الفهرس 
Chapter One -- IntroductionOnly 14 pages are availabe for public view
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Abstract
More than 60% of oil production is left in the reservoirs after primary and
secondary recovery; so researchers do their best to find cheap and applicable methods for enhancement of oil recovery Use of acoustic vibration has been proposed as a low cost improving oil recovery method, giving successful field results when applied. A key difficulty with the method is that its mechanism for oil recovery is not yet known. The research discusses the laboratory effects of this technique using an Egyptian oil field samples. Four groups of samples have been used. Each group consists of two twin samples almost similar in their properties. The first group of plugs has been taken from high permeability reservoir rocks while the other groups of samples have been taken from relatively low permeability reservoir rocks. Ultrasonic waves have been applied to one core sample from each group when the samples are saturated with oil at initial water saturation which models the reservoir at the first age, While Ultrasonic waves have been applied to the other core sample from each group when they are saturated with brine at residual oil saturation which model the end age of the reservoir. Oil/water relative permeability has been calculated to evaluate the flooding performance before and after applying ultrasonic waves. In addition, water fractional flow curves have been considered to determine the average water saturation at breakthrough before and after applying ultrasonic waves. The results showed that applying ultrasonic waves has higher effect in low permeability reservoir and can mobilize additional oil varying from 8% to 11% of original oil in place comparing with oil recovery 3-5% of original oil in place in high permeability reservoirs.