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TitleMineralogical controls on organic-hosted pore volume and pore size - Duvernay Formation, Alberta, Canada
AuthorKnapp, L J; Uchida, S; Nanjo, T; Ardakani, O HORCID logo
SourceGeoconvention 2019, technical program; 2019 p. 1-5 Open Access logo Open Access
LinksOnline - En ligne (PDF, 912 KB)
Alt SeriesNatural Resources Canada, Contribution Series 20180339
MeetingGeoConvention 2019; Calgary, AB; CA; May 13-15, 2019
DocumentWeb site
Mediaon-line; digital
File formatpdf (Adobe® Reader®)
NTS73D; 73E; 73L; 73M; 83
Lat/Long WENS-119.0000 -111.0000 56.0000 52.0000
Subjectsfossil fuels; sedimentology; mineralogy; geochemistry; Science and Technology; petroleum resources; hydrocarbons; reservoir rocks; pore size; pore structure; pore fluids; porosity; core samples; wells; mineralogical analyses; mass spectrometer analysis; x-ray diffraction analyses; scanning electron microscope analyses; organic geochemistry; organic carbon; thermal maturation; pyrolysis; petrographic analyses; Duvernay Formation; Chevron Fox Creek 08-15 Well; Chevron KaybobS 14-20 Well; ECA Saxon 11-08 Well; Phanerozoic; Paleozoic; Devonian
Illustrationsplots; spectra; photomicrographs
ProgramGeoscience for New Energy Supply (GNES) Shale Reservoir Characterization
Released2019 05 01
Organic matter contributes significantly to total porosity in self-sourced hydrocarbon reservoirs. However, the main controlling factor(s) for development and preservation of organic-hosted porosity are not well understood. By examining the Duvernay Formation of western Canada this study demonstrates an association between matrix composition and organic-hosted porosity. In this study, the contribution of organic- and inorganic-hosted pores in total porosity were quantified by deconvolution of laboratory-based nuclear magnetic resonance (NMR) curves. Significant secondary feldspar dissolution porosity in the T2 range of clay-bound water is observed in the wet gas window near Fox Creek.
Summary(Plain Language Summary, not published)
This study presents an interesting examination on the factors influencing organic-hosted porosity. Ratios of biogenic silica and muscovite to TOC act as proxies for subsurface processes, and offer an explanation for local variability in organic-hosted porosity.

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