Methane Emissions From Unplugged Abandoned Oil and Gas Wells in Louisiana, USA

Document Type

Article

Publication Date

8-16-2025

Abstract

Methane emissions from abandoned oil and gas wells are not comprehensively addressed in the global methane budget. Current emission projections scale from estimates with small sample sizes and limited geographic diversity. This is the first study to report methane emissions from unplugged abandoned wells (n = 132) in Northern Louisiana. Calculated flow rates are compared with the emission factors utilized in the EPA Greenhouse Gas Inventory and used to investigate associated factors. Results show a right-tailed distribution driven by a few high emitters. Values range from 0 to 1,368 g hr−1 with a 57.4 g hr−1 mean, suggesting that current projections for the region are underestimated. Well age, date of last production, and product type could be associated with differences in observed methane flow rates. Increased sample size and geographic diversity will further improve emission estimates and allow for a better understanding of the underlying factors impacting methane emissions from these wells.

Publication Source (Journal or Book title)

Journal of Geophysical Research Atmospheres

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