US 12,012,549 B2
Methods of using olefin sulfonates
Varadarajan Dwarakanath, Houston, TX (US); Gayani W. Pinnawala, Katy, TX (US); Andrew M. Thomas, El Sobrante, CA (US); Curtis B. Campbell, Hercules, CA (US); Andrew M. Davidson, San Ramon, CA (US); and Ping Wang, Fremont, CA (US)
Assigned to CHEVRON USA INC, San Ramon, CA (US); and CHEVRON ORONITE COMPANY LLC, San Ramon, CA (US)
Appl. No. 17/770,559
Filed by CHEVRON ORONITE COMPANY LLC, San Ramon, CA (US); and CHEVRON U.S.A. INC., San Ramon, CA (US)
PCT Filed Oct. 30, 2020, PCT No. PCT/US2020/058313
§ 371(c)(1), (2) Date Apr. 20, 2022,
PCT Pub. No. WO2021/087328, PCT Pub. Date May 6, 2021.
Claims priority of provisional application 62/929,023, filed on Oct. 31, 2019.
Prior Publication US 2022/0389304 A1, Dec. 8, 2022
Int. Cl. C09K 8/68 (2006.01); C09K 8/60 (2006.01); C09K 8/70 (2006.01)
CPC C09K 8/68 (2013.01) [C09K 8/604 (2013.01); C09K 8/703 (2013.01)] 20 Claims
 
1. A method for performing an operation a subterranean formation, the method comprising:
introducing an aqueous fluid comprising water and a surfactant package through a wellbore to contact the subterranean formation;
wherein the surfactant package comprises an olefin sulfonate;
wherein the olefin sulfonate is a propylene oligomer comprising one or more sulfonate groups, and
wherein the propylene oligomer has an average total branching of about 3 to about 15 per molecule.