METHOD FOR INTENSIFYING OIL PRODUCTION FROM DOMANIC DEPOSITS Russian patent published in 2023 - IPC E21B43/267 E21B43/27 E21B43/22 C09K8/82 C09K8/74 

FIELD: oil industry.

SUBSTANCE: in the method of intensifying oil production from Domanic deposits after perforation of the formation, the thickness of the perforated formation is determined, proppant with a concentration of 15.5-15.9 kg/m³ is pumped with a technical fluid - process water with a volume of 30-35 m³ per 1 m of the thickness of the perforated formation. Next, a liner filled with magnesium granules is lowered into the well opposite the perforation interval, then acid treatment is performed. Surfactant acid composition of “ПАКС” containing, wt.%: 22-25% solution of hydrochloric acid 90; surfactant 2, bottoms of butyl alcohols or isopropyl alcohol 3; water-soluble demulsifier 2; acetic acid of at least 80% concentration 3, in a volume of 1-1.1 m³ per 1 m of thickness of the perforated layer used as an acid composition. “ПАКС” is pressed into the formation with a hydrocarbon solvent with a volume of 0.5 m³ per 1 m of the thickness of the perforated formation, then the liner is raised to the wellhead. Next, proppant with a concentration of 16.7-16.9 kg/m³ is pumped with a technical fluid - technical water with a volume of 41-43 m³ per 1 m of perforated formation thickness. Next, a liner filled with magnesium granules is lowered into the well opposite the perforation interval. Then acid treatment is carried out, “ПАКС” is used as an acid composition in a volume of 1.4-1.7 m³ per 1 m of perforated formation thickness, “ПАКС” is pressed into the formation with a hydrocarbon solvent in a volume of 1 m³ per 1 m of perforated formation thickness. Then a technological holding period of 10-12 hours is carried out.

EFFECT: increase in the production rate of Domanic deposits by changing the molecular-surface properties of the Domanic deposit rock and reservoir fluids, the absence of a rapid drop in reservoir pressure, an increase in the formation coverage of the impact, uniformity of oil reserves production, and an increase in the oil displacement coefficient.

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