(19)
(11) EP 3 850 054 A1

(12)

(43) Date of publication:
21.07.2021 Bulletin 2021/29

(21) Application number: 19779254.2

(22) Date of filing: 12.09.2019
(51) International Patent Classification (IPC): 
C09K 8/588(2006.01)
C09K 8/594(2006.01)
(86) International application number:
PCT/US2019/050881
(87) International publication number:
WO 2020/068443 (02.04.2020 Gazette 2020/14)
(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 MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30) Priority: 24.09.2018 US 201816140062

(71) Applicant: Saudi Arabian Oil Company
Dhahran 31311 (SA)

(72) Inventors:
  • AYIRALA, Subhash, Chandrabose
    Dhahran, 31311 (SA)
  • AL-YOUSEF, Ali, Abdallah
    Dhahran, 31311 (SA)
  • AL-SOFI, Abdulkareem, M.
    Dhahran, 31311 (SA)

(74) Representative: Dauncey, Mark Peter 
Marks & Clerk LLP 1 New York Street
Manchester M1 4HD
Manchester M1 4HD (GB)

   


(54) OIL RECOVERY PROCESS USING AN OIL RECOVERY COMPOSITION OF AQUEOUS SALT SOLUTION AND DILUTE POLYMER FOR CARBONATE RESERVOIRS