Polymeric gel system and use in hydrocarbon recovery
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United States of America Patent
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Issued Date -
Jun 19, 2003
app pub date -
Aug 27, 2002
filing date -
Dec 12, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Coacervate gels having excellent shear viscosities and other properties are made with anionic or cationic polymers, a smaller amount of a surfactant having a charge opposite that of the polymer, and a hydrophobic alcohol. The Zeta Potential of the gel is maintained at an absolute value of at least 20. Optional gel promoting additives include betaines and amine oxides. A preferred gel comprises poly diallyl dimethyl ammonium chloride, a lesser amount of sodium lauryl sulfonate, and lauryl alcohol. The gels are particularly useful in well drilling fluids and well fracturing fluids.
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