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US 12,686,809 B2Granted
Methods and formulations for treating oil-containing porous media for oil recovery
AssigneeUniversity of Wyoming
InventorsMohammad Piri, Youssra Rahham, Lamia Goual, Maziar Arshadi, Morteza Akbarabadi
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Abstract
Embodiments of the present disclosure generally relate to methods and formulations for enhanced oil recovery. In an embodiment, a method for treating oil-containing porous media for oil recovery includes introducing oil-containing porous media with a surfactant formulation described herein. Methods can be utilized for, e.g., wettability reversal or oil recovery. Surfactant formulations are also described.
Claims13
A method for treating oil-containing porous media for oil recovery, the method comprising:
- introducing a surfactant formulation with a reservoir comprising oil-containing porous media, the oil-containing porous media being oil-wet prior to introducing with the surfactant formulation, the surfactant formulation comprising a surfactant A and a surfactant B:
- wherein:
- at least one surfactant A is present, and for each surfactant A present, each of R1, R2, and R3 is methyl, R4 is an alkyl group having 18 carbon atoms, and X is, independently, bromide or chloride;
- and
- R5 of surfactant B is an alkyl group having 13 carbon atoms, and n of surfactant B is 18;
- reversing a wettability of the oil-containing porous media from oil-wet towards water-wet by contacting the oil-containing porous media with the surfactant formulation;
- and
- recovering oil from the oil-containing porous media.
5 more elements
Dependencies are inferred from the claim text.