PRODUCING LAYER FILTRATION PROPERTY MODIFIER Russian patent published in 2014 - IPC C09K8/42 

FIELD: chemistry.

SUBSTANCE: invention relates to the oil industry and specifically to compositions for stabilising reservoir properties of a producing layer. The producing layer filtration property modifier contains potassium chloride or sodium chloride, scale inhibitors - dry mixture of nitrilotrimethylphosphonic acid and oxyethylidene diphosphonic acid; a water repellent which contains alkylated tertiary amines or salts thereof as the active substance, with the following ratio of components, wt %: potassium chloride or sodium chloride - 50, oxyethylidene diphosphonic acid 20, nitrilotrimethylphosphonic acid - 5, water repellent - 25. The invention is developed in subclaims.

EFFECT: modification of filtration and reservoir properties of a producing layer by reducing relative permeability for water and increasing relative permeability for oil without reducing the absolute relative permeability of the processed rock of the producing layer, which enables to change the sweep efficiency and flooding ratio of the layer and increases the oil recovery factor.

3 cl, 6 ex