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TitleUpper Ordovician reefs in the Hudson Bay Basin: porosity evolution and hydrocarbon charge
AuthorLavoie, DORCID logo; Castagner, A; Ardakani, O HORCID logo; Desrochers, A
SourceGeoconvention 2017, abstract archive; 195, 2017 p. 1-5 Open Access logo Open Access
LinksOnline - En ligne
Alt SeriesNatural Resources Canada, Contribution Series 20190414
MeetingGeoconvention 2017; Calgary, AB; CA; May 15-19, 2017
DocumentWeb site
Mediaon-line; digital
File formatpdf
AreaHudson Bay
Subjectsfossil fuels; sedimentology; Science and Technology; Nature and Environment
ProgramGEM2: Geo-mapping for Energy and Minerals Hudson/Ungava Hydrocarbon source rocks
Released2017 05 01
Research on hydrocarbon systems for the Hudson Bay (GEM 2 program 2014-2020) has initially focussed on detailed source rocks kinetic and potential hydrocarbon reservoir appraisal. Upper Ordovician reefs are sizeable mound structures in outcrop and on vintage seismic profiles. In outcrop, the reefs are porous (15-25%) with bitumen coating some pore space. The reefs are on top of high TOC and HI source rocks. Conventional and cathodoluminescence petrography has identified different cement phases (early marine to late cements) which were characterized with oxygen (delta-18O) and carbon (delta-13C) stable isotopes and fluid inclusion microthermometry; clumped isotopes signature (delta47) on late cements will be acquired for more temperature constraints on late cements.The Upper Ordovician reefs had significant open porosity at the time the slightly older source rocks entered the oil window.

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