FIELD: chemistry.
SUBSTANCE: present invention discloses modified proppants and methods for production thereof. Modified proppant, which comprises a proppant particle substrate and hydrogel coating, wherein said coating includes a hydrogel-forming polymer, has thickness from 0.01 % to 20 % of average diameter of said substrate, hydrogel-forming polymer swells upon contact with water-based fluid to form a hydrogel coating around proppant particle substrate, after hydration and swelling, said coating has thickness from 10 % to 1,000 % of average particle diameter of proppant particle substrate, said hydrogel-forming polymer is cross-linked with provision of improved properties of polymer for water absorption and swelling. Water-based liquid containing water-based liquid carrier and said proppant. Method of fracturing a geological formation involves pumping into said formation said water-based liquid.
EFFECT: technical result is improvement of propping systems.
17 cl, 10 dwg, 24 tbl, 36 ex
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