Monitoring and reducing methane emissions: Difference between revisions

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Using direct measures of emissions from devices on 377 wells operated by 10 companies cooperating on the survey, Allen gathered data that reshaped the EPA’s pie chart of E&P emissions of methane. The study concluded that emissions during flowback have sharply dropped from 26% in the EPA’s Greenhouse Gas Inventory to 1%. That decline, plus larger-than-expected emissions by gas-powered pneumatic control devices, pushed its share of the natural gas emissions from the EPA estimate of 26% to 42%, making it the largest single category.
Using direct measures of emissions from devices on 377 wells operated by 10 companies cooperating on the survey, Allen gathered data that reshaped the EPA’s pie chart of E&P emissions of methane. The study concluded that emissions during flowback have sharply dropped from 26% in the EPA’s Greenhouse Gas Inventory to 1%. That decline, plus larger-than-expected emissions by gas-powered pneumatic control devices, pushed its share of the natural gas emissions from the EPA estimate of 26% to 42%, making it the largest single category.


[[File:Wellsite emissions graph.jpg|frame|576x305px|Two 2015 studies of wellsite emissions showed a rapid drop in methane emissions from water flowing back after fracturing, increasing the relative importance of emissions by well equipment.|link=http://petrowiki.org/File%3AWellsite_emissions_graph.jpg]]
[[File:Wellsite emissions graph.jpg|frame|576x305px|Two 2015 studies of wellsite emissions showed a rapid drop in methane emissions from water flowing back after fracturing, increasing the relative importance of emissions by well equipment.<ref name="r2">Rassenfoss, S. Pressure to Reduce Methane Emissions Highlights the Need for Better Monitoring. J Pet Tech 67 (3): 46-52. http://www.spe.org/jpt/article/8437-pressure-to-reduce-methane-emissions-highlights-the-need-for-better-monitoring/.</ref>|link=http://petrowiki.org/File%3AWellsite_emissions_graph.jpg]]


== Reducing methane emissions ==
== Reducing methane emissions ==
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