2012 Unconventional Resources

Reconciling top-down and bottom-up greenhouse gas and air pollutant emission estimates from unconventional gas development in the Denver-Julesburg Basin

Subcontractor: Colorado School of Mines

Principal Investigator: Dag Nummedal
Project Number Project Status
12122-95 Active
RPSEA Project Manager: Sandy McSurdy
Aerodyne Research, Inc.; Aecom; American Gas Association; CIRES (Cooperative Institute for Research in Environmental Science); Colorado State University; ENVIRON International Corporation; National Renewable Energy Laboratory (NREL); NOAA (National Oceanic and Atmospheric Administration); Scie
Period of Performance
Start Date End Date
August 28, 2014 September 30, 2016
Total Project Cost RPSEA Share Cost Share
$4,930,268.00 $3,219,268.00 $1,711,000.00
Project Objectives

The objective of the project is to provide the scientific and industrial communities with a tested, standardized research protocol for estimating methane emissions from onshore oil and gas systems in a given natural gas production basin anywhere in the continental US. This protocol shall include advancements in both bottom-up and top-down components, aiming to reconcile potential differences between results from the two approaches. Reconciliation is defined as reducing the gap observed in prior studies between inventories and measurements with the goal of achieving the closest agreement possible considering relevant uncertainty analysis for each approach.


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