Residual oil start-up mechanism of polymer/surface dual flooding after polymer flooding in medium-high permeability reservoirNan Zhang, Yuwen Zhao, Wei Wang, Xiaoyan Wang, Xi Yan, Guangyu Yuan, Zeyu Lin, Yuanxian Liu and Jing ZhangE3S Web Conf., 375 (2023) 01041DOI: https://doi.org/10.1051/e3sconf/202337501041