The South Pars gas field is the largest natural gas field in the world and holds estimated reserves of 16 trillion cubic meters of recoverable gas.

南帕尔斯气田是世界最大的天然气田，并拥有16万亿立方米，可采天然气储量估计。

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Producers have boosted supplies and recoverable reserves in the United States by combining horizontal drilling with hydraulic fracturing, also called fracking, to produce gas from shale formations.

天然气生产者已经通过水平钻孔技术和水力破碎技术的结合从页岩结构中开采天然气，从而来增加天然气供应和可恢复储备。

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The US Geological Survey estimated in 2008 that the Arctic was likely to hold 30% of the world's recoverable, but yet to be discovered, gas and 13% of its oil.

美国地质调查局曾在2008年做出预测，北极很可能占有全球30%和13%可采而未被发现的石油和天然气。

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Indeed, it does appear at first glance that the kinds of shale deposits that contain recoverable gas and oil are very large.

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Recoverable gas reserves have been estimated anywhere between 35-65 trillion cubic feet.

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The Marcellus is the biggest natural gas field in the United States, containing more than 500 trillion cubic feet of recoverable gas and stretching across three states.

FORBES: Shell Brushes Off Alaska Setback With $5B Marcellus Buy