公开(公告)号：US20200263077A1

公开(公告)日：2020-08-20

申请号：US16444435

申请日：2019-06-18

Applicant: King Fahd University of Petroleum and Minerals

Inventor： Syed M. Shakil HUSSAIN ,  Muhammad Shahzad KAMAL

IPC: C09K8/584 ,  C09K8/588

Abstract: A method of recovering oil from a reservoir using an aqueous composition that contains an unsaturated zwitterionic surfactant and a copolymer. The unsaturated zwitterionic surfactant is an amidoamine-based surfactant having a sulfonate head group and an alkenyl tail. The copolymer contains reacted units of acrylamide and 2-acrylamido-2-methylpropane sulfonic acid (AM-AMPS). This method is particularly effective for enhanced oil recovery in carbonate reservoirs of high temperature and/or high salinity.