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- W2793646598 abstract "Abstract Stabilization of CO2-in-water (C/W) foams with surfactants at high temperature and high salinity conditions is challenging given limitations in the solubility and thermal stability of surfactants, particularly for surfactants other than anionic ones. Here we show that a single zwitterionic surfactant, cetyl betaine (CH3(CH2)15N+(CH3)2CH2COO−), stabilizes viscous C/W foam (>15 cP) in crushed limestone (76-Darcy) at a temperature up to 150 °C and over a wide range in salinity up to 22% total dissolved solids (TDS) at superficial velocity of 940 ft/day. According to liquid chromatography mass spectrometry (LC/MS), cetyl betaine has high thermal stability with negligible chemical degradation after incubation at 135 °C for 30 days. Interfacial tension (IFT) at the C/W interface was reduced significantly from ∼37 mN/m to 20 cP) within 6 pore volumes of injection at 120 °C. The surfactant stabilized viscous C/W foam at low oil fractions and broke in the presence of large fractions of oil, both of which are desirable in CO2 mobility control and oil displacement. The ability to form foams at high temperatures and over a wide range in salinity is important for various practical applications including CO2 enhanced oil recovery, fracturing with energized fluids and CO2 sequestration." @default.
- W2793646598 created "2018-03-29" @default.
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- W2793646598 date "2018-07-01" @default.
- W2793646598 modified "2023-10-12" @default.
- W2793646598 title "Carbon dioxide/water foams stabilized with a zwitterionic surfactant at temperatures up to 150 °C in high salinity brine" @default.
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- W2793646598 doi "https://doi.org/10.1016/j.petrol.2018.03.071" @default.
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