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,Output recovers: A worker operates equipment on a drilling rig near Midland, Texas. America’s shale oilfields are enjoying a resurgence that should push their production back to record levels in the next few weeks. — Reuters

AT a time when crude prices are close to their highest levels in 14 years, Big Oil is turning its back on some of its biggest reserves.

BP Plc this week announced it would sell out of the Sunrise project, a Canadian tar sands joint venture that produces about 50,000 barrels a day.

That can be chalked up as a victory for environmental campaigners who’ve sought to drive oil majors away from such projects.

Equinor ASA sold out of a similar Canadian project last year, while Shell Plc and ConocoPhillips sold assets several years ago. Chevron Corp and TotalEnergies SE also have projects that may be on the block.

On paper, bitumen and oil sands deposits like those in Canada’s Athabasca region are some of the biggest reserves of petroleum anywhere on the planet.

Venezuela’s Orinoco belt contains roughly the same amount of crude as Saudi Arabia. The Athabasca reserves come next.

Yet there’s always been an asterisk attached to the tar sands. While their reserves numbers seem enormous, their economics have always been dicey.

If international oil companies are quitting them now, it’s not because of any attempt to clean up their image (BP, for instance, is taking an offshore oil project as part-payment to its partner Cenovus Energy Inc for its Sunrise stake).

It’s because they can see through current high crude prices to a future where barrels are cheaper, and tar sands can no longer turn a reliable profit.

Such deposits aren’t quite like anything else in the oil industry. In many places, crude is extracted not via wells but with dump trucks and open-cast pits that resemble coal mines more than oil fields.

Elsewhere, the heavy viscous crude must be broken up with steam and chemicals to produce something liquid enough to be pumped to the surface.

That’s an energy-intensive process. Whereas conventional methods produce oil containing about 20 gigajoules of energy for every gigajoule used in extracting it from the ground, the type of tar sands found at Sunrise get just four or five gigajoules.

As the world of 2022 is well aware, energy is cost – and the expenditure needed to extract crude from the Canadian prairie is higher than anywhere else in the world.

When energy consultancies produce a rundown of the most competitive projects, it’s tar sands (along with still-more marginal ones such as coal-to-liquids or gas-to-liquids) that typically occupy the costliest bit of the curve. When prices dip, the producers at the top start losing money first.

That’s why the Gulf’s secure position at the bottom of the global cost curve has made it the linchpin of energy markets for half a century.

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     发布于 2022-06-28 09:18:42  回复
  • 在今夜的诺坎普,迎来了巴萨主帅生涯第一场失败。在开局阶段短暂占据优势的情况下,巴萨进攻只开花不结果,最终被贝蒂斯利用一次快速反击斩于马下。巴萨今夜的失败,很大程度上源于哈维的轻敌。很值得鼓励