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TitreA standard lithofacies scheme for the Missisauga and Logan Canyon formations of the Scotian Basin and its application to long sections of conventional core
TéléchargerTéléchargements
AuteurGould, K M; Karim, A; Piper, D J W; Pe-Piper, G
SourceCommission géologique du Canada, Dossier public 6745, 2010, 119 pages, https://doi.org/10.4095/287318 (Accès ouvert)
Image
Année2010
ÉditeurRessources naturelles Canada
Documentdossier public
Lang.anglais
DOIhttps://doi.org/10.4095/287318
Mediaen ligne; numérique
Formatspdf
ProvinceRégion extracotière de l'est
Lat/Long OENS-64.0000 -53.0000 46.0000 43.0000
Sujetslithofaciès; grès; mudstones; turbidites; lithologie; faciès; faciès sédimentaires; pétrographie; pétrologie du sediment; Crétacé inférieur; diagenèse; Formation de Lower Missisauga ; Formation de Logan Canyon ; Puit Alma F-67 ; Puit Alma K-85 ; Puit Cohasset A-52 ; Puit Como P-21 ; Puit Glenelg E-58a ; Puit Glenelg E-58 ; Puit Glenelg H-59 ; Puit Glenelg N-49 ; Puit Kegeshook G-67 ; Puit North Triumph G-43 ; Puit Panuke B-90 ; Puit Tantallon M-47 ; Puit Thebaud C-74 ; Puit Thebaud I-93 ; Puit Venture B-13 ; Puit Venture B-52 ; Puit Venture H-22 ; géologie marine; sédimentologie; Mésozoïque; Crétacé
Illustrationslocation maps; tables; stratigraphic columns; photographs
ProgrammeAnalyse de bassin et ressources géoscientifiques, Géoscience en mer
Diffusé2010 12 30
Résumé(disponible en anglais seulement)
This report proposes a hierarchical scheme of sedimentary facies applicable to the Lower Cretaceous rocks of the Missisauga and Logan Canyon formations in the Scotian Basin. This succession hosts the major gas discoveries in the basin. The eleven facies, each of which is divided into several subfacies, are: 0 - delta front sandstone-mudstone turbidites; 1 - open shelf fossiliferous shales; 2 - shoreface sandstones and mudstones; 3 - intervals of condensed sedimentation (principally during transgressions); 4 - tidal estuary to fluvial sandstones; 5 - intertidal to subtidal sandy to mixed flats; 6 - intertidal muddy to mixed flats; 7- tidal marsh lignite or carbon-rich mud; 8 - lagoonal muds; 9 - river mouth to prodelta sandstone turbidites; 10 - highly deformed sediments.
These facies have been applied to long logged sections of conventional core in the following wells: Alma K-85, Alma F-67, Cohasset A-52, Como P-21, Glenelg E-58, Glenelg E-58A, Glenelg H-59, Glenelg N-49, Kegeshook G-67, North Triumph G-43; Panuke B-90,
Tantallon M-41, Thebaud C-74, Thebaud I-93, Venture B-13, Venture B-52, and Venture H-22.
Three characteristic vertical successions of facies are recognized: prodelta, shoreface, and tidal parasequences. The prodelta parasequence is found in both inboard and outboard wells, however it is the dominant parasequence in outboard wells (e.g., Alma and Glenelg fields). Tidal parasequences are common in inboard wells (Cohassett A-52, Como P-21, Kegeshook G-67, and Panuke B-90) but are also found in wells farther outboard (North Triumph G-43, Thebaud I-93, Venture B-52, and Glenelg N-49). Shoreface parasequences are generally foundwithin more inboard wells including Cohasset A-52, Panuke B-90, Thebaud I-93, and Venture B-13 and B-52.
This facies scheme is general enough to apply to both inboard and outboard wells in the Scotian Basin, while having enough subfacies to capture details within each depositional environment.
GEOSCAN ID287318