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Title: Calcium-tolerant N-substituted acrylamides as thickeners for aqueous systems

Abstract

A water-soluble, charged, random copolymer of acrylamide and an alkali metal salt of an acrylamido-alkanoic acid such as alkali metal 3-acrylamido-3-methylbutanoate, having an average molecular weight of greater than about 50,000, has been found to maintain unusually stable and effective viscosities in the presence of salts such as NaCl and CaCl.sub.2 when added to water in minor amounts, thus making it a highly effective mobility control agent for secondary and tertiary oil recovery methods. Also within the scope of the invention are the acid form of the polymer, as well as terpolymers which additionally contain olefinically unsaturated monomers such as acrylic acid or sodium acrylate.

Inventors:
 [1];  [1]
  1. Hattiesburg, MS
Issue Date:
Research Org.:
University of Southern Mississippi
OSTI Identifier:
866174
Patent Number(s):
4649183
Assignee:
University of Southern Mississippi (Hattiesburg, MS)
DOE Contract Number:  
AS19-80BC10321
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
calcium-tolerant; n-substituted; acrylamides; thickeners; aqueous; systems; water-soluble; charged; random; copolymer; acrylamide; alkali; metal; salt; acrylamido-alkanoic; acid; 3-acrylamido-3-methylbutanoate; average; molecular; weight; 50; 000; found; maintain; unusually; stable; effective; viscosities; presence; salts; nacl; cacl; added; water; minor; amounts; highly; mobility; control; agent; secondary; tertiary; oil; recovery; methods; scope; form; polymer; terpolymers; additionally; contain; olefinically; unsaturated; monomers; acrylic; sodium; acrylate; recovery method; random copolymer; average molecular; aqueous systems; tertiary oil; minor amounts; oil recovery; alkali metal; molecular weight; metal salt; minor amount; highly effective; mobility control; unsaturated monomers; additionally contain; acrylic acid; acid form; olefinically unsaturated; n-substituted acrylamides; control agent; anoic acid; n-substituted acrylamide; unsaturated monomer; calcium-tolerant n-substituted; /526/507/

Citation Formats

McCormick, Charles L, and Blackmon, Kenneth P. Calcium-tolerant N-substituted acrylamides as thickeners for aqueous systems. United States: N. p., 1987. Web.
McCormick, Charles L, & Blackmon, Kenneth P. Calcium-tolerant N-substituted acrylamides as thickeners for aqueous systems. United States.
McCormick, Charles L, and Blackmon, Kenneth P. Thu . "Calcium-tolerant N-substituted acrylamides as thickeners for aqueous systems". United States. https://www.osti.gov/servlets/purl/866174.
@article{osti_866174,
title = {Calcium-tolerant N-substituted acrylamides as thickeners for aqueous systems},
author = {McCormick, Charles L and Blackmon, Kenneth P},
abstractNote = {A water-soluble, charged, random copolymer of acrylamide and an alkali metal salt of an acrylamido-alkanoic acid such as alkali metal 3-acrylamido-3-methylbutanoate, having an average molecular weight of greater than about 50,000, has been found to maintain unusually stable and effective viscosities in the presence of salts such as NaCl and CaCl.sub.2 when added to water in minor amounts, thus making it a highly effective mobility control agent for secondary and tertiary oil recovery methods. Also within the scope of the invention are the acid form of the polymer, as well as terpolymers which additionally contain olefinically unsaturated monomers such as acrylic acid or sodium acrylate.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {1}
}

Patent:

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