GSTDTAP  > 气候变化
DOI10.1088/1748-9326/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
ISSN1748-9326
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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