Polymer-microemulsion complexes for the enhanced recovery of oil
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United States of America Patent
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Oct 12, 1982
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N/A
app pub date -
Apr 3, 1980
filing date -
Apr 3, 1980
priority date (Note) -
Expired
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Abstract
A polymer-microemulsion complex useful for the enhanced recovery of crude oil is disclosed. The polymer is polyethylene oxide or polyvinyl pyrrolidone and interacts with the surfactant of the microemulsion to form a physical association. The resulting complex is characterized by a complexation energy of at least 2 Kcal/mole. The polymer microemulsion complexes are stable at high salinity, reduce adsorption and retention by the formation, lower interfacial tension, achieve retentions as low as 0.1 mg surfactant/gm sand at high salinity and provide for early banking, as well as high recovery of oil.
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