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1. (WO2018022701) ADDITION OF MONOVALENT SALTS FOR IMPROVED VISCOSITY OF POLYMER SOLUTIONS USED IN OIL RECOVERY APPLICATIONS

Pub. No.:    WO/2018/022701    International Application No.:    PCT/US2017/043863
Publication Date: Fri Feb 02 00:59:59 CET 2018 International Filing Date: Thu Jul 27 01:59:59 CEST 2017
IPC: C09K 8/588
Applicants: SAUDI ARABIAN OIL COMPANY
ARAMCO SERVICES COMPANY
Inventors: HASSAN, Saleh F.
ALSOFI, Abdulkareem, M.
Title: ADDITION OF MONOVALENT SALTS FOR IMPROVED VISCOSITY OF POLYMER SOLUTIONS USED IN OIL RECOVERY APPLICATIONS
Abstract:
An oil recovery composition having a brine, a hydrolyzable polymer, and a monovalent cations to divalent cations ration in the range of about 3:1 to about 4.5:1 is provided. An oil recovery composition may be formed from a brine recovered from production water and a polymer. A monovalent salt may be added to the brine recovered from production water to form a modified brine and achieve a modified monovalent cations to divalent cations ratio in the range of about 3:1 to about 4.5:1. Processes for forming the oil recovery composition and enhanced oil recovery using the oil recovery composition are provided.