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Hydrolytic stability of alkylethoxy sulfates

Journal Article · · SPE (Society of Petroleum Engineers) Reserv. Eng.; (United States)
DOI:https://doi.org/10.2118/14912-PA· OSTI ID:5409551
Sulfate surfactants are being proposed by industry for use in moderate-temperature surfactant floods. Sulfates are also being considered by some groups for use in CO/sub 2/ mobility control and surfactant/alkaline floods. Data from this study show that the maximum applicable temperatures for sulfates under these pH conditions are much lower than for neutral pH conditions. Rate equations are derived from Arrhenius data on the basis of observed decomposition mechanisms. The equations are used to calculate surfactant lifetimes and maximum temperature limits at various reservoir conditions. The maximum temperatures and lifetimes are functions of pH and brine composition.
Research Organization:
Exxon Production Research and Engineering Co. (US)
OSTI ID:
5409551
Journal Information:
SPE (Society of Petroleum Engineers) Reserv. Eng.; (United States), Journal Name: SPE (Society of Petroleum Engineers) Reserv. Eng.; (United States) Vol. 3:1; ISSN SREEE
Country of Publication:
United States
Language:
English