METHOD OF INCREASING OIL RECOVERY OF FRACTURED, WELL PERMEABLE, AVERAGE-PERMEABLE POROUS BEDS AND BEDS WITH ARTIFICIALLY CREATED CRACKS AFTER HYDRAULIC FRACTURING-FHF Russian patent published in 2016 - IPC E21B43/22 C09K8/588 

FIELD: oil and gas industry.

SUBSTANCE: disclosed is a method of increasing oil recovery of fractured, well-penetrable, medium-penetrable porous beds and beds with artificially created cracks after hydraulic fracturing of the bed involving pumping of water solution, suspended in which is a mixture of modified bentonite clay powder - MBCP with an additive and partially hydrolyzed polyacrylamide - PHPAA, while suspended in the water solution is a mixture containing as an additive quartz sand at a ratio of MBCP to quartz sand from 10:1 to 4:1 with the amount of 5-10 MP, 1-10 MP of dry sodium silicate, 0.01-0.30 MP of PHPAA and 0.1-0.60 MP of a fixing agent-technical calcium chloride.

EFFECT: higher efficiency of processing, pumping of a bigger amount of the composition into a more remote formation zone.

1 cl, 2 tbl