METHOD FOR INFLUENCING THE OIL RESERVOIR Russian patent published in 2023 - IPC E21B43/267 E21B36/04 E21B43/24 

FIELD: oil and gas industry.

SUBSTANCE: in a method for influencing an oil reservoir, which includes heating the reservoir by passing a direct electric current through a multicomponent reservoir mixture with the implementation of an electrical connection between two wells of the same reservoir that have a hydrodynamic connection, using the casing string of one of these wells as the cathode, and the casing string as the anode of the other well; wells are drilled horizontally, placing them one above the other, in laboratory conditions, the concentration of metal particles in the proppant is determined, which ensures an increase in the temperature of the production of the oil reservoir to 60-80°C during the passage of a direct electric current, one of the wells is equipped with a downhole pump, reducing the pressure inside the well, a directed single-stage and/or multi-stage hydraulic fracturing of the hydraulic fracturing formation is carried out through the other well, creating a hydrodynamic connection between the wells, and proppant with metal particles is pumped. The proppant with metal particles is forced out of the cracks into the reservoir interval by the fracturing fluid, the process holding is carried out to ensure uniform distribution of the proppant with metal particles in the reservoir interval and equalization of the reservoir pressure in this reservoir interval. Well casing strings are connected respectively to the poles of a direct current source with the following initial parameters of 190-220 V and a current density of 0.5-1.5 A/m², the formation is heated. From a well equipped with a downhole pump, products are taken by controlling their temperature. At a reservoir production temperature of 60°C gradually increase the voltage and current density, and at a temperature of 80°C - gradually reduce the voltage and current density in the range of voltage values of 150-450 V and current density of 0.1-10 A/m².

EFFECT: improvement of reservoir properties of oil-saturated formations, cleaning of bottom hole areas from mineral clots and deposits of asphalt-tar and paraffin deposits.

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