Aqueous gellable composition, useful for modifying the permeabil

Details Aqueous gellable composition, useful for modifying the permeabil Aqueous gellable composition, useful for modifying the permeabil

1992-03-19

1993-06-15

Geist, Gary L.

Compositions

Leather or fur treating

523130, 166295, 525360, E21B 4325

Patent

active

052194752

ABSTRACT:
An aqueous gellable composition having a delayed gelling time is disclosed, which contains a water-soluble polymer crosslinkable with Cr.sup.3+ and a crosslinking/retardant system containing a Cr.sup.3+ ion and a salicylic acid ligand, wherein said ligand can be in free form, or in the form of a complex with Cr.sup.3+, or partially in free form and partially in complexed form.
Such a composition is useful for modifying the permeability in petroleum reservoirs, within a wide range of temperatures, of from about 60.degree. C. to 120.degree. C., or higher temperatures.

REFERENCES:
patent: 3267083 (1966-08-01), Imhof
patent: 3536137 (1970-10-01), Walther
patent: 3867354 (1975-02-01), Betts et al.
patent: 3950313 (1976-04-01), Bain et al.
patent: 4373070 (1983-02-01), Soula

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