Polymeric gel system and use in hydrocarbon recovery

Details Polymeric gel system and use in hydrocarbon recovery Polymeric gel system and use in hydrocarbon recovery

2008-02-19

2009-08-18

Bates, Zakiya W (Department: 3676)

Wells

Processes

Placing fluid into the formation

C166S308200

Reexamination Certificate

active

07575057

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.

REFERENCES:
patent: 6035936 (2000-03-01), Whalen
patent: 6627183 (2003-09-01), Young et al.
patent: 7183239 (2007-02-01), Smith et al.
patent: 7205262 (2007-04-01), Schwartz et al.
patent: 2002/0169085 (2002-11-01), Miller et al.
patent: WO 00/06102 (2000-02-01), None

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