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US 12,421,444 B2Granted
Polymers and nanoparticles for flooding
AssigneeSaudi Arabian Oil Company
InventorsS. Sherry Zhu, Ayrat Gizzatov, Marta Antoniv
Life of this patent
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Abstract
A method and compounds for enhanced oil recovery (EOR) including flooding of a mixture of water and one or more of the compounds in a geological formation. The compounds have a fluoroalkyl group.
Claims20
A method comprising:
- pumping a mixture through a wellbore into a geological formation, the mixture comprising a surfactant, salt, water, and polymer nanoparticles comprising core-shell nanoparticles each having a core and a shell, wherein the core comprises a polystyrene center, and wherein the shell comprises a zwitterionic group and a fluoro functional group covalently attached to the core;
- and
- flowing the mixture through the geological formation, wherein the pumping and the flowing comprise enhanced oil recovery (EOR) comprising flooding, wherein the flooding of the geological formation increases oil recovery from a reservoir in the geological formation, and wherein:
- the flooding comprises nanofluid flooding;
- and
- the fluoro functional group comprises at least one of the following structures:
3 more elements
A method of enhanced oil recovery (EOR), comprising:
- injecting a mixture through a wellbore into a geological formation, the mixture comprising water and polymer nanoparticles comprising core-shell nanoparticles each having a core and a shell, wherein the core comprises a polystyrene center, and wherein the shell comprises a zwitterionic group and a fluoro functional group covalently attached to the core;
- and
- flooding the geological formation with the mixture,
- wherein the fluoro functional group comprises at least one of the following structures:
1 more element
A method of enhanced oil recovery (EOR), comprising:
- injecting a mixture through a wellbore into a geological formation, the mixture comprising water and polymer nanoparticles having a fluoro functional group;
- flooding the geological formation with the mixture;
- wherein:
- the polymer nanoparticles comprise core-shell nanoparticles comprising a core and a shell, wherein the core comprises a polystyrene center, and wherein the shell comprises a zwitterionic group and the fluoro functional group covalently attached to the core;
- and
- the fluoro functional group comprises at least one of the following structures:
3 more elements
Dependencies are inferred from the claim text.