US 11,718,780 B2
Foamed scale removal and inhibition method for subterranean formation
Prasad Baburao Karadkar, Dhahran (SA); and Bader G. Harbi, Dhahran (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on Dec. 15, 2021, as Appl. No. 17/644,370.
Prior Publication US 2023/0183552 A1, Jun. 15, 2023
Int. Cl. E21B 43/27 (2006.01); C09K 8/528 (2006.01); C09K 8/536 (2006.01); C09K 8/74 (2006.01); E21B 37/06 (2006.01); C09K 8/70 (2006.01); C09K 8/60 (2006.01)
CPC C09K 8/528 (2013.01) [C09K 8/536 (2013.01); C09K 8/604 (2013.01); C09K 8/703 (2013.01); C09K 8/74 (2013.01); E21B 37/06 (2013.01); E21B 43/27 (2020.05)] 6 Claims
OG exemplary drawing
 
1. A composition comprising:
a nonionic fluorinated polymeric surfactant, comprising:
0.1% to 10% by weight based on a total weight of the nonionic fluorinated polymeric surfactant of one or more alkylene oxide monomer units represented by formula I:

OG Complex Work Unit Chemistry
wherein n is 2 to 10;
0.1% to 10% by weight based on the total weight of the nonionic fluorinated polymeric surfactant of units derived from a monomer having a structure represented by formula II:

OG Complex Work Unit Chemistry
Wherein R is a perfluoroalkyl group having from 1 to 8 carbons atoms;
a nonfluorinated surfactant; and
a scale treatment selected from the group consisting of a scale dissolver.