Process for treating oil-bearing formation
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United States of America Patent
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Aug 20, 1996
Grant Date -
N/A
app pub date -
Apr 14, 1995
filing date -
Apr 14, 1995
priority date (Note) -
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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 1,000,000, contain about 0.01 to about 5 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.
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