IP Library › Granted Patent US 12,421,444
Granted Patent B2
US 12,421,444 · App. 18/635,495 · Granted Sep 23, 2025

Polymers and nanoparticles for flooding

Inventors: S. Sherry Zhu (Waban, MA); Ayrat Gizzatov (Cambridge, MA); Marta Antoniv (Cambridge, MA)
Assignee: Saudi Arabian Oil Company
C09K8/588C08F212/20C08F220/06C08F220/22C08F220/24C08F220/56E21B43/20C09K2208/10
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Quick Facts
Patent No.
US 12,421,444
App. No.
18/635,495
Granted
Sep 23, 2025
Kind
B2
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.

Claims (32)

1. 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:

2. The method of claim 1 , wherein the salt comprises sodium chloride.

3. The method of claim 1 , wherein the water comprises seawater or brine.

4. The method of claim 1 , wherein the fluoro functional group comprises at least two of the following structures:

5. The method of claim 1 , wherein the fluoro functional group comprises each of the following structures:

6. The method of claim 1 , wherein the fluoro functional group comprises the following structure:

7. The method of claim 1 , wherein the fluoro functional group comprises the following structure:

8. The method of claim 1 , wherein the fluoro functional group comprises the following structure:

9. 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:

10. The method of claim 9 , wherein the flooding of the geological formation increases oil production of a well.

11. The method of claim 9 , wherein the fluoro functional group comprises at least two of the following structures:

12. The method of claim 9 , wherein the fluoro functional group comprises each of the following structures:

13. The method of claim 9 , wherein the fluoro functional group comprises the following structure:

14. The method of claim 9 , wherein the fluoro functional group comprises the following structure:

15. The method of claim 9 , wherein the fluoro functional group comprises the following structure:

16. 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:

17. The method of claim 16 , wherein the fluoro functional group comprises at least two of the following structures:

18. The method of claim 16 , wherein the fluoro functional group comprises the following structure:

19. The method of claim 16 , wherein the fluoro functional group comprises the following structure:

20. The method of claim 16 , wherein the fluoro functional group comprises the following structure:

Assignments (3)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 19, 2024
From: ZHU, S. SHERRY; GIZZATOV, AYRAT; ANTONIV, MARTA
To: ARAMCO SERVICES COMPANY
Reel/Frame 067170/0661 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 19, 2024
From: ARAMCO SERVICES COMPANY
To: SAUDI ARABIAN UPSTREAM TECHNOLOGY COMPANY
Reel/Frame 067170/0718 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 19, 2024
From: SAUDI ARABIAN UPSTREAM TECHNOLOGY COMPANY
To: SAUDI ARABIAN OIL COMPANY
Reel/Frame 067170/0747 →
Continuity (4)
Division 18080443 · Dec 13, 2022
Division 16883806 · May 26, 2020
Provisional Application 62854791 · May 30, 2019
Related Publication 20240417618A1 · Dec 19, 2024
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