Definition SAGD is the acronym of Steam Assisted Gravity Drainage. The Steam Assisted Gravity Drainage is a process to produce oil from tar-sands. Comments The SAGD process has been developed in Ontario, then in Alberta by Imperial Oil (ExxonMobil) in the years 1970s. Canada holds the most important reserves of extra heavy crude oil, also called …

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Heavy Crude Oil

Definition Heavy crude oil  and extra heavy crude oil is any type of  crude oil which does not flow easily. Physically heavy crude oil have higher viscosity and density or specific gravity with an heavier molecular composition Heavy crude oil has been defined as any liquid petroleum with an API gravity less than 20°. Extra Heavy crude oil have an API gravity …

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