(19)
(11) EP 4 739 746 A1

(12)

(43) Date of publication:
13.05.2026 Bulletin 2026/20

(21) Application number: 25734607.2

(22) Date of filing: 16.06.2025
(51) International Patent Classification (IPC): 
C09K 8/588(2006.01)
E21B 43/20(2006.01)
 C08F 220/56(2006.01)
(52) Cooperative Patent Classification (CPC):
C09K 8/588; E21B 43/20; C08F 220/585; C08F 220/56
 
C-Sets:
  1. C08F 220/585, C08F 220/56;
  2. C08F 220/56, C08F 220/585;
(86) International application number:
PCT/EP2025/066788
(87) International publication number:
WO 2026/068023 (02.04.2026 Gazette 2026/14)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA
Designated Validation States:
GE KH LA MA MD TN

(30) Priority: 30.09.2024 FR 2410502

(71) Applicant: SNF Group
42160 Andrézieux-Bouthéon (FR)

(72) Inventors:
  • RIVAS, Christophe
    42160 Andrézieux-Bouthéon (FR)
  • DUPUIS, Guillaume
    42160 Andrézieux-Bouthéon (FR)
  • BLONDEL, Frédéric
    42160 Andrézieux-Bouthéon (FR)

(74) Representative: Ipsilon 
Le Contemporain 50 Chemin de la Bruyère
69574 Dardilly Cedex
69574 Dardilly Cedex (FR)

   


(54) METHOD FOR THE ENHANCED RECOVERY OF HYDROCARBONS BY SEQUENTIAL INJECTION OF POLYMER COMPOSITIONS