industry, override, viewlinktolatest, wysiwyg
1,729
edits
Monitoring and reducing methane emissions: Difference between revisions
Monitoring and reducing methane emissions (view source)
Revision as of 18:44, 30 September 2015
, 30 September 2015no edit summary
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
<parsererror style="display: block; white-space: pre; border: 2px solid #c77; padding: 0 1em 0 1em; margin: 1em; background-color: #fdd; color: black"> | <parsererror style="display: block; white-space: pre; border: 2px solid #c77; padding: 0 1em 0 1em; margin: 1em; background-color: #fdd; color: black"> | ||
=== This page contains the following errors: === | === This page contains the following errors: === | ||
<div style="font-family:monospace;font-size:12px">error on line 1 at column | <div style="font-family:monospace;font-size:12px">error on line 1 at column 4849: Unescaped '<' not allowed in attributes values </div> | ||
=== Below is a rendering of the page up to the first error. === | === Below is a rendering of the page up to the first error. === | ||
</parsererror> | </parsererror> | ||
| Line 12: | Line 12: | ||
EPA reports show that nearly 29% of all methane emissions in 2012 came from E&P activity<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>. Natural gas is the largest methane source, followed by enteric fermentation--the digestive process of grazing animals that produces methane as a gassy byproduct--<span style="line-height: 20.8px;">at 25%</span><span style="line-height: 1.6;">. Grazing animals also produce manure, which is responsible for an added 9% of methane emitted.</span> | EPA reports show that nearly 29% of all methane emissions in 2012 came from E&P activity<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>. Natural gas is the largest methane source, followed by enteric fermentation--the digestive process of grazing animals that produces methane as a gassy byproduct--<span style="line-height: 20.8px;">at 25%</span><span style="line-height: 1.6;">. Grazing animals also produce manure, which is responsible for an added 9% of methane emitted.</span> | ||
With direct measurements of emissions from devices on 377 wells operated by 10 companies cooperating on the survey, Allen gathered data that changed the EPA’s pie chart of E&P emissions of methane. Allen concluded that emissions during flowback have sharply dropped from 26% to <span style="line-height: 20.8px;">1%</span><span style="line-height: 1.6;"> in the EPA’s Greenhouse Gas Inventory. The decline, in addition larger-than-expected emissions by gas-powered pneumatic control devices, pushed its share of natural gas emissions from the EPA estimate of 26% to a steep 42%, making it the largest single category.</span> | With direct measurements of emissions from devices on 377 wells operated by 10 companies cooperating on the survey, Dave Allen, a chemical engineering professor at the University of Texas at Austin, gathered data that changed the EPA’s pie chart of E&P emissions of methane. Allen concluded that emissions during flowback have sharply dropped from 26% to <span style="line-height: 20.8px;">1%</span><span style="line-height: 1.6;"> in the EPA’s Greenhouse Gas Inventory. The decline, in addition larger-than-expected emissions by gas-powered pneumatic control devices, pushed its share of natural gas emissions from the EPA estimate of 26% to a steep 42%, making it the largest single category.</span> | ||