Viscosifying modified proppant system for carbon dioxide based fracturing fluids

摘要

Viscosifying proppants including proppant particles coated with a CO₂-philic coating in which the CO₂-philic coating has a solvable portion that viscosifies a CO₂-based fluid when the viscosifying proppant is added to the CO₂-based fluid are provided. Methods of making viscosifying proppants are also provided that include coating proppant particles with a precursor material of a CO₂-philic material, and polymerizing the precursor material to form a viscosifying proppant. Viscous hydraulic fracturing fluids include a CO₂-based fluid and the viscosifying proppants and methods of treating subterranean formations that include contacting a subterranean formation with a viscous hydraulic fracturing fluid and propagating at least one subterranean fracture are also provided.