METHOD OF INCREASING OIL RECOVERY OF FORMATIONS Russian patent published in 2020 - IPC C09K8/506 E21B33/138 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry, in particular to a method for increasing oil recovery of formations, and can be used in development of oil deposits. Proposed method comprises pumping 10-30 wt% water suspension of the following composition into oil reservoir, wt%: titanium coagulant obtained from titanium-containing leucoxene ore, 10-30; aluminum hydroxochloride 10-20; carbamide 30-40; urotropin 10-30. To increase coverage waterflood reservoir through an injection well a slurry in amount of 5-50 m³ per 1 m of the perforated formation thickness. To limit gas-water supply into the wellbore a slurry in amount of 1-30 m³ per 1 m of the perforated formation thickness.

EFFECT: formation of strong gel inside formation with temperature of 20-60°C, improved rheological properties of the gel, increased coverage of the formation by water flooding by 10-25%, increased oil recovery of the formation.

3 cl, 3 tbl, 1 ex