With the decline of conventional crude oil production, heavy oil exploitation become more and more important.

随着常规原油产量的递减，稠油开采对缓解能源供求紧张意义重大。

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They estimated that worldwide conventional crude oil production will peak in 2014, years earlier than anticipated.

科学家预计全球常规原油产量将于2014年达到峰值，比之前预计的要早很多年。

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In a finding that may speed efforts to conserve oil, scientists in Kuwait predict that world conventional crude oil production will peak in 2014.

科威特科学家预测世界常规原油产量将在2014年达到峰值，这一发现可能会促进储存石油的努力。

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The characteristics of diluted oil sands crude, such as that which would be transported by Keystone XL, are similar to conventional crude oil.

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As traditional oil fields yield less and less, major producers are looking for crude in less conventional places, from oil sands and shale plays to ultra deepwater.

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Iraq sits atop the world's fourth largest reserves of conventional crude, or about 143 billion barrels, and oil revenues make up 95 percent of the state budget.

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