Chemical flooding in the oil reservoirs began as far back as the early 1920s. From the early 1990s, chemical flooding has progressed considerably facilitating huge amounts of oil production. Attention has most recently been turned towards chemicals such as surfactants, polymers, and nanoparticles to enhance fluid flow by overcoming strong chemical bonding between rock-fluid and fluid-fluid interfaces. This book begins with the fundamentals aimed at those with basic knowledge of petroleum engineering. The author's objective is to deliv-er an uncomplicated introduction to the field of chemical flooding for oil recovery.