HYDRAULIC FRACTURING COMPOSITION Russian patent published in 2020 - IPC C09K8/90 C09K8/88 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry, in particular, to compositions for hydraulic fracturing of formation - HF. Composition for hydraulic fracturing of formation, which includes low-viscosity carrier liquid, dispersed in low-viscosity liquid proppant and fiber dispersed in low-viscosity carrying liquid - polylactic acid, low-viscosity carrying liquid contains an aqueous solution of a mixture of xanthan and a water-swellable polymer - a copolymer of acrylamide with potassium acrylate with a cation exchange capacity of 4.6 meq/g. Content of components is as follows, wt%: xanthan 0.2-0.6, with acrylamide with potassium acrylate 0.001-0.2, fresh water - rest. Proppant composition contains aluminosilicate proppant, polylactic acid - polylactic acid with fiber density of 100-300 g/dm³ and fiber length of 3-6 mm. Weight ratio of aqueous solution of mixture of xanthan and copolymer of acrylamide with potassium acrylate, polylactic acid and aluminosilicate proppant is 1:(0.001-0.006):(0.05-0.8).

EFFECT: high efficiency of action of composition by increasing retention capacity due to components of composition, providing creation of structured polymer system, as well as by increasing permeability recovery coefficient.

1 cl, 2 tbl