CHEMICAL-ENGINEERING COMPOSITION WITH ADJUSTABLE VISCOSITY FOR LEVELING THE PROFILE LOG IN MAINTAIN RESERVOIR PRESSURE WELLS AND CREATING VISCOELASTIC SCREENS IN THE RESERVOIR Russian patent published in 2023 - IPC E21B43/22 C09K8/00 

FIELD: oil production.

SUBSTANCE: chemical-engineering composition with adjustable viscosity for leveling the profile log in maintain reservoir pressure wells and creating viscoelastic screens in the reservoir. As a viscous agent, a reverse finely dispersed hydrocarbon microemulsion is used with droplet sizes - water globules of 0.1-3 μm, stable when heated to 80°-120°C, prepared from the initial hydrocarbon liquids - NGL, diesel fuel, oils of various densities, the amount of content of paraffin-resinous components, the emulsifier of the polymeric type REM 100 and bottom - surface water, in the ratio of components: bottom water 60%-80%, hydrocarbon liquid - 38%-19%, emulsifier - 5%-1%. By successive loading of HC liquid, emulsifier, bottom water and intensive mixing, fine droplets are created in the hydrocarbon substance - water globules, which are smaller in comparison with the sizes of the interporting channels. The inverse finely dispersed hydrocarbon microemulsion is capable of maintaining viscoelastic properties for a long time and resisting destruction during filtration through porous reservoirs.

EFFECT: increase in oil recovery due to the organization of mobile, long-term viscoelastic screens in the reservoir.

1 cl, 4 tbl