Abstract
The research tried examination a nature of changing’s in the international oil market by using causality models ( simultaneous equation) , The research found a changing exchange rate of the Americans Dollar correlated with negative relationship by the price oil , While the rate of growth correlated positive relationship by it .Increasing the price oil led to increase the rate of the world growth and didn’t avoid the others factors , So will be found ,The demand for energy increasing about 30% for period 2010-2035 with insure increasing in the world’s population by 1.7 billion person for period it ,All that lead to a large increasing for energy, oil and transport