Voici un article en 2 parties sur la folie des gaz bitumineux d’arthabasca. La traduction du titre est: Les sables bitumineux: La dernière injection du junkie. Le tout provenant du site OilDrum. Finalement ce qu’on y dit c’est que l’énergie injectée pour extraire 1 baril de pétrole est .90 à .95 baril de pétrole. En fait les compagnies songent à se retirer si le gouvernement fédéral n’absorbe pas une partie importante de la facture… Pourtant ces compagnies ont déjà l’eau gratos!!! Il demandent que le fédéral batisse des centrales nucléaires pour la demande énergie de l’extraction. Il ne faut pas manquer ceci !
Partie 1 For this week’s article, I collaborated with energy journalist Roel Mayer, a freelance writer on earth, energy and economy, based in Canada. Roel is a keen observer on energy, and the Canadian tar sands in particular, so he was a natural research partner for this short study on the state of oil production from tar sands.
He was also the one who coined « The Law of Receding Horizons. » For those who missed my previous articles on receding horizons, it is a simple concept: as the cost of energy rises, the cost of everything else made with energy (like building materials) also rises. So an energy project which was expected to be profitable when energy costs were x amount higher than today, turns out to still be uneconomical when you get there.
Perhaps the most paradoxical part of the tar sands receding horizons problem is the need for energy.
Typically, tar sands are produced using natural gas to heat the steam that drives the oil out of the sands. It takes a lot of gas to do this: over 1,000 cubic feet–about $8 worth–to produce one barrel of bitumen.
At the current production level of about 1 mpbd, the tar sands operations consume about 4% of Canada’s natural gas supply. So quadrupling production would consume fully 16% of the supply, and completely max out the gas market. Nearly all estimates for tar sands operations over the next ten years exceed the projections for available amounts of natural gas!
Canada’s natural gas supplies are running out fast. Numbers from the EIA and the NEB suggest that its proven reserves of natural gas will be gone in about eight years.