Interpolymers useful for treating subterranean formations.

摘要

Crosslinkable interpolymers are made by polymerising 94 to 99 mole % of a water-soluble monomer, 0.5 to 5 mole % of a hydrophobe monomer, and 0.5 to 1 mole % of a vicinal diol monomer. They viscosify aqueous liquids, and the viscosity may be enhanced by the addition of a surfactant having an HLB value of about 10 or less. The interpolymers are readily crosslinkable with polyvalent metal ions, such as titanium and zirconium to form thermally stable viscoelastic gels. The gels provide viscosity and solids transport characteristics that are useful in stimulating, gravel packing and polymer flooding operations in treating subterranean formations.