This chapter briefly presents the interactions between alkali and polymer and the drive mechanisms of alkaline-polymer flooding. The alkaline-polymer field cases presented in this chapter include those in Almy Sands (Isenhour Unit), Moorcroft West and Thompson Creek in Wyoming, David Lloydminster “A” Pool and Etzikom in Canada, and Xing-28 Block (Liaohe Field) and Yangsanmu in China.