Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.2001904117 |
Evidence for massive emission of methane from a deep‐water gas field during the Pliocene | |
Martino Foschi; Joseph A. Cartwright; Christopher W. MacMinn; Giuseppe Etiope | |
2020-10-26 | |
发表期刊 | Proceedings of the National Academy of Science |
出版年 | 2020 |
英文摘要 | Geologic hydrocarbon seepage is considered to be the dominant natural source of atmospheric methane in terrestrial and shallow‐water areas; in deep‐water areas, in contrast, hydrocarbon seepage is expected to have no atmospheric impact because the gas is typically consumed throughout the water column. Here, we present evidence for a sudden expulsion of a reservoir‐size quantity of methane from a deep‐water seep during the Pliocene, resulting from natural reservoir overpressure. Combining three-dimensional seismic data, borehole data and fluid‐flow modeling, we estimate that 18–27 of the 23–31 Tg of methane released at the seafloor could have reached the atmosphere over 39–241 days. This emission is ∼10% and ∼28% of present‐day, annual natural and petroleum‐industry methane emissions, respectively. While no such ultraseepage events have been documented in modern times and their frequency is unknown, seismic data suggest they were not rare in the past and may potentially occur at present in critically pressurized reservoirs. This neglected phenomenon can influence decadal changes in atmospheric methane. |
领域 | 地球科学 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/301943 |
专题 | 地球科学 |
推荐引用方式 GB/T 7714 | Martino Foschi,Joseph A. Cartwright,Christopher W. MacMinn,等. Evidence for massive emission of methane from a deep‐water gas field during the Pliocene[J]. Proceedings of the National Academy of Science,2020. |
APA | Martino Foschi,Joseph A. Cartwright,Christopher W. MacMinn,&Giuseppe Etiope.(2020).Evidence for massive emission of methane from a deep‐water gas field during the Pliocene.Proceedings of the National Academy of Science. |
MLA | Martino Foschi,et al."Evidence for massive emission of methane from a deep‐water gas field during the Pliocene".Proceedings of the National Academy of Science (2020). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论