3D hydrostratigraphic modelling of the Paleozoic bedrock of southern Ontario
Notice bibliographique
Résumé
The Geological Survey of Canada, the Ontario Geological Survey, the Ministry of Natural Resources and Forestry and the Ontario Oil, Gas and Salt Resources (OGSR) Library have initiated a cooperative project to create a regional 3D model of the layered Paleozoic bedrock strata of southern Ontario, and the occurrence of water within these strata. A wealth of data are available, including digital records from 400,000 water wells that penetrate the bedrock, nearly 27,000 petroleum wells records, and approximately 300 stratigraphic boreholes in shallow bedrock formations completed by the Ontario Geological Survey. Petroleum well records are the key data source for the model, with data already coded in an Oracle relational database with geographic coordinates and elevation data for all wells. There are depth and elevation values for nearly 600,000 formation tops and over 35,000 water interval records with information on water type, depth interval and static level. A significant number of QC edits has greatly improved accuracy and reliability of this data set since 2001, with further improvements to be funded by the GSC as part of this project. Also available are compositional analyses for over 1000 samples of produced water from petroleum wells, isotopic and compositional analyses for 130 samples of deep to intermediate groundwater, 89 water type maps and 17 static level maps for deep groundwater aquifers, and field observations from springs, quarries, road cuts, outcrops, well testing, and drill core examinations. The model will incorporate and build on a published regional 2D conceptual model of groundwater systems in the bedrock of southern Ontario, documenting a hydrochemical zonation of water by depth into a shallow fresh water system, an intermediate sulphur water system and a deep brine system. Hydrostratigraphic units in the southern Ontario bedrock are known to cross formational boundaries. Hydrostratigraphic units also change character laterally, within the same formation, due to facies changes, diagenetic modification, faulting and, of particular significance in southern Ontario, karstification of carbonate or evaporite strata at unconformities. Paleokarst horizons are known to be a key geological control on aquifers in the bedrock. Modelling of this inhomogeneity is a complex technical and conceptual task and will comprise an iterative process of modelling, QA/QC data review and editing, and critical geological appraisal. Final products will be co-released by GSC and the OGS with access via the OGSR Library website, and will include a 3D model in both Leapfrog and ESRI ArcGIS formats, a 2D conceptual hydrostratigraphic model, and improvements in data quality and accuracy in the petroleum well database. Numeric groundwater flow modelling is beyond the scope of this project but the static model will support dynamic modelling. Target date for project completion is mid to late 2018.
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 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) | 0,001 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| 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) | 0,006 | 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 ».