	US 11,970,657 B2
	Carbonate-based solvents for scale-squeeze enhancement
Sankaran Murgesan, Katy, TX (US); Jerry J. Weers, Richmond, TX (US); Onome Ugono, Rosenberg, TX (US); Jeffrey A. Russek, Pearland, TX (US); and Dong Lee, Stafford, TX (US)
Assigned to Baker Hughes Oilfield Operations LLC, Houston, TX (US)
Filed by Baker Hughes Oilfield Operations LLC, Houston, TX (US)
Filed on May 26, 2022, as Appl. No. 17/826,093.
Prior Publication US 2023/0383172 A1, Nov. 30, 2023
Int. Cl. C09K 8/528 (2006.01); C09K 23/38 (2022.01); C09K 23/40 (2022.01); C09K 23/56 (2022.01)

CPC C09K 8/528 (2013.01) [C09K 23/38 (2022.01); C09K 23/40 (2022.01); C09K 23/56 (2022.01)]

10 Claims

1. A scale inhibitor squeeze treatment method, the treatment comprising:

injecting a pre-flush solution into a wellbore;

injecting a main treatment solution containing at least one scale inhibitor into the wellbore;

injecting a post-flush solution into the wellbore;

shutting-in the well for a period of time; and

subsequently producing oil from the wellbore;

where the pre-flush solution comprises:

at least one organic carbonate solvent selected from the group consisting of glycerol carbonate, dimethyl carbonate, diethyl carbonate, dibutyl carbonate, and combinations thereof;

at least one surfactant, wherein the at least one surfactant is a nonylphenol;

optionally at least one co-surfactant;

optionally at least one co-solvent; and

optionally at least one hydrocarbon.