METHOD OF IMPROVING PLUGGING WITH FIBRES Russian patent published in 2017 - IPC C09K8/42 C09K8/50 E21B33/138 C09K8/58 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of blocking flow of oil-water fluid medium with ratio of water: oil equal to 70:30, through at least one passage into an underground formation, through which passes a borehole, comprising: (i) selection of compositions, concentration and size of hard fibres, flexible fibres and solid backfilling particles; (ii) preparation of oil-water fluid medium, to which fibres and particles are added; and (iii) injection of blocking oil-water fluid medium into passage, wherein fibres form a grid across passage, and solid particles pack grid blocking flow, wherein hard fibres have diameter from 20 to 60 mcm and length from 2 mm to 12 mm, wherein flexible fibres have diameter from 8 mcm to 19 mcm and length from 2 mm to 12 mm. Invention also relates to intensification of underground formation. Invention is developed in subclaims.

EFFECT: technical result is providing redirection of fluid medium for intensification of well, which allows fluid medium to avoid areas with high permeability in rock formation and treat areas with lower permeability with improvement of results intensification.

14 cl, 3 dwg, 3 tbl, 3 ex