वास्तव में क्या चल रहा है
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.
- सामग्री
- Oil Sands & Bitumen
- प्रकार
- Bitumen in sand, roughly 8° API, 10–12% bitumen by weight
- यह कहाँ से शुरू होती है
- Canada — The Athabasca deposit, northern Alberta
चरण दर चरण, और सीमा दर सीमा
Canada · Athabasca, Alberta द्वारा धारित Oil sands operators (खनिक)
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.
यहाँ क्यों: Shallow deposits only. Where the bitumen is too deep to mine, steam is injected instead and it is produced through wells.
Canada · Extraction plant द्वारा धारित Oil sands operators (खनिक)
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.
शेष का क्या हुआ: 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.
यहाँ क्यों: 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 द्वारा धारित Operators and midstream companies (शोधनकर्ता)
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.
शेष का क्या हुआ: Upgrading rejects carbon as petroleum coke — millions of tonnes of it are stockpiled in Alberta because there is no local market.
यहाँ क्यों: 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 द्वारा धारित Pipeline operators (व्यापारी)
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.
यहाँ क्यों: Alberta is landlocked. Pipeline capacity, not geology, is what has capped this industry's growth for two decades.
United States · US Midwest refineries द्वारा धारित Refiner (शोधनकर्ता)
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.
यहाँ क्यों: A refinery configured for heavy crude cannot easily switch to light, and vice versa. Refineries and crude grades marry each other for decades.
यह एक कार्यसाधित उदाहरण है। यह एक घोषित आरंभिक मात्रा को प्रकाशित सामान्य उपज और पुनःप्राप्ति दरों के माध्यम से अनुसरण करता है, इसलिए अनुपात जाँचे जा सकते हैं; यह किसी विशिष्ट शिपमेंट का अभिलेख नहीं है। मार्ग संबंधी तथ्य — कौन-से देश, कौन-सी प्रक्रियाएँ, और क्यों सामग्री को कहीं और संभाला नहीं जा सकता — सार्वजनिक रिपोर्टिंग से संकलित हैं।