Comparison of methane emission estimates from multiple measurement techniques at natural gas production pads
Abstract
This study presents the results of a campaign that estimated methane emissions at 268 gas production facilities in the Fayetteville shale gas play using onsite measurements (261 facilities) and two downwind methods - the dual tracer flux ratio method (Tracer Facility Estimate - TFE, 17 facilities) and the EPA Other Test Method 33a (OTM33A Facility Estimate - OFE, 50 facilities). A study onsite estimate (SOE) for each facility was developed by combining direct measurements and simulation of unmeasured emission sources, using operator activity data and emission data from literature. The SOE spans 0-403 kg/h and simulated methane emissions from liquid unloadings account for 88% of total emissions estimated by the SOE, with 76% (95% CI [51%-92%]) contributed by liquid unloading at two facilities. TFE and SOE show overlapping 95% CI between individual estimates at 15 of 16 (94%) facilities where the measurements were paired, while OFE and SOE show overlapping 95% CI between individual estimates at 28 of 43 (65%) facilities. However, variance-weighted least-squares (VWLS) regressions performed on sets of paired estimates indicate statistically significant differences between methods. The SOE represents a lower bound of emissions at facilities where onsite direct measurements of continuously emitting sources are the primary contributormore »
- Authors:
-
- Colorado State Univ., Fort Collins, CO (United States). Energy Inst. and Mechanical Engineering
- Aerodyne Research, Inc., Billerica, MA (United States)
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- National Oceanic and Atmospheric Administration (NOAA), Boulder, CO (United States). Earth System Research Lab.; Univ. of Colorado, Boulder, CO (United States). Cooperative Inst. for Research in Environmental Sciences (CIRES)
- Univ. of Wyoming, Laramie, WY (United States). Dept. of Atmospheric Science
- Publication Date:
- Research Org.:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE); National Oceanic and Atmospheric Administration (NOAA); Colorado Energy Research Collaboratory
- OSTI Identifier:
- 1418123
- Report Number(s):
- NREL/JA-6A20-70835
Journal ID: ISSN 2325-1026
- Grant/Contract Number:
- AC36-08GO28308; AC26-07NT42677
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Elementa
- Additional Journal Information:
- Journal Volume: 5; Journal Issue: 0; Journal ID: ISSN 2325-1026
- Publisher:
- University of California Press
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 03 NATURAL GAS; 54 ENVIRONMENTAL SCIENCES; Climate change; Natural gas; Methane; Emissions
Citation Formats
Bell, Clay Samuel, Vaughn, Timothy L., Zimmerle, Daniel, Herndon, Scott C., Yacovitch, Tara I., Heath, Garvin A., Pétron, Gabrielle, Edie, Rachel, Field, Robert A., Murphy, Shane M., Robertson, Anna M., and Soltis, Jeffrey. Comparison of methane emission estimates from multiple measurement techniques at natural gas production pads. United States: N. p., 2017.
Web. doi:10.1525/elementa.266.
Bell, Clay Samuel, Vaughn, Timothy L., Zimmerle, Daniel, Herndon, Scott C., Yacovitch, Tara I., Heath, Garvin A., Pétron, Gabrielle, Edie, Rachel, Field, Robert A., Murphy, Shane M., Robertson, Anna M., & Soltis, Jeffrey. Comparison of methane emission estimates from multiple measurement techniques at natural gas production pads. United States. https://doi.org/10.1525/elementa.266
Bell, Clay Samuel, Vaughn, Timothy L., Zimmerle, Daniel, Herndon, Scott C., Yacovitch, Tara I., Heath, Garvin A., Pétron, Gabrielle, Edie, Rachel, Field, Robert A., Murphy, Shane M., Robertson, Anna M., and Soltis, Jeffrey. Thu .
"Comparison of methane emission estimates from multiple measurement techniques at natural gas production pads". United States. https://doi.org/10.1525/elementa.266. https://www.osti.gov/servlets/purl/1418123.
