초록 ▼

An aqueous gel containing a crosslinking agent comprising an organotitanate chelate and a retarding agent which delays crosslinking of the gel. This retarding agent comprises a selected polyhydroxycarboxylic acid having from 3 to 7 carbon atoms. The gel is useful for fracturing and placing propping

An aqueous gel containing a crosslinking agent comprising an organotitanate chelate and a retarding agent which delays crosslinking of the gel. This retarding agent comprises a selected polyhydroxycarboxylic acid having from 3 to 7 carbon atoms. The gel is useful for fracturing and placing propping agents within a subterranean formation. The gel has a high viscosity in the formation and has pumping characteristics in turbulent flow similar to those of water.

대표청구항 ▼

An aqueous gel comprising: an aqueous fluid comprising a water-alcohol solution having from about 0 to 80 percent alcohol by volume; a gelling agent comprising a solvatable polysaccharide having a molecular weight in excess of about 100,000 present in an amount sufficient to gel said aqueous fluid;

An aqueous gel comprising: an aqueous fluid comprising a water-alcohol solution having from about 0 to 80 percent alcohol by volume; a gelling agent comprising a solvatable polysaccharide having a molecular weight in excess of about 100,000 present in an amount sufficient to gel said aqueous fluid; a crosslinking agent soluble in said aqueous fluid comprising an organotitanate chelate present in an amount sufficient to crosslink at least a portion of said gelling agent; and a retarding agent comprising at least one member selected from the group consisting of malic acid, succinic acid, glucuronic acid, gluconic acid, ascorbic acid, alphaketo glutaric acid, and isoascorbic acid present in an amount sufficient to retard the action of said crosslinking agent upon said gelling agent.