Many years ago I read a report that asserted that under Colorado was a pool of ~2T BBLs of oil. I wonder if you have any familiarity with that region and can comment on that quantity of reserves. Also, the geological processes I have very little understanding of yet clearly produce hydrocarbons through purely geochemical processes, as Titan, the moon of Saturn, clearly never had herds of dinosaurs yet has lakes, and even rains, of hydrocarbons. While I am certain that ancient biological remains produce gas, petroleum, and coal, it seems quite obvious that significant petroleum is produced by abiogenic processes.

Is this an accurate assessment of the genesis of petroleum, on Earth as well as other bodies, and does Colorado have significant - the most copious in the world - reserves of oil?

Thanks!

Edit: also I have worked in shipyards, and learned ships asea use very viscous crude as 'bunker' fuel. As US refineries tend to be used to process the light crude produced here, is there domestic capacity to produce the bunker fuel required by shipping, and the primary market for Venezuelan sour crude?