DIRECT CHANNELING METHOD AND SYSTEM FOR INCREASING FRACTURE CONDUCTIVITY Russian patent published in 2017 - IPC E21B43/267 C09K8/80 C09K8/92 

FIELD: mining engineering.

SUBSTANCE: method for processing an underground formation with a well passed therethrough, and in which the stage composition is pumped for treatment with pressure higher the fracture pressure to generate the fracture in the formation, at that the fluid contains constant concentration of first solid particles and non-constant concentration of anchor material, the first solid particles distributed in the fracture are combined to form spaced-apart clusters in the fracture in order to slow the combination of at least some of the clusters, and the pressure in the fracture is reduced to keep the fracture open on the clusters in order to form hydraulically conducting channels interconnected between the clusters. The method for processing the underground formation with a well passed therethrough, the first solid particles are pumped into the formation at a constant concentration in the formation, at the same time maintaining constant rate and concentration of the first solid particles during the pumping stage of the composition for treatment, there is gradual alternation of the concentration of the anchor material in the composition stage for treatment between a plurality of levels relatively enriched with the anchor material and a plurality of levels depleted by the anchor material in the pumped stage of the composition for treatment. The method for processing the underground formation with a well passed therethrough the treatment composition is pumped into the formation at a constant rate, comprising a thickened carrier with constant concentration of the first solid particles to form a uniform area in the fracture with a constant uniform distribution of the first solid particles, successive alternation of concentration levels of the anchor material in the composition for treatment between the levels enriched with the anchor material, and the levels depleted by the anchor material, in the pumped stage of the composition for treatment in order to form non-uniform areas containing sections enriched with the anchor material and sections depleted by the anchor material in a homogeneous area with a constant uniform distribution of the first solid particles, lowering the viscosity of the carrier in a uniform area to initiate precipitation of the first solid particles prior to fracture closing, in order to form hydraulically conducting channels at least in sections depleted by the anchor material and columns in sections enriched in anchor material; and then provide closing of fracture on columns. Variants of systems for treatment the underground formation with a well passed therethrough according to said methods. The invention is developed in the dependent claims.

EFFECT: increased treatment efficiency.

29 cl, 1 ex, 13 dwg