As the global energy demand is growing, all hydrocarbon resources, particularly heavy and extra-heavy crude oil, need to be used. However, the decline in light crude oil reserves makes it attractive to use heavy and extra-heavy oil to meet energy requirements due to recoverable oil capacity. Despite the importance and high volumes of heavy crude oil reserves, development, production and refining are difficult due to its physico-chemical properties, mainly its high density and viscosity, low API gravity and high hydrocarbon content Heavy crude (HO) and extra-heavy crude (EHO) crude oils usually have a large percentage of heavy components such as resins and asphalt which reduce API gravity.