Burial history and source rocks characteristics of the montney formation, Alberta basin, Canada
Notice bibliographique
Résumé
More than 300 samples from the Montney Formations in the Alberta basin, offshore, Canada have been analysed with locations in various parts of the Alberta basin.These samples were mainly analyzed from two wells (well M28 & M22) to assess the organic quality, quantity as well as thermal maturation by Tmax versus PI (Production Index) from Rock-Eval Pyrolysis and Vitrinite Reflectance data.Two well locations (301 & 306) have been chosen for calibrating burial history and thermal maturation models in the Alberta basin because of their measured bottom hole temperature data which was assumed to be taken from the nearby well.These well locations also have measured Vitrinite Reflectance data which was taken directly from coal-bearing Mannville Group.The Triassic Montney Formation silty shale and shale, was deposited within an anoxic depositional environments and shows a wide variability of organic oil and gas prone Type II, II-III and III source rocks.M22 samples display excellent organic matter quantity (TOC up to 5.80%), and Type II and Type III kerogens, which are favourable for hydrocarbon generation.The high TOC values generally indicate that the condition during the deposition of sediments was favourable for organic matter production and preservation.The genetic potential (GP) and hydrogen Index (HI) is above the minimum values required for a potential source rock, suggesting that the sediments have gas and oil generating potential.However, in M22, only few samples met the requirements for the organic matter quantity, quality, and thermal maturity in order to be called source rocks.This could be because the samples from M28 were collected from outcrops which are easily affected by weathering.This significantly changed the TOC values and affected thermal maturation and Rock-eval Pyrolysis parameters.The burial history plots shows that location (306 and 301) experienced a period of nondeposition and/or erosion that began between latest Devonian-earliest Carboniferous.The second major erosional event was caused by the Late Cretaceous regional uplift that influenced petroleum generation, migration, and accumulation.The Vitrinite Reflectance values have been measured for all stratigraphic units in the Alberta basin.The immature phase for oil and gas generation is (< 0.54%), early mature (0.54-0.70%) mid mature (0.70-1.00%), late mature (1.00-1.30%)wet gas (1.30-2.00%)and dry gas generation (2.00-2.60%).The maturity history suggests that the deepest parts of the assigned source rock units entered the hydrocarbon generation already during the Triassic.The maturity increased during the upper Jurassic and reached a peak during Early Cretaceous.The burial history plots for well 301 location indicates that the timing for the start of oil generation occurred within a relatively narrow range, around 139 Ma.The generation of gas from the cracking of Woodbend group oil started from the Mid-Cretaceous to Late Cretaceous.In well 306 location, the generation of gas from the cracking of Wabamun oil began at about 80 Ma.However, the source interval matured much earlier than at well 301 location.Early oil generation began as early as 205 Ma (Upper Triassic), when burial depth was just 1703 m.The main phase of oil generation occurred 127 Ma later when the basin was buried at 1712 m.http://etd.uwc.ac.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| 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 | 0,003 | 0,004 |
| Études des sciences et des technologies | 0,002 | 0,001 |
| Communication savante | 0,001 | 0,000 |
| Science ouverte | 0,001 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,003 | 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 source (Gemma direct ou Codex distillé), 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 ».