METHOD OF HYDRAULIC FRACTURING USING LOW-VISCOSITY FLUID CONTAINING PROPPANT AGGREGATES BASED ON POLYELECTROLYTE COMPLEX Russian patent published in 2024 - IPC E21B43/26 

FIELD: mining.

SUBSTANCE: invention relates to production of hydrocarbons, and in particular to a method of hydraulic fracturing using a low-viscosity fluid containing proppant aggregates based on a polyelectrolyte complex. Hydraulic fracturing method involves pumping through the well into the formation of a fluid for creation and propagation of a hydraulic fracturing fracture, preparation of the hydraulic fracturing fluid by mixing at least water, a proppant and at least a first polymer additive and a second polymer additive to obtain flocculated proppant particles, injection of a fracturing fluid with the obtained flocculated proppant particles into the formation. Then displacement fluid is pumped into the formation. First polymer additive and the second polymer additive are formed from polyelectrolytes with opposite charges.

EFFECT: providing placement of proppant in fracture at a distance from well shaft in sufficient concentrations and high value of vertical placement of proppant in complex system of fractures.

10 cl, 15 dwg