Ce qui se déplace réellement
Athabasca bitumen sits in sand near the surface. It is strip-mined, washed out with hot water, and then either upgraded on site into a synthetic crude or thinned with condensate and pipelined south. It is the clearest place where the mining industry and the oil industry are the same industry.
- Le matériau
- Oil Sands & Bitumen
- La variété
- Bitumen in sand, roughly 8° API, 10–12% bitumen by weight
- Où cela commence
- Canada — The Athabasca deposit, northern Alberta
Étape par étape, et frontière par frontière
Canada · Athabasca, Alberta détenu par Oil sands operators (Mineur)
A mine, in every sense
Overburden is stripped and the oil sand is loaded by electric shovel into 400-tonne haul trucks. The ore grade is quoted in percent bitumen exactly as a copper mine quotes percent copper.
Pourquoi ici: Shallow deposits only. Where the bitumen is too deep to mine, steam is injected instead and it is produced through wells.
Canada · Extraction plant détenu par Oil sands operators (Mineur)
Washing the oil off the sand
The sand is slurried in hot water and agitated. Bitumen floats to the top as a froth; sand and clay sink and go to the tailings pond.
Ce qu'il est advenu du reste: About 890 tonnes of sand, clay and water per 1,000 tonnes mined goes to tailings. Managing that residue is the defining environmental question of the whole industry.
Pourquoi ici: Hot-water separation only works on mined ore, and the ore is too heavy to ship anywhere. The plant is beside the mine because it has to be.
Canada · Upgrader, or a diluent blending terminal détenu par Operators and midstream companies (Affineur)
Upgrade here, or dilute and send it south
An upgrader cokes and hydrotreats the bitumen into synthetic crude oil of about 31° API. The alternative is to blend in roughly 30% condensate to make dilbit, which can be pipelined but arrives as somebody else's refining problem.
Ce qu'il est advenu du reste: Upgrading rejects carbon as petroleum coke — millions of tonnes of it are stockpiled in Alberta because there is no local market.
Pourquoi ici: Upgrading in Alberta keeps the conversion value in Canada; diluting exports it. The same decision the Venezuelan route faces, with the same trade-off.
United States · To the US Midwest and Gulf Coast détenu par Pipeline operators (Négociant)
1,500 km of pipeline
Pumped south. The condensate in dilbit is separated at the refinery and railed or piped back north to be used again.
Pourquoi ici: Alberta is landlocked. Pipeline capacity, not geology, is what has capped this industry's growth for two decades.
United States · US Midwest refineries détenu par Refiner (Affineur)
Refined into fuel
Midwest refineries were rebuilt specifically to run this heavy Canadian barrel, which is why it trades at a discount to lighter crude but has a dependable home.
Pourquoi ici: A refinery configured for heavy crude cannot easily switch to light, and vice versa. Refineries and crude grades marry each other for decades.
Il s'agit d'un exemple traité. Il suit une quantité de départ déclarée à travers des rendements et des taux de récupération typiques publiés, de sorte que les proportions sont vérifiables ; ce n'est pas le relevé d'un envoi spécifique. Les données d'itinéraire — quels pays, quels procédés, et pourquoi le matériau ne peut simplement pas être traité ailleurs — sont compilées à partir de sources publiques.