bigfish said:
In short, it's just a question of supply and demand and how the price of a commodity depends on how much of it consumers want.
Unfortunately, that is only one of the questions. The other question is the amount of energy involved in the extraction process. It takes energy to get energy. With light crude, the ratio of energy out over energy in is so high (around 100 to one) that the manufacturing energy is insignificant. Until now, the energy system has been dominated by light, sweet crude and we are as unaware of its unique energy ratio as fish are of water. (The ratio is so high that oil is effectively free, which is why a cup of McDonalds Coke costs £1 while the same volume of crude would cost around £0.10).
With deep water and remote areas, this ratio even for conventional oil is falling to around 5-8 barrels of oil out for every barrel of energy spent. Tar sands and other unconventional sources, while existing in large quantities, require between one half and one barrel of oil in manufacturing energy for every barrel of oil extracted - in other words, after meeting its own processing energy needs, there is no oil left left for us. That is why they are 'unconventional' i.e. they have been left until last. To put another way, to process 1,360,000,000,000 barrels of Venezuelan Tar Sand oil will require around 1,360,000,000,000 barrels of oil.
To make 1
barrel of oil from tar sand, you need 2
tonnes of sand, 8
tonnes of water and one thousand standard cubic feet of gas. You superheat the water with the gas and boil the sand in the water to produce 10 tonnnes of slightly radioactive slurry and three times more CO2 than is produced in conventional oil production.
At 2 million barrels per day of tar sand, Canadian tar sand production assumed by the USGS projection (the amount that is necessary to avoid failure of the world economy) would have required one quarter of Canada's daily gas production. Canada will be unable to meet existing (non-tar sand) gas consumption in 8 years time. It literally does not rain enough in Canada to maintain replacement volumes in its aquifers even at today's water offtake rates - the Canadian government is already having to withdraw water permits from conventional oil production operations due to the unsustainable depletion of its water aquifers, and the associated impact on irrigation and food production. There is no means of supplying a further 16 million barrels a day of water to drive tar sand manufacture. The slurry disposal volume represents about the capacity of Lake Ontario each year, for which there is no known technical storage or (net positive energy) processing solution.
There is no oil price at which these underlying physical constraints ease and Tar Sand operations (including Venezuela's) maintain the illusion of being net energy suppliers only to the extent that they benefit from hidden conventional hydrocarbon energy subsidies (look at the size of the truck in the image above, consider that Shell runs hundreds of these vehicles nose to tail in chains tens of miles long, and then ask yourself, for the materials used to construct them, where the energy comes from to mine, refine, transport to manufacturing facilities and assemble the trucks, and the energy required to operate them). Tar sand oil operations are, in effect, an energy-negative system for converting gas into gasoline for the U.S. automotive market. No gas - no tar sand oil.
The economic system and the underlying physical system are quite separate, and governed by quite different laws. The sort of naive analysis that bigfish presents is typical of that provided by those who don't really understand the physical system (i.e. economists), and cannot therefore differentiate reliably between the laws that govern energy systems and those that govern, say, sportswear apparel systems...