Back to results
US 2025/0026977 A1Published application
Thermal stimuli-responsive surfactants for enhanced oil recovery
AssigneeSaudi Arabian Oil Company
InventorsLimin Xu, Ming Han, Tianping Huang
Life of this patent
Estimating the term…
Abstract
This disclosure relates to thermal stimuli-responsive surfactant mixtures useful for reducing water/oil interfacial tension at high temperatures and increasing water/oil interfacial tension at low temperatures. The disclosure also relates to methods of using the surfactant mixtures for enhanced oil recovery applications.
Claims22
1-15. (canceled)
An aqueous solution comprising:
- about 0.01 wt % to about 1 wt % of a thermal stimuli-responsive surfactant mixture comprising:
- an anionic surfactant selected from the group consisting of alkylphenol ethoxylate carboxylate (APEC), sodium alkyl ethoxylate carboxylate (AEC), sodium alkylphenol ethoxylate sulfate (APES) and sodium alkyl ethoxylate sulfate (AES);
- and
- a cationic surfactant selected from the group consisting of dodecyltrimethylammonium bromide (DTAB), dodecyltrimethylammonium chloride (DTAC), tetradecyltrimethylammonium bromide (TTAB), tetradecyltrimethylammonium chloride (TTAC), cetyltrimethylammonium bromide (CTAB), and cetyltrimethylammonium chloride (CTAC);
- wherein at least one of the anionic surfactant or cationic surfactant comprises one or more nonionic groups;
- and
- water.
4 more elements
Dependencies are inferred from the claim text.