@article{osti_1418123,
title = {Comparison of methane emission estimates from multiple measurement techniques at natural gas production pads},
author = {Bell, Clay Samuel and Vaughn, Timothy L. and Zimmerle, Daniel and Herndon, Scott C. and Yacovitch, Tara I. and Heath, Garvin A. and Pétron, Gabrielle and Edie, Rachel and Field, Robert A. and Murphy, Shane M. and Robertson, Anna M. and Soltis, Jeffrey},
abstractNote = {This study presents the results of a campaign that estimated methane emissions at 268 gas production facilities in the Fayetteville shale gas play using onsite measurements (261 facilities) and two downwind methods - the dual tracer flux ratio method (Tracer Facility Estimate - TFE, 17 facilities) and the EPA Other Test Method 33a (OTM33A Facility Estimate - OFE, 50 facilities). A study onsite estimate (SOE) for each facility was developed by combining direct measurements and simulation of unmeasured emission sources, using operator activity data and emission data from literature. The SOE spans 0-403 kg/h and simulated methane emissions from liquid unloadings account for 88% of total emissions estimated by the SOE, with 76% (95% CI [51%-92%]) contributed by liquid unloading at two facilities. TFE and SOE show overlapping 95% CI between individual estimates at 15 of 16 (94%) facilities where the measurements were paired, while OFE and SOE show overlapping 95% CI between individual estimates at 28 of 43 (65%) facilities. However, variance-weighted least-squares (VWLS) regressions performed on sets of paired estimates indicate statistically significant differences between methods. The SOE represents a lower bound of emissions at facilities where onsite direct measurements of continuously emitting sources are the primary contributor to the SOE, a sub-selection of facilities which minimizes expected inter-method differences for intermittent pneumatic controllers and the impact of episodically-emitting unloadings. At 9 such facilities, VWLS indicates that TFE estimates systematically higher emissions than SOE (TFE-to-SOE ratio = 1.6, 95% CI [1.2 to 2.1]). At 20 such facilities, VWLS indicates that OFE estimates systematically lower emissions than SOE (OFE-to-SOE ratio of 0.41 [0.26 to 0.90]). Given that SOE at these facilities is a lower limit on emissions, these results indicate that OFE is likely a less accurate method than SOE or TFE for this type of facility.},
doi = {10.1525/elementa.266},
journal = {Elementa},
number = 0,
volume = 5,
place = {United States},
year = {Thu Feb 09 00:00:00 EST 2017},
month = {Thu Feb 09 00:00:00 EST 2017}
}
Web of Science
Works referenced in this record:
Methane emissions from natural gas production and use: reconciling bottom-up and top-down measurements
journal, August 2014
- Allen, David T.
- Current Opinion in Chemical Engineering, Vol. 5
Methane Emissions from Process Equipment at Natural Gas Production Sites in the United States: Pneumatic Controllers
journal, December 2014
- Allen, David T.; Pacsi, Adam P.; Sullivan, David W.
- Environmental Science & Technology, Vol. 49, Issue 1
Methane Emissions from Process Equipment at Natural Gas Production Sites in the United States: Liquid Unloadings
journal, December 2014
- Allen, David T.; Sullivan, David W.; Zavala-Araiza, Daniel
- Environmental Science & Technology, Vol. 49, Issue 1
Measurements of methane emissions at natural gas production sites in the United States
journal, September 2013
- Allen, D. T.; Torres, V. M.; Thomas, J.
- Proceedings of the National Academy of Sciences, Vol. 110, Issue 44
Possible malfunction in widely used methane sampler deserves attention but poses limited implications for supply chain emission estimates
journal, December 2016
- Alvarez, Ramón A.; Lyon, David R.; Marchese, Anthony J.
- Elementa: Science of the Anthropocene, Vol. 4
Greater focus needed on methane leakage from natural gas infrastructure
journal, April 2012
- Alvarez, R. A.; Pacala, S. W.; Winebrake, J. J.
- Proceedings of the National Academy of Sciences, Vol. 109, Issue 17
Methane Leaks from North American Natural Gas Systems
journal, February 2014
- Brandt, A. R.; Heath, G. A.; Kort, E. A.
- Science, Vol. 343, Issue 6172
Assessment of Methane Emissions from Oil and Gas Production Pads using Mobile Measurements
journal, November 2014
- Brantley, Halley L.; Thoma, Eben D.; Squier, William C.
