Fugitive Gas Migration in the Vadose Zone at an Experimental Field Site in the Montney Shale Gas Region

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dc.contributor.authorForde, Olenka N.
dc.contributor.authorCahill, Aaron G.
dc.contributor.authorMayer, Bernhard
dc.contributor.authorBeckie, Roger D.
dc.contributor.authorMayer, K. Ulrich
dc.date.accessioned2022-09-02T21:08:45Z
dc.date.available2022-09-02T21:08:45Z
dc.date.issued2022-01
dc.descriptionForde, O. N., Cahill, A. G., Mayer, B., Beckie, R. D., & Mayer, K. U. (2022). Fugitive gas migration in the vadose zone at an experimental field site in the Montney shale gas region. Geophysical Research Letters, 49, e2022GL098762. https://doi.org/10.1029/2022GL098762en_US
dc.description.abstractFugitive gas migration (GM) from compromised oil and gas wells remains a global concern. To understand environmental impacts from GM there is a need to characterize the transport and fate of fugitive gas in the vadose zone. We simulated subsurface wellbore leakage by injecting natural gas into thick unsaturated glacio-lacustrine deposits in a region of petroleum development in Western Canada. Methane and carbon dioxide effluxes were monitored and soil-gas samples were collected for molecular and stable carbon isotope analyses. A conceptual model was developed to demonstrate the physical and biogeochemical processes that control the spatial-temporal variability of GM. Methane oxidation partially attenuated natural gas; however, gas transport and fate were strongly influenced by variations in grain-size distribution and barometric pressure, resulting in episodic effluxes and lateral gas transport. To accurately detect, quantify and assess GM at oil and gas sites, adequate site characterization and continuous, spatially dense monitoring are necessary.en_US
dc.description.grantingagencyNatural Sciences and Engineering Research Council (NSERC)en_US
dc.description.grantingagencyUniversity of Calgary - Research Granten_US
dc.description.grantingagencyOtheren_US
dc.identifier.citationForde, O. N., Cahill, A. G., Mayer, B., Beckie, R. D., & Mayer, K. U. (2022). Fugitive Gas Migration in the Vadose Zone at an Experimental Field Site in the Montney Shale Gas Region. Geophysical Research Letters, 49(15), e2022GL098762. https://doi.org/10.1029/2022GL098762en_US
dc.identifier.doihttp://dx.doi.org/10.1029/2022GL098762en_US
dc.identifier.grantnumberaward CEI-MET-196Ben_US
dc.identifier.issn1944-8007
dc.identifier.urihttp://hdl.handle.net/1880/115156
dc.language.isoengen_US
dc.publisherWiley Subscription Services, Inc.en_US
dc.publisher.departmentGeoscienceen_US
dc.publisher.facultyScienceen_US
dc.publisher.hasversionpublishedVersionen_US
dc.publisher.institutionUniversity of Calgaryen_US
dc.publisher.policyhttps://www.agu.org/Publish-with-AGU/Publish/Author-Resources/Policies/Permission-policyen_US
dc.rightsUnless otherwise indicated, this material is protected by copyright and has been made available with authorization from the copyright owner. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.en_US
dc.subjectBarometricā€pressure changesen_US
dc.subjectEffluxesen_US
dc.subjectFugitive gasen_US
dc.subjectGas migrationen_US
dc.subjectMethaneen_US
dc.subjectMethane oxidationen_US
dc.subjectOil and gas developmenten_US
dc.subjectSoil gasen_US
dc.subjectVadose zoneen_US
dc.titleFugitive Gas Migration in the Vadose Zone at an Experimental Field Site in the Montney Shale Gas Regionen_US
dc.typejournal articleen_US
ucalgary.item.requestcopytrueen_US
ucalgary.scholar.levelFacultyen_US
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