METHOD OF DEVELOPING CARBONATE RESERVOIR Russian patent published in 2024 - IPC E21B43/27 E21B43/22 C09K8/74 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry. In the method of development of carbonate reservoir section of deposit with injection well and with at least one reacting production well is selected, thickness of perforated formation is determined, injection well is stopped. Further in responsive production well acid composition is injected containing the following, wt.%: 15% aqueous solution of hydrochloric acid 55; acetic acid 10; diethylene glycol 15; cationic surfactant – corrosion inhibitor “КИ-1 10”; process water 10, in amount of 17 m³ per 1 m of the perforated formation. Process exposure is performed for 8-10 hours. Further, a foaming agent and nitrogen are injected into a reacting production well, wherein volume of foaming agent makes 19 m³ per 1 m of thickness of perforated formation, while volume of liquid nitrogen makes 26 m³ per 1 m of thickness of perforated formation. Foaming agent and nitrogen are blown through with formation water in amount of 10 m³ per 1 m of thickness of the perforated formation. Then process exposure is carried out for 4-5 hours, after which the reacting production and injection wells are started.

EFFECT: increasing oil displacement coefficient due to complex action on the formation.

1 cl, 1 ex