US 11,987,748 B2
Polymers and nanoparticles for flooding
S. Sherry Zhu, Waban, MA (US); Ayrat Gizzatov, Cambridge, MA (US); and Marta Antoniv, Cambridge, MA (US)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Dec. 13, 2022, as Appl. No. 18/080,440.
Application 18/080,440 is a division of application No. 16/883,806, filed on May 26, 2020, granted, now 11,566,165.
Claims priority of provisional application 62/854,791, filed on May 30, 2019.
Prior Publication US 2023/0116506 A1, Apr. 13, 2023
Int. Cl. C09K 8/588 (2006.01); C08F 212/14 (2006.01); C08F 220/06 (2006.01); C08F 220/22 (2006.01); C08F 220/24 (2006.01); C08F 220/56 (2006.01); E21B 43/20 (2006.01)
CPC C09K 8/588 (2013.01) [C08F 212/20 (2020.02); C08F 220/06 (2013.01); C08F 220/22 (2013.01); C08F 220/24 (2013.01); C08F 220/56 (2013.01); E21B 43/20 (2013.01); C09K 2208/10 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method comprising:
pumping a mixture through a wellbore into a geological formation, the mixture comprising a surfactant, salt, water, and polymer nanoparticles having a fluoroalkyl group; and
flowing the mixture through the geological formation,
wherein:
the pumping and the flowing comprise enhanced oil recovery (EOR) comprising flooding:
the flooding of the geological formation increases oil recovery from a reservoir in the geological formation;
the flooding comprises nanofluid flooding,; and
the polymer nanoparticles having the fluoroalkyl group comprise polymers with the following polymeric structure:

OG Complex Work Unit Chemistry
where R1 is —CH2CF3, —CH(CF3)2, or —C(CF3)3, and where R2 is H or CH3.