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Title: Enzymatic method for improving the injectability of polysaccharides. [US Patent Application]

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:
; ;
OSTI Identifier:
5118416
Assignee:
Dept. of Energy TIC; ERA-05-037597; EDB-80-115598
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 59 BASIC BIOLOGICAL SCIENCES; OIL WELLS; ENHANCED RECOVERY; POLYSACCHARIDES; ENZYMATIC HYDROLYSIS; FLUID FLOW; HYDROLASES; OPTIMIZATION; POROUS MATERIALS; VISCOSITY; WATERFLOODING; CARBOHYDRATES; CHEMICAL REACTIONS; DECOMPOSITION; ENZYMES; FLUID INJECTION; HYDROLYSIS; LYSIS; MATERIALS; ORGANIC COMPOUNDS; RECOVERY; SACCHARIDES; SOLVOLYSIS; WELLS; 020300* - Petroleum- Drilling & Production; 550200 - Biochemistry

Citation Formats

Griffith, W.L., Compere, A.L., and Holleman, J.W. Enzymatic method for improving the injectability of polysaccharides. [US Patent Application]. United States: N. p., Web.
Griffith, W.L., Compere, A.L., & Holleman, J.W. Enzymatic method for improving the injectability of polysaccharides. [US Patent Application]. United States.
Griffith, W.L., Compere, A.L., and Holleman, J.W. . "Enzymatic method for improving the injectability of polysaccharides. [US Patent Application]". United States.
@article{osti_5118416,
title = {Enzymatic method for improving the injectability of polysaccharides. [US Patent Application]},
author = {Griffith, W.L. and Compere, A.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 = {},
month = {}
}