In the 90’s the world started to notice the drop in light crude oil reserves but, on the other hand, people started to see the enormous potential of heavy crude oils and their great importance in the future oil business.
The highest percentage of current exploitation is focused on lighter oil resources because of its greater simplicity and lower cost of production. However, the development of new technologies has changed the equation and undoubtedly this, together with the need to increase reserves, has led to a greater exploitation of these resources.