Jintao Wu

Apr 7, 2024 | onlinelibrary.wiley.com | Dong Zhao |Jintao Wu |Jian Hou |Qingjun Du

1 INTRODUCTION Chemical flooding is an important method for improving the recovery of water flooding mature oilfields1-3 and includes polymer flooding, surfactant flooding, and polymer–surfactant flooding.4 In polymer–surfactant flooding, polymers and surfactants work together to reduce interfacial tension and increase sweep.5 Because no alkali is needed in polymer–surfactant flooding, the scaling problem of alkali–polymer–surfactant flooding can be avoided.6-8 However, due to the...