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TitleThe final North America conventional oil frontier: The intracratonic Hudson Bay Basin in the Canadian Arctic
AuthorLavoie, D; Pinet, N; Dietrich, J; Kohn, B P; Zhang, S; Hu, K; Armstrong, D; Nicolas, M; Asselin, E; Bertrand, R; Duchesne, M J; Decker, V; Galloway, J; Reyes, J; Brake, V
SourceAAPG 2013 Annual Convention and Exhibition; American Association of Petroleum Geologists, Annual Meeting Abstracts (2013), no. 90163, 2013 p. 1
LinksOnline - En ligne
Year2013
Alt SeriesEarth Sciences Sector, Contribution Series 20120298
PublisherAmerican Association of Petroleum Geologists
MeetingAAPG Annual Convention and Exhibition; Pittsburg; US; May 19-22, 2013
Documentserial
Lang.English
Mediapaper; on-line; digital
File formathtml
ProvinceNunavut
AreaHudson Bay Basin
Subjectsbasins; seismic reflection surveys; seismic profiles, marine; observation wells; offshore wells; biostratigraphy; hydrocarbons; hydrocarbon potential; oil shales; oil accumulation; remote sensing; RADARSAT; Ordovician; Devonian
ProgramHudson / Foxe Bay Sedimentary Basins, GEM: Geo-mapping for Energy and Minerals
AbstractThe Hudson Bay Basin covers ~820,000 km² and is the largest intracratonic basin in North America. The succession of the Hudson Platform consists mainly of Paleozoic strata, with a maximum preserved thickness of about 2500 m. The Paleozoic succession includes Ordovician to Devonian shallow marine carbonates, reefs and shales with locally thick Devonian evaporites. Paleozoic strata are unconformably overlain by erosional remnants of Jurassic, Cretaceous and Tertiary non-marine and marine strata. In a first phase of exploration (1973-1985), over 46,000 line-km of seismic reflection data were acquired and 5 offshore exploration wells drilled. Most of the seismic profiles and all of the exploration wells are located in a relatively small area in the central part of Hudson Bay.
Re-evaluation of the available seismic indicates that syn-tectonic sedimentation occurred in Late Ordovician(?), Silurian and Early Devonian with significant depocentre migration with time. New biostratigraphic data, supported by the seismic evidence, suggest 3 major unconformities, with the most important one at the Silurian-Devonian boundary. Preliminary interpretation of AFT data suggest that maximum burial occurred likely in Middle to Late Devonian and in agreement with organic matter reflectance data (Rovit of 0.60 to 0.91%), imply that the Ordovician - Silurian interval went through the oil window. Available hydrocarbon system data are synthesized in 5 prospective petroleum plays, including recently recognized porous hydrothermal dolomites and reefs. Type I/II Upper Ordovician oil shales are recognized at several locations in the basin with TOC values up to 35% and thickness up to 11 metres. Lower Silurian shales may also have local potential (TOC values up to 2%). New high-resolution bathymetric surveys in Hudson Bay led to the recognition of circular sea-floor depressions similar to fluid-escape pockmarks and preliminary interpretations of RADARSAT images suggest possible oil slicks at sea surface. Some direct hydrocarbon indicators are interpreted from the vintage seismic information. Taken together, these new hydrocarbon systems data suggest that large areas of the Hudson Platform are prospective for oil accumulations.
GEOSCAN ID292008