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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:
 [1];  [2];  [1]
  1. Oak Ridge, TN
  2. Knoxville, TN
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
864183
Patent Number(s):
US 4326037
Assignee:
United States of America as represented by United States (Washington, DC)
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
enzymatic; method; improving; injectability; polysaccharides; enhancing; ability; aqueous; solution; flow; porous; medium; comprises; contacting; endoenzyme; capable; hydrolyzing; linkages; sugar; units; maintaining; contact; enzyme; hydrolysis; conditions; time; sufficient; decrease; tendency; plug; insufficient; viscosity; 25; partially; hydrolyzed; useful; thickening; agents; flooding; water; recover; oil; oil-containing; subterranean; formations; partially hydrolyzed; porous medium; subterranean formation; comprises contacting; time sufficient; aqueous solution; medium comprises; subterranean formations; recover oil; enzymatic method; /435/166/

Citation Formats

Griffith, William L, Compere, Alicia L, and Holleman, James W. Enzymatic method for improving the injectability of polysaccharides. United States: N. p., 1982. Web.
Griffith, William L, Compere, Alicia L, & Holleman, James W. Enzymatic method for improving the injectability of polysaccharides. United States.
Griffith, William L, Compere, Alicia L, and Holleman, James W. Fri . "Enzymatic method for improving the injectability of polysaccharides". United States. https://www.osti.gov/servlets/purl/864183.
@article{osti_864183,
title = {Enzymatic method for improving the injectability of polysaccharides},
author = {Griffith, William L and Compere, Alicia L and Holleman, James 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 = {1}
}

Patent:

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