The Sedimentology, Stratigraphy and Reservoir Characteristics of the Montney D1 and D2 Horizons, Greater Pouce Coupe Area, Alberta and British Columbia
Notice bibliographique
Résumé
The Middle Montney D1 and D2 Horizons in the Greater Pouce Coupe Area are important exploration targets. These moderate porosity and low permeability siltstone units have been referred to as distal shelf deposits in the past, based primarily on their restricted grain size. The D1 and D2 Horizons host a considerable volume of liquids rich natural gas. Considering this, a refined and robust interpretation of the paleodepositional setting and stratigraphic architecture of these units is crucial to facilitate exploration success. To achieve this objective, detailed sedimentological and ichnological data was recorded from 31 cores within an area of approximately 3200 km2. Geophysical logs from 1000 wells were analyzed to correlate important surfaces and to understand the distribution of the D1 and D2 Horizons throughout the study area. Additionally, XRF derived elemental compositions were used to confirm and refine sequence stratigraphic interpretations and were used as proxies to infer changes in D1 and D2 Horizons depositional processes. Eight distinct lithofacies are identified from the dataset. Lithofacies analyses indicate that the studied strata represent distal offshore to offshore-transition sedimentary environments. Linear sourced turbidity currents are thought to be the most important mechanism for sediment deposition. An arid coastline with numerous ephemeral river systems transported large volumes of sediment to the coast during storms. This may have created an over steepened shoreface / wave-dominated delta profile, which was prone to mass wasting events. Additionally, the study area was in a structurally complex setting, and as a result syn-depositional structural reactivations would have been equally likely to trigger mass wasting events. The D1-D2 transition is characterized by the presence of silty shale beds. The presence of appreciable amounts of clay in the Montney is rare except for a few areas. These areas are interpreted to have been deposited under the influence of perennial deltaic systems. During the D1-D2 transition silty shale beds indicate that there was a perennial river system running through the Hines Creek Graben sourcing clay. This work has contributed to the understanding of the sedimentology and the stratigraphic architecture of the Montney Formation in the Greater Pouce Coupe Area that will help decrease exploration risk. Ideally, the integration of detailed sedimentologic observations with regional mapping and geochemistry shown within this work will aid in other studies of the Montney Formation as well as in other unconventional plays around the world.
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Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,001 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,001 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».