With increasing energy demand and high cost of conventional light oil production with low recovery, oil companies are now forced to search for unconventional oil as a major future source of hydrocarbon. As a result a variety of enhanced oil recovery (EOR) methods have been developed for increasing recovery after primary and secondary methods. After primary and secondary methods two thirds of the original oil in place (OOIP) in a reservoir is not produced and still pending for recovery by efficient EOR methods. The supplied energy may intend to maximize oil recovery by means of oil swelling,...