Compositions useful for treating oil-bearing formation

Details Compositions useful for treating oil-bearing formation Compositions useful for treating oil-bearing formation

1996-08-19

1998-08-04

Kelly, C. H.

Earth boring, well treating, and oil field chemistry

Well treating

Contains organic component

507209, 507219, 507225, 507260, 507267, 507903, 507215, 166295, E21B 4326, C09K 300

Patent

active

057893519

ABSTRACT:
A process for altering the permeability of a subterranean formation comprises injecting into the subterranean formation a gelling composition which comprises a carboxylate-containing polymer, a crosslinking agent, and a liquid such as a produced brine wherein the polymer forms a gel in the formation, in the presence of the crosslinking agent. The polymer can have a molecular weight of from about 10,000 to about 30,000,000, contain about 0.01 to about 10 mole % of a carboxylate group, and be present in the gelling composition in the range of from about 100 to about 100,000 mg per liter of the composition.

REFERENCES:
patent: 4524829 (1985-06-01), Hanlon et al.
patent: 5478802 (1995-12-01), Ahmed Moradi et al.
patent: 5547025 (1996-08-01), Ahmed et al.

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