Oil reservoir permeability profile control with crosslinked wela

Details Oil reservoir permeability profile control with crosslinked wela Oil reservoir permeability profile control with crosslinked wela

1988-12-12

1991-01-01

Morris, Theodore

Compositions: coating or plastic

Coating or plastic compositions

Carbohydrate or derivative containing

523130, 527303, 527305, 536114, C08L 500, C09K 700

Patent

active

049815202

ABSTRACT:
A composition capable of selectively plugging highly permeable zones in a subterranean formation. The composition forms a gel subsequent to its injection into the formation via an injection well. The composition comprises an aqueous solution of a welan gum heteropolysaccharide biopolymer produced by the fermentation of a microorganism of the genus Alcaligenes, a phenolic compound, an aldehyde and water. The compositions of this invention will form stable gels even in low salinity brines. Also provided is a process for selectively plugging regions of higher permeability within an oil-bearing subterranean formation to improve sweep efficiency during a fluid flood oil recovery process using the gel-forming compositions of this invention.

REFERENCES:
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patent: 4716966 (1988-01-01), Shu
patent: 4787451 (1988-11-01), Mitchell
patent: 4793416 (1988-12-01), Mitchell
patent: 4834180 (1988-05-01), Shu
Mobil Docket 4073, Ser. No. 917,324, filed Oct. 9, 1986, which has been allowed.

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