US 11,999,903 B2
Foaming formulations for enhanced oil recovery
Eloise Chevallier, Bordeaux (FR); and Mikel Morvan, Pessac (FR)
Assigned to ENERGY SOLUTIONS (US) LLC, Princeton, NJ (US); and IFP Energies Nouvelles, Rueil-Malmaison (FR)
Appl. No. 17/620,896
Filed by RHODIA OPERATIONS, Aubervilliers (FR); and IFP Energies Nouvelles, Rueil-Malmaison (FR)
PCT Filed Jun. 16, 2020, PCT No. PCT/EP2020/066562
§ 371(c)(1), (2) Date Dec. 20, 2021,
PCT Pub. No. WO2020/254290, PCT Pub. Date Dec. 24, 2020.
Claims priority of application No. 19181088 (EP), filed on Jun. 19, 2019.
Prior Publication US 2022/0356392 A1, Nov. 10, 2022
Int. Cl. E21B 43/16 (2006.01); C09K 8/584 (2006.01); C09K 8/594 (2006.01)
CPC C09K 8/594 (2013.01) [C09K 8/584 (2013.01); E21B 43/166 (2013.01)] 13 Claims
 
1. A composition C, suitable as foaming composition, which comprises, within an aqueous medium M:
at least one ethoxylated alkylamine; and
at least one amphoteric or zwitterionic surfactant
wherein the ethoxylated alkylamine has formula (I) below:

OG Complex Work Unit Chemistry
where:
n is a non-zero number between 1 and 12;
m is a non-zero number between 1 and 12, the sum n+m remaining below 20;
[A-] is a group comprising an alkyl group, selected from:
an alkyl group R— comprising from 8 to 22 carbon atoms;
or
an ethoxylated alkylamine group of formula:

OG Complex Work Unit Chemistry
where:
R′— is an alkyl group, comprising from 8 to 22 carbon atoms;
—R″— is an alkenyl group, a group —(CH2)q—
where q is a whole number between 2 and 5
p is a non-zero number, between 1 and 10
with the sum n+m+p remaining below 20.