METHOD OF HIGHLY POROUS LAYER AREAS SELECITVE ISOLATION Russian patent published in 2009 - IPC E21B33/138 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry, particularly to selective isolation of highly porous washed by water layers areas in producing well with absence of accurate data about location of mentioned layers areas in heterogeneous oil field collectors. Method of selective isolation of highly porous layer areas includes pump in into well of aquaseal, with following driving, technological isolation and development of well. Into producing well for temporal isolation of low-penetrable areas it is pumped in aquaseal on the basis of sodium silicate with 1.0-2.8% wt of acid gel formation agent, in amount 0.05-2 m³ per 1 metre of net productive formation thickness, then for insulation of highly porous areas of layer it is pumped in aquaseal, containing sodium silicate (liquid glass) and acid gel formation agent, in amount 2-10 m³ per 1 metre of capacity of highly porous layer areas. Pump in is implemented by equal edging with reduction of gel formation time and increasing of acid gel formation agent content in each following edging.

EFFECT: effectiveness increase of selective isolation of highly porous layers.

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