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dc.contributor.advisorMcIntosh, Jennifer C.en_US
dc.contributor.authorPantano, Christopher Patricken_US
dc.creatorPantano, Christopher Patricken_US
dc.date.accessioned2012-06-11T20:35:36Z
dc.date.available2012-06-11T20:35:36Z
dc.date.issued2012
dc.identifier.urihttp://hdl.handle.net/10150/228441
dc.description.abstractExtensive research has been conducted in numerous coalbed methane (CBM) basins; however, the Williston Basin (WB) remains largely unexamined due to the absence of CBM production despite large coal reserves. CBM in WB coalbeds has been reported, but there has been no systematic study on gas origin and distribution, or hydrogeochemical controls on gas generation to date. This study aims to determine differences in chemistry between groundwaters with and without the presence of CH₄ to better understand factors affecting CBM generation. Results reveal that shallow gas accumulations in WB coalbeds are microbial in origin and formed via CO₂ reduction. CBM is associated with Na-HCO₃ type groundwater with SO₄ concentrations<1 mmole/L due to cation exchange and sulfate reduction, respectively. These groundwaters occur in deeper units of the Fort Union Formation, underlying multiple coalbeds, suggesting that CH₄ is present in waters that have reacted extensively with formations containing low-rank (lignite) coals.
dc.language.isoenen_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.subjectmethanogenesisen_US
dc.subjectnatural gasen_US
dc.subjectsulfate reductionen_US
dc.subjectWilliston Basinen_US
dc.subjectHydrologyen_US
dc.subjectcoalen_US
dc.subjectmethaneen_US
dc.titleHydrogeochemical Controls on Microbial Coalbed Methane Accumulations in the Williston Basin, North Dakotaen_US
dc.typetexten_US
dc.typeElectronic Thesisen_US
thesis.degree.grantorUniversity of Arizonaen_US
thesis.degree.levelmastersen_US
dc.contributor.committeememberFerre, Paul A.en_US
dc.contributor.committeememberMeixner, Thomasen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineHydrologyen_US
thesis.degree.nameM.S.en_US
refterms.dateFOA2018-05-18T02:51:29Z
html.description.abstractExtensive research has been conducted in numerous coalbed methane (CBM) basins; however, the Williston Basin (WB) remains largely unexamined due to the absence of CBM production despite large coal reserves. CBM in WB coalbeds has been reported, but there has been no systematic study on gas origin and distribution, or hydrogeochemical controls on gas generation to date. This study aims to determine differences in chemistry between groundwaters with and without the presence of CH₄ to better understand factors affecting CBM generation. Results reveal that shallow gas accumulations in WB coalbeds are microbial in origin and formed via CO₂ reduction. CBM is associated with Na-HCO₃ type groundwater with SO₄ concentrations<1 mmole/L due to cation exchange and sulfate reduction, respectively. These groundwaters occur in deeper units of the Fort Union Formation, underlying multiple coalbeds, suggesting that CH₄ is present in waters that have reacted extensively with formations containing low-rank (lignite) coals.


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