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Titre	Vertical and lateral facies heterogeneities within the Montney Formation of NE BC: implications for fluid mapping
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Auteur	Mackie, S J; Furlong, C M; Ardakani, O H; Pedersen, P K
Source	GeoConvention 2021, abstracts; 2021 p. 1-2 Accès ouvert
Liens	Online - En ligne
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Année	2021
Séries alt.	Ressources naturelles Canada, Contribution externe 20210353
Éditeur	GeoConvention Partnership
Réunion	GeoConvention 2021; Septembre 13-15, 2021
Document	site Web
Lang.	anglais
Media	numérique; en ligne
Formats	pdf
Province	Colombie-Britannique
SNRC	93I; 93O; 93P; 94A; 94B; 94G; 94H; 94I; 94J
Région	Dawson Creek; Parkland
Lat/Long OENS	-123.0000 -120.0000 58.2500 54.5000
Sujets	ressources pétrolières; hydrocarbures; faciès sédimentaires; roches reservoirs; fluides du réservoir; techniques de cartographie; hydrogene sulfuré; migration des fluides; géologie du substratum rocheux; lithologie; roches sédimentaires; évaporites; caractéristiques structurales; fractures; perméabilité; échantillons carrotés; diagraphie géophysique; Formation de Montney ; combustibles fossiles; stratigraphie; géologie structurale; géochimie; géophysique; Sciences et technologie; Nature et environnement; Phanérozoïque; Mésozoïque; Trias; Paléozoïque; Dévonien
Programme	Les géosciences de l'énergie Ressources d'énergie propre - réduire les risques environnementaux
Diffusé	2021 09 01
Résumé	(disponible en anglais seulement) Within individual stratigraphic units, understanding vertical and lateral heterogeneities are key in mapping and predicting fluid distributions. The regional stratigraphy of the Lower Triassic Montney Formation has been well established as three 3rd order sequences, the Lower, Middle, and Upper (e.g. Crombez et al., 2016; Davies et al., 2018; Henderson et al., 2018; Zonneveld and Moslow, 2018). Within each of the three Montney members, locally high concentrations of hydrogen sulfide (H2S) are present, however, there are few published studies on the origin and distribution of H2S in the Montney (Desrocher et al., 2004). Previous studies placed data within each Montney member but did not account for multiple high permeability zones with variable H2S concentration within each member (Chalmers et al., 2019). Recent petrographic and isotopic analyses by Liseroudi et al. (2020, 2021), have shown part of sulfate-rich fluids that led to formation of Montney's H2S to be sourced from underlying Devonian evaporites, implying fluid migration through fracture systems. Thus, the mapping of structures and fracture systems and understanding stratigraphic permeability distributions is crucial for predicting elevated H2S occurrence within the Montney Formation. This study investigates the vertical and lateral facies variations within the Dawson - Parkland area of northeastern British Columbia at a local scale. By connecting facies identified in core to wireline log responses, facies can be mapped throughout a study area. Detailed facies mapping allows for a better understanding of the vertical and lateral heterogeneities present within an individual Montney member. A refined understanding of the facies variations present within a single Montney member allows for more accurate fluid distribution mapping. Improved fluid mapping is key in understanding the geologic processes that create areas of elevated H2S within the Montney Formation.
Sommaire	(Résumé en langage clair et simple, non publié) Au sein des unités stratigraphiques individuelles, la compréhension des hétérogénéités verticales et latérales est essentielle pour cartographier et prévoir les distributions de fluides. Une compréhension plus fine des variations de faciès présentes dans un seul membre de Montney permet une cartographie plus précise de la distribution des fluides. L'amélioration de la cartographie des fluides est essentielle pour comprendre les processus géologiques qui créent des zones à forte teneur en H2S dans la formation de Montney.
GEOSCAN ID	329037