Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/ab6ae1 |
Repeated leak detection and repair surveys reduce methane emissions over scale of years | |
Ravikumar, Arvind P.1; Roda-Stuart, Daniel2,6; Liu, Ryan3,7; Bradley, Alexander3; Bergerson, Joule3; Nie, Yuhao2,4,5; Zhang, Siduo4,5; Bi, Xiaotao4,5; Brandt, Adam R.2 | |
2020-03-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS
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ISSN | 1748-9326 |
出版年 | 2020 |
卷号 | 15期号:3 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Canada |
英文摘要 | Reducing methane emissions from the oil and gas industry is a critical climate action policy tool in Canada and the US. Optical gas imaging-based leak detection and repair (LDAR) surveys are commonly used to address fugitive methane emissions or leaks. Despite widespread use, there is little empirical measurement of the effectiveness of LDAR programs at reducing long-term leakage, especially over the scale of months to years. In this study, we measure the effectiveness of LDAR surveys by quantifying emissions at 36 unconventional liquids-rich natural gas facilities in Alberta, Canada. A representative subset of these 36 facilities were visited twice by the same detection team: an initial survey and a post-repair re-survey occurring similar to 0.5-2 years after the initial survey. Overall, total emissions reduced by 44% after one LDAR survey, combining a reduction in fugitive emissions of 22% and vented emissions by 47%. Furthermore, >90% of the leaks found in the initial survey were not emitting in the re-survey, suggesting high repair effectiveness. However, fugitive emissions reduced by only 22% because of new leaks that occurred between the surveys. This indicates a need for frequent, effective, and low-cost LDAR surveys to target new leaks. The large reduction in vent emissions is associated with potentially stochastic changes to tank-related emissions, which contributed similar to 45% of all emissions. Our data suggest a key role for tank-specific abatement strategies as an effective way to reduce oil and gas methane emissions. Finally, mitigation policies will also benefit from more definitive classification of leaks and vents. |
英文关键词 | leak detection and repair methane emissions policy effectiveness emissions reductions |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000526748500001 |
WOS关键词 | GAS-PRODUCTION SITES ; OIL ; ALBERTA |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
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/279223 |
专题 | 气候变化 |
作者单位 | 1.Harrisburg Univ Sci & Technol, Dept Syst Engn, Harrisburg, PA 17101 USA; 2.Stanford Univ, Dept Energy Resources Engn, Stanford, CA 94305 USA; 3.Univ Calgary, Dept Chem & Petr Engn, Calgary, AB, Canada; 4.Univ British Columbia, Clean Energy Res Ctr, Vancouver, BC, Canada; 5.Univ British Columbia, Dept Chem & Biol Engn, Vancouver, BC, Canada; 6.Alphataraxia Management, Los Angeles, CA USA; 7.DXD Consulting Inc, Calgary, AB, Canada |
推荐引用方式 GB/T 7714 | Ravikumar, Arvind P.,Roda-Stuart, Daniel,Liu, Ryan,et al. Repeated leak detection and repair surveys reduce methane emissions over scale of years[J]. ENVIRONMENTAL RESEARCH LETTERS,2020,15(3). |
APA | Ravikumar, Arvind P..,Roda-Stuart, Daniel.,Liu, Ryan.,Bradley, Alexander.,Bergerson, Joule.,...&Brandt, Adam R..(2020).Repeated leak detection and repair surveys reduce methane emissions over scale of years.ENVIRONMENTAL RESEARCH LETTERS,15(3). |
MLA | Ravikumar, Arvind P.,et al."Repeated leak detection and repair surveys reduce methane emissions over scale of years".ENVIRONMENTAL RESEARCH LETTERS 15.3(2020). |
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