The economic downturn is drying up demand for oil and natural gas, dropping the benchmark price for a barrel of oil to below $50.

经济低迷正在抑制市场对石油和天然气的需求，导致基准原油价格跌破每桶50美元。

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The amount of gas used means that a barrel of Californian heavy oil gives the stuff from Canada's tar sands a run for its money in terms of associated greenhouse-gas emissions.

根据相关的温室气体排放，天然气的耗费量意味着每桶加州重油竭尽全力从加拿大沥青砂岩中提取材料。

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The BRG-15 had conventional, gas operated action with rotating bolt, locking into the barrel extension.

该担心现有- 15接受传统，燃气经营与旋转螺栓行动，延长锁入桶。

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All this heating, plus refining bitumen into something approximating everyday petroleum, gobbles 1, 300 to 2, 100 cubic feet of natural gas per barrel of crude produced.

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Extracting the bitumen from the clay and sand and upgrading it into crude oil--by breaking its big hydrocarbon molecules into smaller, less viscous ones--is an expensive, energy-intensive process that consumes 650 cubic feet of natural gas for every barrel.

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Approximately 6, 000 cubic feet of natural gas is considered equivalent to one barrel of oil.

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