- Environmental Science & Technology, Vol. 48, Issue 24
Toward a better understanding and quantification of methane emissions from shale gas development
journal, April 2014
- Caulton, D. R.; Shepson, P. B.; Santoro, R. L.
- Proceedings of the National Academy of Sciences, Vol. 111, Issue 17
Using Multi-Scale Measurements to Improve Methane Emission Estimates from Oil and Gas Operations in the Barnett Shale Region, Texas
journal, June 2015
- Harriss, Robert; Alvarez, Ramón A.; Lyon, David
- Environmental Science & Technology, Vol. 49, Issue 13
University of Texas study underestimates national methane emissions at natural gas production sites due to instrument sensor failure
journal, August 2015
- Howard, Touché
- Energy Science & Engineering, Vol. 3, Issue 5
Methane Emissions from Leak and Loss Audits of Natural Gas Compressor Stations and Storage Facilities
journal, June 2015
- Johnson, Derek R.; Covington, April N.; Clark, Nigel N.
- Environmental Science & Technology, Vol. 49, Issue 13
Aircraft-Based Estimate of Total Methane Emissions from the Barnett Shale Region
journal, June 2015
- Karion, Anna; Sweeney, Colm; Kort, Eric A.
- Environmental Science & Technology, Vol. 49, Issue 13
Direct Measurements Show Decreasing Methane Emissions from Natural Gas Local Distribution Systems in the United States
journal, March 2015
- Lamb, Brian K.; Edburg, Steven L.; Ferrara, Thomas W.
- Environmental Science & Technology, Vol. 49, Issue 8
Development of Atmospheric Tracer Methods To Measure Methane Emissions from Natural Gas Facilities and Urban Areas
journal, June 1995
- Lamb, Brian K.; McManus, J. B.; Shorter, Joanne H.
- Environmental Science & Technology, Vol. 29, Issue 6
Characterizing Fugitive Methane Emissions in the Barnett Shale Area Using a Mobile Laboratory
journal, June 2015
- Lan, Xin; Talbot, Robert; Laine, Patrick
- Environmental Science & Technology, Vol. 49, Issue 13
Aircraft-Based Measurements of Point Source Methane Emissions in the Barnett Shale Basin
journal, June 2015
- Lavoie, Tegan N.; Shepson, Paul B.; Cambaliza, Maria O. L.
- Environmental Science & Technology, Vol. 49, Issue 13
Aerial Surveys of Elevated Hydrocarbon Emissions from Oil and Gas Production Sites
journal, April 2016
- Lyon, David R.; Alvarez, Ramón A.; Zavala-Araiza, Daniel
- Environmental Science & Technology, Vol. 50, Issue 9
Constructing a Spatially Resolved Methane Emission Inventory for the Barnett Shale Region
journal, June 2015
- Lyon, David R.; Zavala-Araiza, Daniel; Alvarez, Ramón A.
- Environmental Science & Technology, Vol. 49, Issue 13
Anthropogenic emissions of methane in the United States
journal, November 2013
- Miller, S. M.; Wofsy, S. C.; Michalak, A. M.
- Proceedings of the National Academy of Sciences, Vol. 110, Issue 50
Measurements of Methane Emissions from Natural Gas Gathering Facilities and Processing Plants: Measurement Results
journal, February 2015
- Mitchell, Austin L.; Tkacik, Daniel S.; Roscioli, Joseph R.
- Environmental Science & Technology, Vol. 49, Issue 5
Near-Field Characterization of Methane Emission Variability from a Compressor Station Using a Model Aircraft
journal, May 2015
- Nathan, Brian J.; Golston, Levi M.; O’Brien, Anthony S.
- Environmental Science & Technology, Vol. 49, Issue 13
An accurate and straightforward approach to line regression analysis of error-affected experimental data
journal, April 1989
- Neri, F.; Saitta, G.; Chiofalo, S.
