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TitreHydrocarbon potential and depositional environment of the Lower Cretaceous Garbutt Formation, Liard Basin, Canada
AuteurHaeri-Ardakani, O; Sanei, H; McMechan, M; Van de Wetering, N; Reyes, J; Ferri, F
SourceCSPG Geoconvention 2015: New Horizons, abstracts; Canadian Society of Petroleum Geologists, Canadian Society of Exploration Geophysicists, Joint Annual Meeting, Abstracts 2015 p. 1-4, https://doi.org/10.1016/j.fuel.2017.07.106
Année2015
Séries alt.Secteur des sciences de la Terre, Contribution externe 20140399
ÉditeurCSPG
RéunionCSPG Geoconvention 2015; Calgary; CA; mai 4-8, 2015
Documentpublication en série
Lang.anglais
DOIhttps://doi.org/10.1016/j.fuel.2017.07.106
Mediapapier
Formatspdf
ProvinceColombie-Britannique
SNRC94I/11; 94I/12; 94I/13; 94I/14; 94J/09; 94J/10; 94J/11; 94J/12; 94J/13; 94J/14; 94J/15; 94J/16; 94K/09; 94K/10; 94K/15; 94K/16; 94N; 94O; 94P/03; 94P/04; 94P/05; 94P/06; 94P/11; 94P/12; 94P/13; 94P/14
Lat/Long OENS-126.0000 -121.0000 60.0000 58.2500
Sujetshydrocarbures; capacité de production d'hydrocarbures; milieu sédimentaire; Crétacé inférieur; Bassin de Liard ; Formation de Garbutt ; combustibles fossiles; stratigraphie; Mésozoïque; Crétacé
Illustrationslocation maps
ProgrammeCaractérisation des réservoirs de schiste, Les géosciences pour les nouvelles sources d'énergie
ProgrammeLe Programme de recherche et de développement énergétiques (PRDE)
LiensOnline - En ligne
Résumé(Sommaire disponible en anglais seulement)
This study presents organic matter (OM) characterization, thermal maturity, hydrocarbon potential and paleo-redox sedimentary conditions of the Lower Cretaceous Garbutt Formation in the Liard Basin in British Columbia. The study compares outcrop samples from western edge of the basin to subsurface core samples from the eastern margin. Lower Garbutt lithology varies from coarse-grained siltstone (mean = 51.9?m) in the west to shaley facies in the eastern part of the basin. The major OM constituents of western outcrop samples are vitrinite and inertinite macerals (kerogen Type III) that are mainly reworked. Minor amounts of migrabitumen have filled intergranular porosities. In contrast core samples from near the eastern basin margin consist of kerogen Type II, dominantly composed of liptinite group macerals (alginite) with lower abundance of vitrinite and intertinite group macerals. Total organic carbon (TOC) content of outcrop samples is significantly lower (mean: 1.21 wt. %) than subsurface core samples (mean: 4.2 wt. %). Outcrop samples are at the end of oil window while the maturation of core samples varies from onset of the oil window to the condensate zone with a gradual north to south increase in thermal maturity. Intercrystalline porosity associated with framboidal pyrite and microfossil interskeletal porosity host free oil in the core samples, whereas, intergranular porosity forms the major pore spaces in silty outcrop samples. These results indicate that the Garbutt Formation near the eastern margin of the Liard Basin in British Columbia could potentially be an excellent target for unconventional oil and wet gas exploration. Paleo-redox trace element (i.e., Mo and U) enrichment factor (EF) of subsurface samples relative to average shale is higher by two orders of magnitude. In contrast outcrop samples have no significant EF. The predominance of terrestrial OM (kerogen Type III), coarser grain size, and higher detrital mineral contents of outcrop samples in comparison to the mainly marine OM (kerogen Type II, liptinite group), finer grain sediments and significantly higher TOC content and paleo-redox trace elements concentrations suggest the primary source of sediment for the Garbutt Formation was from the west. The trace elements record of core samples show small scale variation in the basin redox condition.
Résumé(Résumé en langage clair et simple, non publié)
Cet exposé dans le cadre de la conférence décrit les résultats des études de géochimie organique portant sur des échantillons prélevés dans le substratum rocheux et en subsurface dans la Formation de Garbutt du Crétacé inférieur, dans les parties ouest et est du bassin de Liard en Colombie-Britannique.
GEOSCAN ID295740