Index | Australia | UK | Europe | USA | Canada | Africa | Russia | China | Asia | South America
  Gas Accidents | Environment | Economics | Health | Politics | Citizen Journalism | About Us | Links | Contact Us

Index > Environment > United States of America > Methane emissions at natural gas production sites

Bookmark and Share

Halliburton Loophole

"Father of Fracking"
George Mitchell
concerns over environmental
impacts of fracking

History of Fracking
Only a new technology

USA Fracking Stories

A Texan tragedy

Gas injection may have triggered earthquakes in Texas

California Lags in Fracking Regulations

All In for California Water

Fracking in Michigan

Fracking in Michigan Potential Impact on Health, Environment, Economy

Hydraulic fracturing of Marcellus Shale

Methane Gas from Marcellus Shale Drilling

Marcellus Shale Gas Economics

Health impacts of Marcellus shale gas drilling

Pennsylvania Fracking

Fracking in Virginia

Lesson From Wyoming Fracking

Water Pollution from Fracking

Hydraulic Fracturing Poses Substantial Water Pollution Risks

Methane in drinking water wells

Abandoned gas wells leak

Natural Gas Leaks Discovered in Boston

Methane Leaks Under Streets of Boston

Methane leaks make fracking dirty

Fracking effects real estate values

Fracking stimulates earthquakes

Protecting Gas Pipelines From Earthquakes

Gas Pipeline Earthquake - Simulations

America's crumbling pipelines

Averting Pipeline Failures

Dangers to Underground Pipelines

Gas Pipelines Could Serve as Wireless Links

Government Action needed on a National Energy Policy

EPA Releases Update on Ongoing Hydraulic Fracturing Study

Solar Booster Shot for Natural Gas Power Plants

Natural Gas Pricing Reform to Facilitate Carbon Tax Policy

Investing in fracking

What Oil Prices Have in Store?

Methane Out, Carbon Dioxide In

Health impacts of Marcellus shale gas drilling

Professor Ingraffea

Anti-Fracking Billboard

Natural Gas Drilling

Threats to Biodiversity

Pronghorn Migration
hindered by gas development

Microbes in a Fracking Site

Protozoa May Hold Key to World Water Safety

Shale Gas Production

Research into the Fracking Controversy

Convert Methane Into Useful Chemicals

Methane Natural Gas Into Diesel

'Natural Gas' at the molecular level

Arctic Methane risks

Arctic Methane Seeps

Great Gas Hydrate Escape

Undersea Methane Seep Ecosystem

Methane in the Atmosphere of Early Earth

Methane Natural Gas Linked to Climate Change

Cutting Methane Pollutants Would Slow Sea Level Rise

California | Colorado | Dakota | Marcellus | Massachusetts | Michigan | New York |
Ohio | Pennsylvania | Texas | Utah | Virginia | Wyoming

Shale Gas


National Academy of Sciences of the United States of America

Measurements of methane emissions at natural gas production sites in the United States

This work reports direct measurements of methane emissions at 190 onshore natural gas sites in the United States.

The measurements indicate that well completion emissions are lower than previously estimated; the data also show emissions from pneumatic controllers and equipment leaks are higher than Environmental Protection Agency (EPA) national emission projections.

Estimates of total emissions are similar to the most recent EPA national inventory of methane emissions from natural gas production.

These measurements will help inform policymakers, researchers, and industry, providing information about some of the sources of methane emissions from the production of natural gas, and will better inform and advance national and international scientific and policy discussions with respect to natural gas development and use.

Abstract

Engineering estimates of methane emissions from natural gas production have led to varied projections of national emissions.

This work reports direct measurements of methane emissions at 190 onshore natural gas sites in the United States (150 production sites, 27 well completion flowbacks, 9 well unloadings, and 4 workovers).

For well completion flowbacks, which clear fractured wells of liquid to allow gas production, methane emissions ranged from 0.01 Mg to 17 Mg (mean = 1.7 Mg; 95% confidence bounds of 0.673.3 Mg), compared with an average of 81 Mg per event in the 2011 EPA national emission inventory from April 2013.

Emission factors for pneumatic pumps and controllers as well as equipment leaks were both comparable to and higher than estimates in the national inventory.

Overall, if emission factors from this work for completion flowbacks, equipment leaks, and pneumatic pumps and controllers are assumed to be representative of national populations and are used to estimate national emissions, total annual emissions from these source categories are calculated to be 957 Gg of methane (with sampling and measurement uncertainties estimated at 200 Gg).

The estimate for comparable source categories in the EPA national inventory is ∼1,200 Gg.

Additional measurements of unloadings and workovers are needed to produce national emission estimates for these source categories.

The 957 Gg in emissions for completion flowbacks, pneumatics, and equipment leaks, coupled with EPA national inventory estimates for other categories, leads to an estimated 2,300 Gg of methane emissions from natural gas production (0.42% of gross gas production).


David T. Allena,1,
Vincent M. Torresa,
James Thomasa,
David W. Sullivana,
Matthew Harrisonb,
Al Hendlerb,
Scott C. Herndonc,
Charles E. Kolbc,
Matthew P. Fraserd,
A. Daniel Hille,
Brian K. Lambf,
Jennifer Miskiminsg,
Robert F. Sawyerh, and
John H. Seinfeldi

Edited by Susan L. Brantley, Pennsylvania State University, University Park, PA, and approved August 19, 2013 (received for review March 20, 2013)

California | Colorado | Dakota | Marcellus | Massachusetts | Michigan | New York |
Ohio | Pennsylvania | Texas | Utah | Virginia | Wyoming

 

 

 

site search by freefind