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TitreGeologic setting and tectonic evolution of Eagle Plain Basin, northern Yukon, Canada: Implications for petroleum potential
AuteurHannigan, P K; Lane, L S
SourceAGC-AMC-SCGP-SCSS Reunion conjoint, Receuil des Résumés vol. 39, 2016 p. 32-33
LiensOnline - En ligne
Année2016
Séries alt.Secteur des sciences de la Terre, Contribution externe 20150425
ÉditeurAssociation géologique du Canada
RéunionGAC-MAC 2016 Annual Conference; Whitehorse, YT; CA; juin 1- 3, 2016
Documentpublication en série
Lang.anglais
Mediapapier
Formatspdf
ProvinceYukon
SNRC106E; 106L; 116H; 116I
Lat/Long OENS-138.0000 -134.0000 67.0000 65.0000
Sujetspétrole; exploration pétrolière; production pétrolière; ressources pétrolières; analyse structurale; cuvettes synclinales; géologie générale; tectonique; Permien; Carbonifère; Paléozoïque
ProgrammeAnalyse des bassins frontaliers, Les géosciences pour les nouvelles sources d'énergie
Résumé(disponible en anglais seulement)
Eagle Plain in northern Yukon is underlain by an intermontane petroliferous sedimentary basin that has been shaped by multiple tectonic events throughout its Phanerozoic history. These eventsintimately affected the generation, migration and distribution of petroleum accumulations in the basin. Major advances in understanding the basin's structural evolution provided impetus for the Geological Survey of Canada to re-evaluate the petroleum potential of the basin incorporating newly-identified exploration play concepts. All discoveries to date are located in southern Eagle Plain and were drilled on large Laramide surface structures.Eagle Plain is located within the ordilleran Orogenic system of northern Canada characterized by marked crustal instability. Angular unconformities, diverse structural trends, fold bundles, and extension, contraction and transcurrent faults are common features of the region. During Late Devonian time, south-directed Ellesmerian tectonism affected the region. Broad east-west trending open folds are preserved in the subsurface of northeastern Eagle Plain Basin. In the basin, a major northeast-southwest feature called Eagle Arch, a pre-Mesozoic upwarp of Paleozoic strata, marks the northern limit of erosional edges of various Upper Paleozoic successions. The Arch was active during Late Carboniferous to Early Permian time resulting in erosion of the Carboniferous succession to the north. Early Permian Arch movement uplifted northern Eagle Plain
resulting in bevelling of underlying Paleozoic strata beneath the sub-Mesozoic unconformity. Early stages of the Cordilleran orogenesis produced Jurassic and Cretaceous mountain ranges to the south of Eagle Plain region. These ranges were the source areas for clastic debris that shed northward into the foredeep region through Late Cretaceous time. Broad north-trending folds detached by décollements within the Proterozoic succession were formed in Eagle Plain. To the west, more intense deformation produced mainly thrust faults.
In northeastern Eagle Plain, Laramide thrusting and folding of Mesozoic strata form Tertiary triangle zones marginal to the basin. Stratigraphic and combination traps are also present in Eagle Plain. These trap configurations include updip basinward facies changes, subcrops of Upper Paleozoic reservoirs beneath the sub-Cretaceous unconformity and carbonate-to-shale facies changes in Lower Paleozoic strata. The probabilistic assessment of total oil and gas potential (discovered and undiscovered) for all Phanerozoic sedimentary strata in the basin is 52.2*106 m3 (329 MMBO) of oil and 96.7*109 m3 (3.4 Tcf) of gas (in-place mean volumes).
Résumé(Résumé en langage clair et simple, non publié)
Une étude du potentiel en ressources pétrolières du bassin Eagle Plain, dans le nord du Yukon, est complétée. Des données suffisantes étaient disponibles dans la majorité des 21 champs définis et établis dans la colonne stratigraphique de l'Ordovicien au Crétacé afin de prédire leur potentiel en pétrole et gaz. L'évaluation probabiliste totale du potentiel de pétrole et de gaz (découvert et non découvert) pour toutes les strates sédimentaires phanérozoïques du Eagle Plain et de ses environs est de 52,2 millions de mètres cubes (329 millions de barils) de pétrole et 96,7 milliards de mètres cubes (3,4 trillions de pieds cubes) de gaz (volumes moyens en place). Des avancées majeures dans la définition de l¿évolution structurelle du bassin ont identifié de nouvelles possibilités d¿exploration dans la région. Ces nouveaux champs concepts, avec leurs volumes estimés, fournissent des informations importantes pour les parties prenantes impliquées dans l'évaluation des questions d'utilisation des terres et pour l'industrie pétrolière dans la poursuite de futures opportunités d'exploration.
GEOSCAN ID297574