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TitleGeothermal assessment of a conventional hydrocarbon reservoir in eastern Québec: preliminary field and petrophysical data
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorLarmagnat, S; Lavoie, DORCID logo; Rajaobelison, M M; Raymond, J
SourceGeological Survey of Canada, Open File 8597, 2019, 44 pages, Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
File formatpdf (Adobe® Reader®)
NTS22B/04; 22B/05; 22B/12; 22C/01; 22C/08; 22C/09
AreaSainte-Angèle-de-Mérici; Lac Matapédia; Lac Mistigougèche; Gaspésie
Lat/Long WENS -68.5000 -67.5000 48.7500 48.0000
Subjectsgeophysics; stratigraphy; structural geology; tectonics; Science and Technology; Lower Silurian; geothermal resources; geothermal potential; reservoir rocks; reservoir parameters; bedrock geology; lithology; sedimentary rocks; carbonates; clastics; dolomites; siltstones; limestones; breccias; sandstones; reefs; structural features; faults; folds; synclines; wells; core samples; porosity; permeability; lithofacies; sedimentary facies; petrophysics; thermal conductivity; thermal diffusivity; field work; tectonic setting; hydrothermal systems; tectonostratigraphic zones; in-field instrumentation; Sayabec Formation; Saint-Léon Formation; Val-Brillant Formation; Chaleurs Group; Gaspé Belt; Massé No.1 Well; Massé No.2 Well; Neigette Fault; Shickshock Sud Fault; Porc-Épic Fault; Mistigougèche Fault; Matapédia Syncline; Phanerozoic; Paleozoic; Silurian
Illustrationslocation maps; geoscientific sketch maps; stratigraphic sections; tables; photographs; schematic diagrams; schematic representations; bar graphs; plots
ProgramEnvironmental Geoscience Program Management
Released2019 08 29
AbstractIn eastern Québec, the Sayabec Formation is a lower Silurian carbonate unit well known for its natural macro porous intervals occurring both at the outcrop scale and in the subsurface, and interpreted as hydrothermal dolomite (HTD) units. The Sayabec Formation represents a potential reservoir analog to the Albion-Scipio oil field (Ordovician, Michigan basin, USA) and has been targeted by a local oil and gas operator since 2010, which resulted in the drilling of about 6000 meters of stratigraphic wells in the Témiscouata area. This provided an ideal case study to test how conventional methods for oil and gas exploration can be applied to assess geothermal properties of reservoir units. To better understand the conventional reservoir properties (e.g. porosity and permeability variability with respect to lithofacies), their spatial heterogeneity and how these properties can be used to evaluate geothermal parameters; outcrops were revisited in the Témiscouata area to collect a consistent, although limited, new sample set of key sedimentary facies within the lower Silurian succession for this pilot project. A total of eight distinctive lithologies were defined and analysed using both an infrared thermal conductivity scanner and probe permeametry, providing critical fine scale assessment of thermophysical properties of the lower Silurian carbonates and clastics. Those preliminary field data are compared with pre-existing porosity and permeability laboratory measurements made on core samples from wells drilled in the same study area.
Summary(Plain Language Summary, not published)
As part of the Environmental Geoscience Program, conventional methods applied to oil and gas are revisited to address heat transfer mechanisms in a Silurian sedimentary succession in eastern Québec. This report compiles preliminary results from fieldwork and thermal and petrophysical properties (porosity, permeability, thermal conductivity and diffusivity) of key rock types in the Massé structure (Témiscouata area). The dataset recognizes eight distinctive lithologies, and thermophysical properties data include infrared thermal conductivity scanner and probe permeametry measures. The Val-Brillant sandstones and the St-Léon siltstones correspond to end-members in terms of mineralogy content with quartz-rich and clay-rich lithology, and correspond to the highest and lowest thermal conductivity values respectively. For Sayabec limestone facies thermal conductivities remained low to moderate except from hydrothermal breccia that could reach values even higher than sandstone in some cases.

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