Microbial generation of economic accumulations of methane within a shallow organic-rich shale

  title={Microbial generation of economic accumulations of methane within a shallow organic-rich shale},
  author={Anna M. Martini and Joyce M. Budai and Lynn M. Walter and Martin Schoell},
ALTHOUGH methane of bacterial origin is ubiquitous in marine and freshwater sediments, economic accumulations of bacterial gases occur mainly at depths of several kilometres in Tertiary basins that had high sedimentation rates1,2. Here we present an integration of geochemical and isotopic data from gas and water extracted from the Upper Devonian Antrim shale, along the northern margin of the Michigan basin, which demonstrates that significant volumes of bacterial gas have been generated in… Expand
Microbial production and modification of gases in sedimentary basins: A geochemical case study from a Devonian shale gas play, Michigan basin
An expanded data set for gases produced from the Antrim Shale, a Devonian black shale in the Michigan basin, United States, has allowed for a detailed examination of the related chemical and isotopicExpand
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There was a reduction in microbial richness and diversity after fracturing, with the lowest diversity at 49 days, and Thirty-one taxa dominated injected, flowback, and produced water communities, which took on distinct signatures as injected carbon and electron acceptors were attenuated within the shale. Expand


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