Fracturing of subterranean formations

Details Fracturing of subterranean formations Fracturing of subterranean formations

1984-10-20

1987-07-28

Lechert, Jr., Stephen J.

Compositions

Leather or fur treating

166283, 1663051, 166308, 556 51, 556 54, C09K 300, E21B 4326, E21B 4316

Patent

active

046830685

ABSTRACT:
Novel aqueous crosslinked gels are described herein which are useful for fracturing subterranean formations. The novel gels are comprised of a solvatable polysaccharide and a soluble zirconium crosslinking agent. The zirconium crosslinking agents are novel and are prepared by reacting a zirconium alkoxide with certain alkanolamines under anhydrous conditions. The zirconium compounds are activated by contact with water. As an example, a zirconium crosslinker was prepared by reacting zirconium tetra(n-propoxide) with triethanolamine in an n-propanol solvent under anhydrous conditions. The zirconium compound thus prepared was activated with water and used to form a stable aqueous crosslinked gel by blending the aqueous crosslinker into an aqueous hydroxypropylguar solution.

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