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Title: Enzymatic method for improving the injectability of polysaccharides

Abstract

A method for enhancing the ability of polysaccharides in aqueous solution to flow through a porous medium comprises contacting the polysaccharides with an endoenzyme capable of hydrolyzing at least one of the linkages of the sugar units of the polysaccharides and maintaining the polysaccharides in contact with the enzyme under hydrolysis conditions for a time sufficient to decrease the tendency of the polysaccharides to plug the porous medium yet insufficient to decrease the viscosity of the aqueous polysaccharides by more than 25%. The partially hydrolyzed polysaccharides are useful as thickening agents for flooding water used to recover oil from oil-containing subterranean formations.

Inventors:
; ;
Publication Date:
OSTI Identifier:
5173273
Patent Number(s):
US 4326037
Assignee:
Department Of Energy
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 1 Nov 1979; Other Information: PAT-APPL-090176
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; OIL WELLS; MICROEMULSION FLOODING; AQUEOUS SOLUTIONS; ENHANCED RECOVERY; ENZYMES; FLUID FLOW; GLUCOSE; HYDROLYSIS; INJECTION; POLYSACCHARIDES; POROUS MATERIALS; VISCOSITY; WELL STIMULATION; ALDEHYDES; CARBOHYDRATES; CHEMICAL REACTIONS; DECOMPOSITION; DISPERSIONS; FLUID INJECTION; HEXOSES; INTAKE; LYSIS; MATERIALS; MISCIBLE-PHASE DISPLACEMENT; MIXTURES; MONOSACCHARIDES; ORGANIC COMPOUNDS; RECOVERY; SACCHARIDES; SOLUTIONS; SOLVOLYSIS; STIMULATION; WELLS; 020300* - Petroleum- Drilling & Production

Citation Formats

Compere, A L, Griffith, W L, and Holleman, J W. Enzymatic method for improving the injectability of polysaccharides. United States: N. p., 1982. Web.
Compere, A L, Griffith, W L, & Holleman, J W. Enzymatic method for improving the injectability of polysaccharides. United States.
Compere, A L, Griffith, W L, and Holleman, J W. Tue . "Enzymatic method for improving the injectability of polysaccharides". United States.
@article{osti_5173273,
title = {Enzymatic method for improving the injectability of polysaccharides},
author = {Compere, A L and Griffith, W L and Holleman, J W},
abstractNote = {A method for enhancing the ability of polysaccharides in aqueous solution to flow through a porous medium comprises contacting the polysaccharides with an endoenzyme capable of hydrolyzing at least one of the linkages of the sugar units of the polysaccharides and maintaining the polysaccharides in contact with the enzyme under hydrolysis conditions for a time sufficient to decrease the tendency of the polysaccharides to plug the porous medium yet insufficient to decrease the viscosity of the aqueous polysaccharides by more than 25%. The partially hydrolyzed polysaccharides are useful as thickening agents for flooding water used to recover oil from oil-containing subterranean formations.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1982},
month = {4}
}