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TitleBaseline geological and geochemical near surface data - the case of the Utica Shale in southern Quebec
AuthorLavoie, D; Rivard, C; Bordeleau, G; Mort, A; Aznar, J -C; Malo, M
SourceGeoConvention 2014: FOCUS, abstracts; 2014 p. 1-4
LinksOnline - En ligne
Alt SeriesEarth Sciences Sector, Contribution Series 20130389
MeetingCSPG Annual meeting; Calgary; CA; May 12-14, 2014
Mediaon-line; digital
File formatpdf
ProvinceQuebec; Ontario
NTS21L; 31H; 31I
AreaSt. Lawrence Platform
Lat/Long WENS -75.0000 -71.0000 46.7500 45.0000
Subjectsfossil fuels; hydrogeology; geochemistry; environmental geology; hydrocarbons; hydrocarbon potential; groundwater; groundwater resources; groundwater pollution; groundwater geochemistry; environmental analysis; environmental studies; environmental impacts; Utica Shale
Illustrationslocation maps; stratigraphic columns; photographs; plots
ProgramShale Gas - seismicity, Environmental Geoscience
Shale gas and tight oil exploration and development in populated areas with little past experience with the hydrocarbon industry is usually met with some str ong opposition most of which is based on the perception of risk for groundwater quality . The industry and the public geoscience organizations are responsible for evaluating and monitor ing the environmental impacts of unconventional resources development. The Geological Survey of Canada has initiated a detailed evaluation of shallow sub - surface conditions (geology, hydrogeology, geochemistry) at a specific site south west of Quebec City wher e one shale gas well targeting the Utica Shale has been drilled and fracked. Soil gas, dissolved hydrocarbons in groundwater and organic geochemistry of extracts from shallow cores have been analysed for the origin of the gas . Preliminary g roundwater data suggest a mi xed biogenic and thermogenic origin for the gas (C1 to C3), and GC and GC - MS of the extracts document up to C20 hydrocarbons in the shallow bedrock . The establishment of baseline geological and hydro geo logical settings is a critical first step prior to large scal e development of unconventional hydrocarbons.
Summary(Plain Language Summary, not published)
This abstract will present preliminary geochemical data in groundwater, soils and bedrock that were gathered up to now in this project (Environmental Geoscience Program). One of the goals of the study is to identify the source of gas present in groundwater in the St. Edouard de Lotbinière (65 km SW of Quebec City). Some preliminary ideas are considered but without certitude so far. This will be explained in the presentation.