Russia to cut export duty on ultra-heavy oil to stimulate production
Green Car Congress
MARCH 2, 2012
Kazakhstan and Russia have the largest amounts of bitumen after. 2007, Heavy oil and natural bitumen resources in geological basins of the world: US Geological Survey Open-File Report 2007-1084. Natural bitumen is oil having a viscosity greater than 10,000 cP. billion barrels of technically recoverable heavy oil and 33.7
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