POLYMER-DISPERSED COMPOSITION FOR INCREASING COVERAGE OF NON-UNIFORM OIL FORMATION BY FLOODING Russian patent published in 2024 - IPC C09K8/508 E21B33/138 

FIELD: oil industry.

SUBSTANCE: invention relates to oil industry, namely to control of filtration characteristics of oil formations. Polymer-dispersed water-shutoff composition for increasing the coverage of a non-uniform oil formation by flooding contains, wt.%: polyacrylamide 0.01–5; micro-reinforcing additive 0.01–5.5; water is the rest. As a micro-reinforcing additive, the composition contains a waste of an aluminium-chromium catalyst during wet scrubbing of gases of dehydrogenation of hydrocarbon material for obtaining monomers in production of synthetic rubber — catalyst sludge with content of 69–73% of aluminium oxide, 10–14% of chromium III oxide. Weight ratio of polyacrylamide and said slurry in the composition ranges from 1:1 to 1:2, respectively.

EFFECT: increased coverage of non-uniform oil formation by waterflooding due to inclusion into development of low-permeable oil-saturated zones not covered by drainage.

1 cl, 2 tbl