Methane emissions from contrasting production regions within Alberta, Canada: Implications under incoming federal methane regulations
Aggressive reductions of oil and gas sector methane, a potent greenhouse gas, have been proposed in Canada. Few large-scale measurement studies have been conducted to confirm a baseline. This study used a vehicle-based gas monitoring system to measure fugitive and vented gas emissions across Lloydmi...
Published in: | Elementa: Science of the Anthropocene |
---|---|
Main Authors: | , , , , , , , |
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
University of California Press
2019
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1525/elementa.341 http://online.ucpress.edu/elementa/article-pdf/doi/10.1525/elementa.341/434648/341-5881-2-pb.pdf |
id |
crunicaliforniap:10.1525/elementa.341 |
---|---|
record_format |
openpolar |
spelling |
crunicaliforniap:10.1525/elementa.341 2024-06-23T07:56:01+00:00 Methane emissions from contrasting production regions within Alberta, Canada: Implications under incoming federal methane regulations O’Connell, Elizabeth Risk, David Atherton, Emmaline Bourlon, Evelise Fougère, Chelsea Baillie, Jennifer Lowry, David Johnson, Jacob Helmig, Detlev Lamb, Brian 2019 http://dx.doi.org/10.1525/elementa.341 http://online.ucpress.edu/elementa/article-pdf/doi/10.1525/elementa.341/434648/341-5881-2-pb.pdf en eng University of California Press http://creativecommons.org/licenses/by/4.0/ Elementa: Science of the Anthropocene volume 7 ISSN 2325-1026 journal-article 2019 crunicaliforniap https://doi.org/10.1525/elementa.341 2024-06-06T04:18:57Z Aggressive reductions of oil and gas sector methane, a potent greenhouse gas, have been proposed in Canada. Few large-scale measurement studies have been conducted to confirm a baseline. This study used a vehicle-based gas monitoring system to measure fugitive and vented gas emissions across Lloydminster (heavy oil), Peace River (heavy oil/bitumen), and Medicine Hat (conventional gas) developments in Alberta, Canada. Four gases (CO2, CH4, H2S, C2H6), and isotopic δ13CCH4 were recorded in real-time at 1 Hz over a six-week field campaign. We sampled 1,299 well pads, containing 2,670 unique wells and facilities, in triplicate. Geochemical emission signatures of fossil fuel-sourced plumes were identified and attributed to nearby, upwind oil and gas well pads, and a point-source gaussian plume dispersion model was used to quantify emissions rates. Our analysis focused exclusively on well pads where emissions were detected >50% of the time when sampled downwind. Emission occurrences and rates were highest in Lloydminster, where 40.8% of sampled well pads were estimated to be emitting methane-rich gas above our minimum detection limits (m = 9.73 m3d–1). Of the well pads we found to be persistently emitting in Lloydminster, an estimated 40.2% (95% CI: 32.2%–49.4%) emitted above the venting threshold in which emissions mitigation under federal regulations would be required. As a result of measured emissions being larger than those reported in government inventories, this study suggests government estimates of infrastructure affected by incoming regulations may be conservative. Comparing emission intensities with available Canadian-based research suggests good general agreement between studies, regardless of the measurement methodology used for detection and quantification. This study also demonstrates the effectiveness in applying a gaussian dispersion model to continuous mobile-sourced emissions data as a first-order leak detection and repair screening methodology for meeting regulatory compliance. Article in Journal/Newspaper Peace River University of California Press Canada Elementa: Science of the Anthropocene 7 |
institution |
Open Polar |
collection |
University of California Press |
op_collection_id |
crunicaliforniap |
language |
English |
description |
Aggressive reductions of oil and gas sector methane, a potent greenhouse gas, have been proposed in Canada. Few large-scale measurement studies have been conducted to confirm a baseline. This study used a vehicle-based gas monitoring system to measure fugitive and vented gas emissions across Lloydminster (heavy oil), Peace River (heavy oil/bitumen), and Medicine Hat (conventional gas) developments in Alberta, Canada. Four gases (CO2, CH4, H2S, C2H6), and isotopic δ13CCH4 were recorded in real-time at 1 Hz over a six-week field campaign. We sampled 1,299 well pads, containing 2,670 unique wells and facilities, in triplicate. Geochemical emission signatures of fossil fuel-sourced plumes were identified and attributed to nearby, upwind oil and gas well pads, and a point-source gaussian plume dispersion model was used to quantify emissions rates. Our analysis focused exclusively on well pads where emissions were detected >50% of the time when sampled downwind. Emission occurrences and rates were highest in Lloydminster, where 40.8% of sampled well pads were estimated to be emitting methane-rich gas above our minimum detection limits (m = 9.73 m3d–1). Of the well pads we found to be persistently emitting in Lloydminster, an estimated 40.2% (95% CI: 32.2%–49.4%) emitted above the venting threshold in which emissions mitigation under federal regulations would be required. As a result of measured emissions being larger than those reported in government inventories, this study suggests government estimates of infrastructure affected by incoming regulations may be conservative. Comparing emission intensities with available Canadian-based research suggests good general agreement between studies, regardless of the measurement methodology used for detection and quantification. This study also demonstrates the effectiveness in applying a gaussian dispersion model to continuous mobile-sourced emissions data as a first-order leak detection and repair screening methodology for meeting regulatory compliance. |
author2 |
Helmig, Detlev Lamb, Brian |
format |
Article in Journal/Newspaper |
author |
O’Connell, Elizabeth Risk, David Atherton, Emmaline Bourlon, Evelise Fougère, Chelsea Baillie, Jennifer Lowry, David Johnson, Jacob |
spellingShingle |
O’Connell, Elizabeth Risk, David Atherton, Emmaline Bourlon, Evelise Fougère, Chelsea Baillie, Jennifer Lowry, David Johnson, Jacob Methane emissions from contrasting production regions within Alberta, Canada: Implications under incoming federal methane regulations |
author_facet |
O’Connell, Elizabeth Risk, David Atherton, Emmaline Bourlon, Evelise Fougère, Chelsea Baillie, Jennifer Lowry, David Johnson, Jacob |
author_sort |
O’Connell, Elizabeth |
title |
Methane emissions from contrasting production regions within Alberta, Canada: Implications under incoming federal methane regulations |
title_short |
Methane emissions from contrasting production regions within Alberta, Canada: Implications under incoming federal methane regulations |
title_full |
Methane emissions from contrasting production regions within Alberta, Canada: Implications under incoming federal methane regulations |
title_fullStr |
Methane emissions from contrasting production regions within Alberta, Canada: Implications under incoming federal methane regulations |
title_full_unstemmed |
Methane emissions from contrasting production regions within Alberta, Canada: Implications under incoming federal methane regulations |
title_sort |
methane emissions from contrasting production regions within alberta, canada: implications under incoming federal methane regulations |
publisher |
University of California Press |
publishDate |
2019 |
url |
http://dx.doi.org/10.1525/elementa.341 http://online.ucpress.edu/elementa/article-pdf/doi/10.1525/elementa.341/434648/341-5881-2-pb.pdf |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Peace River |
genre_facet |
Peace River |
op_source |
Elementa: Science of the Anthropocene volume 7 ISSN 2325-1026 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1525/elementa.341 |
container_title |
Elementa: Science of the Anthropocene |
container_volume |
7 |
_version_ |
1802648852022427648 |