FIELD: chemistry.
SUBSTANCE: invention relates to packing relatively unpacked parts in an underground formation and reducing outflow of proppant from cracks in a well. The plurality of proppant particles coated with a delayed action tackifying composition which contains an aqueous tackifying agent and a delayed acid release activator capable of activating the aqueous tackifying agent, wherein the delayed acid release activator contains at least one material selected from a group comprising: orthoacetate; trimethyl orthoacetate; triethyl orthoacetate; tripropyl orthoacetate; triisopropyl orthoacetate; tributyl orthoacetate; poly(orthoacetates); orthoformate; trimethyl orthoformate, triethyl orthoformate; tripropyl orthoformate; triisopropyl orthoformate; tributylorthoformate; poly(orthoformate); orthopropionate; trimethyl orthopropionate; triethyl orthopropionate; tripropyl orthopropionate; triisopropyl orthopropionate; tributyl orthopropionate; poly(orthopropionate); and orthoether of a polyfunctional alcohol. The near-wellbore processing composition for use in an underground formation with control of particle migration contains a water-based liquid and said plurality of particles. The invention is developed in subclaims.
EFFECT: improved flexibility and degree of controlling packing.
12 cl, 1 ex