- Journal of Physics E: Scientific Instruments, Vol. 22, Issue 4
A new look at methane and nonmethane hydrocarbon emissions from oil and natural gas operations in the Colorado Denver-Julesburg Basin: Hydrocarbon emissions in oil & gas basin
journal, June 2014
- Pétron, Gabrielle; Karion, Anna; Sweeney, Colm
- Journal of Geophysical Research: Atmospheres, Vol. 119, Issue 11
Measuring Emissions from Oil and Natural Gas Well Pads Using the Mobile Flux Plane Technique
journal, March 2015
- Rella, Chris W.; Tsai, Tracy R.; Botkin, Connor G.
- Environmental Science & Technology, Vol. 49, Issue 7
Variation in Methane Emission Rates from Well Pads in Four Oil and Gas Basins with Contrasting Production Volumes and Compositions
journal, July 2017
- Robertson, Anna M.; Edie, Rachel; Snare, Dustin
- Environmental Science & Technology, Vol. 51, Issue 15
Measurements of methane emissions from natural gas gathering facilities and processing plants: measurement methods
journal, January 2015
- Roscioli, J. R.; Yacovitch, T. I.; Floerchinger, C.
- Atmospheric Measurement Techniques, Vol. 8, Issue 5
Methane Emissions from Natural Gas Compressor Stations in the Transmission and Storage Sector: Measurements and Comparisons with the EPA Greenhouse Gas Reporting Program Protocol
journal, February 2015
- Subramanian, R.; Williams, Laurie L.; Vaughn, Timothy L.
- Environmental Science & Technology, Vol. 49, Issue 5
Integrating Source Apportionment Tracers into a Bottom-up Inventory of Methane Emissions in the Barnett Shale Hydraulic Fracturing Region
journal, June 2015
- Townsend-Small, Amy; Marrero, Josette E.; Lyon, David R.
- Environmental Science & Technology, Vol. 49, Issue 13
Natural gas facility methane emissions: measurements by tracer flux ratio in two US natural gas producing basins
journal, February 2017
- Yacovitch, Tara I.; Daube, Conner; Vaughn, Timothy L.
- Elem Sci Anth, Vol. 5, Issue 0
Mobile Laboratory Observations of Methane Emissions in the Barnett Shale Region
journal, March 2015
- Yacovitch, Tara I.; Herndon, Scott C.; Pétron, Gabrielle
- Environmental Science & Technology, Vol. 49, Issue 13
Toward a Functional Definition of Methane Super-Emitters: Application to Natural Gas Production Sites
journal, June 2015
- Zavala-Araiza, Daniel; Lyon, David; Alvarez, Ramón A.
- Environmental Science & Technology, Vol. 49, Issue 13
Reconciling divergent estimates of oil and gas methane emissions
journal, December 2015
- Zavala-Araiza, Daniel; Lyon, David R.; Alvarez, Ramón A.
- Proceedings of the National Academy of Sciences
Methane emissions from natural gas production and use: reconciling bottom-up and top-down measurements
journal, August 2014
- Allen, David T.
- Current Opinion in Chemical Engineering, Vol. 5
Natural gas facility methane emissions: measurements by tracer flux ratio in two US natural gas producing basins
journal, February 2017
- Yacovitch, Tara I.; Daube, Conner; Vaughn, Timothy L.
- Elem Sci Anth, Vol. 5, Issue 0
Works referencing / citing this record:
A review of close-range and screening technologies for mitigating fugitive methane emissions in upstream oil and gas
journal, April 2019
- Fox, Thomas A.; Barchyn, Thomas E.; Risk, David
- Environmental Research Letters, Vol. 14, Issue 5
Temporal variability largely explains top-down/bottom-up difference in methane emission estimates from a natural gas production region
journal, October 2018
- Vaughn, Timothy L.; Bell, Clay S.; Pickering, Cody K.
- Proceedings of the National Academy of Sciences, Vol. 115, Issue 46
Constraining the accuracy of flux estimates using OTM 33A
journal, January 2020
- Edie, Rachel; Robertson, Anna M.; Field, Robert A.
- Atmospheric Measurement Techniques, Vol. 13, Issue 1
Cavity Ring-Down Methane Sensor for Small Unmanned Aerial Systems
journal, January 2020
- Martinez, Benjamin; Miller, Thomas W.; Yalin, Azer P.
- Sensors, Vol. 20, Issue 2