 This paper presents a comprehensive review of enhanced oil recovery, EOR, technologies and their potential to increase final recovery factors and various types of reservoirs with a focus on sandstone and carbonate formations, turbiditic reservoirs, offshore and onshore fields, discussing risk and rewards of EOR methods including recent trends such as CO2 injection, high pressure air injection, HPAI, and chemical flooding. Along with an overview of CO2 EOR project economics. This article was authored by Vladimir Alvarado and Eduardo Menrique.