Fugitive Air Emissions and GHG

NETL efforts focus on reducing uncertainties with fugitive emissions factor calculations, and collection of field emissions data sets for natural gas operations.

Leads to improved ability to model long-term GHG effects:

  • Improved methodology for emissions factor
    • Lowering estimate uncertainty
  • Fugitive emissions field data for natural gas extraction focused on decreasing modeling uncertainties
    • Measurements across multiple operators, sites, and for different process components

 

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Marcellus Shale Natural Gas Extraction and Transport
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Large uncertainty in Gas Emissions per Well Completion between the U.S. Environmental Protection Agency and American Natural Gas Alliance Estimates Emission values for certain extraction and processing components of the shale gas life cycle significantly influence results of the greenhouse gas life cycle analysis, and have large uncertainty values that require better field data. Click for link to NETL Life Cycle Analysis

 

Problem:
Large uncertainty in emissions factor used for upstream greenhouse gas emissions

Solution:
NETL is developing a method for calculating shale gas greenhouse gas emissions factors that handles uncertainties and can be applied to various shale gas basins

 
Problem:
Limited number of high-quality field data sets representative of shale gas operations

Solution:
NETL is performing field measurements to evaluate both ambient (regional effects) and point-source (specific process component) air emissions, with a current focus in the Appalachian Basin

 
Problem:
NETL Greenhouse Gas Life Cycle Analysis model needs better information for production activities to reduce uncertainties in overall GHG emission estimates

Solution:
Updated emissions factors based on NETL methodology, and field data from Appalachian Basin monitoring, will reduce uncertainties in the NETL shale gas greenhouse gas life cycle assessment.
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