期刊
GEOPHYSICAL RESEARCH LETTERS
卷 43, 期 5, 页码 2283-2290出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2015GL067623
关键词
abandoned wells; emissions; methane
资金
- Environmental Defense Fund (EDF)
- National Science Foundation [1229114]
- Fiona and Stan Druckenmiller
- Heising-Simons Foundation
- Bill and Susan Oberndorf
- Betsy and Sam Reeves
- Robertson Foundation
- Tom Steyer
- Kat Taylor
- Walton Family Foundation
- Division Of Earth Sciences
- Directorate For Geosciences [1229114] Funding Source: National Science Foundation
Recent work indicates that oil and gas methane (CH4) inventories for the United States are underestimated. Here we present results from direct measurements of CH4 emissions from 138 abandoned oil and gas wells, a source currently missing from inventories. Most abandoned wells do not emit CH4, but 6.5% of wells had measurable CH4 emissions. Twenty-five percent of wells we visited that had not been plugged emitted>5gCH(4)h(-1). Stable isotopes indicate that wells emit natural gas and/or coalbed CH4. We estimate that abandoned wells make a small contribution (<1%) to regional CH4 emissions in our study areas. Additional data are needed to accurately determine the contribution of abandoned wells to national CH4 budgets, particularly measurements in other basins and better characterization of the abundance and regional distribution of high emitters.
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