water-gas emulsion to the productive reservoir through a vertical well is carried out in the required volume, followed by weakening of the bonds of heavy oil fractions with mineral particles and the formation of a mobile water-gas-oil intra-reservoir emulsion. At the same time, before switching on the emitting device of the electric discharge generator, the ejector of the water-gas emulsion supply system is removed from the well to a safe distance, a damping device is turned on to concentrate pulsations in the direction of the productive reservoir and reduce the propagation of pulsations through the vertical well to the mouth, and by means of an automatic system, the parameters of the water-gas emulsion supply system, the frequency of switching on and regulation of pulsed electric power are controlled as well as the duration of the energy density, initiated by the emitting device of the electric discharge generator.

EFFECT: increase in the technological and operational efficiency of the hydrocarbon production process by intensifying the process of reservoir permeability, initiating hydraulic fracturing with activation components and the formation of cavitation hydrodynamic effects to increase overall oil recovery.

1 cl, 1 dwg