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TitleSedimentary petrology of the upper Cree Member in the Cohasset A-52 well, Scotian Basin, offshore Nova Scotia
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorPe-Piper, G; Wallace, K; Piper, D J WORCID logo
SourceGeological Survey of Canada, Open File 8537, 2020, 532 pages, Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
Mediadigital; on-line
RelatedThis publication is related to the following publications
File formatreadme
File formatpdf; rtf; xlsx (Microsoft® Excel®); xls (Microsoft® Excel®)
ProvinceEastern offshore region; Nova Scotia
AreaScotian Basin
Lat/Long WENS -61.0000 -60.0000 44.2500 43.7500
Subjectsmarine geology; sedimentology; mineralogy; fossil fuels; geophysics; Science and Technology; Nature and Environment; sedimentary petrology; reservoir rocks; detrital minerals; bedrock geology; lithology; sedimentary rocks; sandstones; turbidites; diagenesis; paragenesis; wells; core samples; electron microscope analyses; depositional environment; depositional history; source rocks; provenance; fluid dynamics; salinity; feldspar; sphalerite; quartz; glauconite; siderite; francolite; calcite; phosphates; phosphorites; paleodrainage; petroleum resources; petrographic analyses; stratigraphic analyses; lithofacies; clasts; inclusions; porosity; permeability; geophysical logging; gamma ray logging; mineral assemblages; electron probe analyses; carbonate; Cree Member; Logan Canyon Formation; Cohasset A-52 Well; Ancestral Sable River; Ancestral Banquereau River; Appalachian Province; Grenville Province; Phanerozoic; Mesozoic; Cretaceous
Illustrationslocation maps; stratigraphic columns; lithologic sections; geophysical logs; photomicrographs; pie charts; geochronological charts; plots; ternary diagrams; tables; photographs
ProgramGeoscience for New Energy Supply (GNES) Frontier basin analysis
Released2020 01 27
AbstractThis report provides detailed petrological study of the upper Cree Member sandstone reservoirs in the Cohasset A-52 well of the Scotian Basin. Textures were studied from backscattered electron images from a scanning electron microscope (SEM). Minerals were identified by their chemistry using energy dispersive spectroscopy by SEM and by electron microprobe. Reservoir sandstones comprise principally river-mouth turbidites and cross-bedded shore-face sandstones. K-feldspar is makes up >10% of the sandstone. The sandstones show the same paragenetic sequence of diagenetic minerals as deeper in the stratigraphy, but compaction and pressure solution of quartz is less prominent. Late hot saline fluids precipitated sphalerite. Glaucony-glauconite and coated grains with berthierine, siderite and francolite are reworked from the common transgressive units by erosion in flood-stage river channels and are deposited in river-mouth sandstones. Glauconite is most abundant in cross-bedded shoreface sandstones.
Summary(Plain Language Summary, not published)
A study of sandstones in one well in the Scotian Basin and the nature of diagenetic minerals that influence reservoir quality.

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