METHOD FOR INTENSIFYING OIL PRODUCTION FROM A RESERVOIR Russian patent published in 2022 - IPC E21B43/267 C09K8/80 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil and gas industry, and in particular to methods for increasing oil recovery by changing the porosity and permeability properties (PPP) of the formation in the interwell space using stimulating components and hydraulic fracturing (HF). A method for intensifying oil production from a reservoir is proposed, including the construction of production and injection wells according to a given scheme into a productive reservoir, injection of a displacing agent into injection wells to maintain reservoir pressure and withdrawal of reservoir production from production wells, sequential injection through a selected well to increase reservoir properties bottom-hole and interwell zones of the formation of sodium-containing elements and a reaction agent with sodium-containing elements with displacement into the formation with the release of chemical reaction products. At the same time, before injection, hydraulic fracturing is performed to obtain fractures, into which sodium-containing elements are pumped, consisting of proppant and 10–35% metallic sodium enclosed in an acid-soluble protective shell. The protective shell has a different thickness to increase the reaction time, and an aqueous acid solution is used as a reaction agent in volumes and concentration sufficient to dissolve the protective shell, the reaction products are hydrogen, which is released with heat during the reaction of metallic sodium with water in the reservoir.

EFFECT: expansion of the scope by increasing the coverage with the help of hydraulic fracturing of the impact on the bottomhole and interwell zones of the formation.

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