The main objective of Oil Recovery by Artificial Lifts Systems hinges on selecting the most suitable ALS in order to overcome or bring about a substantial reduction of the Bottom Hole Pressure (BHP) that would lead to a significant increase in differential pressure drawdown so as to maximize oil production rate in the face of the declining naturally Flowing Well Pressure (FWP) of the reservoir. In this paper, attempt was made to review the various ALS by trying to give a succinct but clear description of each method or system, its advantages, advantages as well as applications. Also, efforts were made to highlight the factors and criteria controlling proper selection of artificial lift methods to boost economic and efficient recovery of crude oil. It is a common practice that if factors such as well and reservoir indexes , location of the field, problems associated with well operations, Capital Expenditures (CAPEX) plus Operating Expenditures (OPEX) are given priority in selection of ALS, more oil could be recovered by these methods.

Keywords :  Artificial Lift Systems  Oil recovery  Selection criteria  Bottom hole pressure(BHP)  Drawdown  Production rate  Flowing well Pressure (FWP).