METHOD FOR DEVELOPMENT OF FLOODED OIL RESERVOIR WITH NON-UNIFORM PERMEABILITY Russian patent published in 2020 - IPC E21B43/22 C09K8/90 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to development of oil deposits and can be used in development of oil deposit with non-uniform permeability flooded formations. In the method for development of a flooded oil formation with non-uniform permeability, involving pumping into the formation of a gel-forming composition containing polyacrylamide, chromium acetate and magnesium oxide in water, gel-forming composition additionally contains guar polysaccharide and wood flour with particle size not exceeding 1.2 mm, and its pumping is carried out in the form of an aqueous dispersion, with the following ratio of components, wt%: polyacrylamide 0.5–1.0, guar 0.1–0.2, chromium acetate 0.04–0.06, magnesium oxide 0.02–0.05, wood flour – 0.02–0.2, water – balance.

EFFECT: increased efficiency of development of flooded formation with non-uniform permeability by increase of shear strength of composition.

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