This comprehensive book presents the latest advances in chemical EOR, considered to be an efficient technique to recover bypassed oil and residual oil trapped in reservoirs. The volume first provides an introduction to chemical EOR and discusses its viability. From there, it delves in the various EOR methods, including low-salinity water flooding, polymer and surfactant flooding, foam flooding, nanofluid flooding, hybrid methods, ionic liquid applications, and others. The book covers chemical synthesis of EOR agents and numerical simulation of compositional models in porous media, including a description of possible application of nanotechnology acting as a booster of traditional chemical EOR processes.