Enhanced oil recovery methods and systems
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United States of America Patent
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Mar 27, 1984
Grant Date -
N/A
app pub date -
Jul 14, 1981
filing date -
Jul 14, 1981
priority date (Note) -
Expired
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Abstract
Methods of preparing viscous aqueous polymer solutions having improved viscosity and stability properties for use in the treatment of subterranean hydrocarbon-containing formations and in enhanced oil recovery processes are provided. Methods and systems for enhancing the recovery of oil from subterranean oil-containing formations are also provided. The viscous aqueous polymer solutions of the invention are prepared by polymerizing one or more water soluble polymerizable vinyl monomers in a substantially oxygen-free aqueous solvent and then further diluting the resultant concentrated solution in additional solvent. Such viscous aqueous polymer solutions have improved viscosity properties and increased compatibility with oil well treating fluid additives, especially clay stabilizers.
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