首页 > 资料下载 > 甲烷与页岩天然气的温室气体足迹Methane and the greenhouse-gas footprint of natural gas from shale formations
甲烷与页岩天然气的温室气体足迹Methane and the greenhouse-gas footprint of natural gas from shale formations 甲烷与页岩天然气的温室气体足迹Methane and the greenhouse-gas footprint of natural gas from shale formations

甲烷与页岩天然气的温室气体足迹Methane and the greenhouse-gas footprint of natural gas from shale formations

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  • 更新时间:2021-09-09
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我们评估了通过高排放量获得的天然气的温室气体足迹。 页岩地层的体积水力压裂,重点关注甲烷的排放。 天然气主要由甲烷组成,其中3.6%-7.9%的甲烷来自 页岩气生产在排放过程中泄漏到大气中 井时间。这些甲烷排放量至少比或许多30%。 比传统气体大两倍多。来自 页岩气在井水力压裂时发生-因为甲烷逸出 从回流流体-以及在压裂后钻出过程中。甲烷 是一种强大的温室气体,具有远大于全球变暖的潜力 比二氧化碳的排放量还要多,特别是在前几个时期 排放后几十年。甲烷对温室有很大贡献。 页岩气在较短时间尺度上的气体足迹,在20年内占主导地位 地平线。页岩气的足迹大于常规天然气或石油的足迹。 从任何时间范围来看,尤其是20多年来。相比于 煤,页岩气的占地面积至少比煤大20%,也许比煤大两倍。 在20年的时间里,它和过去100年相比,同样伟大。 甲烷·温室气体·全球变暖·天然气·页岩气·

We evaluate the greenhouse gas footprint of natural gas obtained by high- volume hydraulic fracturing from shale formations, focusing on methane emissions. Natural gas is composed largely of methane, and 3.6% to 7.9% of the methane from shale-gas production escapes to the atmosphere in venting and leaks over the life- time of a well. These methane emissions are at least 30% more than and perhaps more than twice as great as those from conventional gas. The higher emissions from shale gas occur at the time wells are hydraulically fractured—as methane escapes from flow-back return fluids—and during drill out following the fracturing. Methane is a powerful greenhouse gas, with a global warming potential that is far greater than that of carbon dioxide, particularly over the time horizon of the first few decades following emission. Methane contributes substantially to the greenhouse gas footprint of shale gas on shorter time scales, dominating it on a 20-year time horizon. The footprint for shale gas is greater than that for conventional gas or oil when viewed on any time horizon, but particularly so over 20 years. Compared to coal, the footprint of shale gas is at least 20% greater and perhaps more than twice as great on the 20-year horizon and is comparable when compared over 100 years. Keywords Methane ·Greenhouse gases ·Global warming ·Natural gas ·Shale gas ·

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