When looking at the map of the middle east, it really brings some things to light. For example, most of the terrain that is rich with oil is flat and near bodies of water. This is most likely because the Oil is easier to drill when it is near sea level, because it is easier to drill out of the ground. Also, most of the large oil producing areas have very low populations, which could be because of the fact that oil drilling is a large deal. It probably is not very pleasing to live next to a large oil plantation, due to the toxins and other health risks. 

Lastly, this population also increases the GPD, because there aren't that many people per capita and most of the people involved with oil are wealthy because it really is "Black Gold".