This book presents practical concepts of EOR procedures. It describes the basics of bioremediation of oil contaminated sites with a simplified elucidation of EOR procedures to speed up the recovery of oil or to displace and generate the considerable amounts of oil left behind in the reservoir during or post the course of any primary and secondary recovery procedures. It also illustrates the rising EOR technological trends and the fields that require research and development. The book stresses on the use of biotechnology to remediate the environmental footprint of crude oil generation; such as in the case of accidental oil spills in land, river, and marine environments. Therefore, this book will surely serve as a useful source of information providing practical insights to the readers.