METHOD OF PRODUCING AND FEEDING HIGH-QUALITY FLUID FOR FORMATION HYDRAULIC FRACTURING Russian patent published in 2020 - IPC C09K8/594 C09K8/80 C09K8/84 E21B43/267 

FIELD: physics.

SUBSTANCE: invention relates to production of hydraulic fracturing fluid used in hydraulic fracturing of underground reservoir. Method of producing high-quality fluid for hydraulic fracturing of a formation, comprising providing a first stream containing liquid CO₂, formation of a second stream containing water and other additives, and increasing pressure to pressure required for hydraulic fracturing operation, introduction of propping agent only in first stream containing liquid CO₂, at concentration of up to 20 lb/gal (2.4 kg/dm³) and increasing pressure to pressure required for hydraulic fracturing operation, mixing first and second flows under pressure, including proppant from first said stage, forming high-quality fluid for hydraulic fracturing of formation, having a Mitchell-characteristic of at least 50 % and a suspension characteristic of less than 95 %, where the first and second streams are provided at a constant predetermined volume flow ratio to maintain a constant characteristic of the suspension in the formed fracturing fluid, and concentration of proppant in formation hydraulic fracturing fluid is independently varied by rate of adding proppant filler into first flow at step. Invention is developed in dependent items of the formula.

EFFECT: technical result is providing use of high concentration of proppant in process of hydraulic fracturing and reducing water load.

9 cl, 1 dwg, 4 tbl, 3 ex