Orinoco Oil Belt

   In addition to conventional oil, Venezuela has oil sands deposits similar in size to those of Canada, and approximately equal to the world's reserves of conventional oil. Venezuela's Orinoco tar sands are less viscous than Canada's Athabasca oil sands – meaning they can be produced by more conventional means – but they are buried too deep to be extracted by surface mining. Estimates of the recoverable reserves of the Orinoco Belt range from 100 billion barrels (16×109 m3) to 270 billion barrels (43×109 m3). In 2009, USGS updated this value to 513 billion barrels (8.16×1010 m3).

   According to the United States Geological Survey, the Orinoco Belt alone is estimated to contain 900–1,400 billion barrels (2.2×1011 m3) of heavy crude in proven and unproven deposits. Of this, the United States Geological Survey estimated that 380–652 billion barrels (1.037×1011 m3) could be technically recoverable, which would make Venezuela's total recoverable reserves (proven and unproven) among the largest in the world. The technology needed to recover ultra-heavy crude oil, such as in most of the Orinoco Belt, may be much more complex and expensive than that of Saudi Arabia's light oil industry.