Constraints Mapping at a SAGD Facility in the Oil Sands Region
Notice bibliographique
Résumé
Abstract OPTI Canada Inc./Nexen Canada Ltd. (OPTI/Nexen) developed a constraints map for their proposed Steam Assisted Gravity Drainage (SAGD) project near Anzac, Alberta. Constraints mapping is a graphical representation of the suitability of a land area for construction purposes. The objective of a constraints mapis to provide information that will allow reduction of a project's footprint in areas of higher constraint to trigger elevated levels of site mitigation and avoid "no-go" areas. OPTI/Nexen used the constraints map as a key planning tool during the conceptual and detailed designphase for their project to balance the placement of surface facilities with environmental and cultural land use sensitivities. A constraints map is a dynamic tool that can be used over the lifetime of a project, from initial screening at the beginning to detailed facility siting for future phase updates. Constraints maps take into consideration regulatory requirements; raw data such as disturbances, wetlands, field survey data, traditional use, historical sites, soils and air photos as well as derived data such as wildlife Habitat Suitability Index modelling results. They may also include subsurface environmental, surficial and subsurface engineering, and temporal constraints. Fundamentally, constraints mapping utilizes the same information as the Environmental Assessment process, however it processes the information in a slightly different manner. Introduction In December 2001, OPTI Canada Inc. and Nexen Canada Ltd. (OPTI/Nexen) retained Golder Associates Ltd. (Golder) to develop an environmental constraints map for their Long Lake Project lease area near Anzac, Alberta (Figure 1). What is a Constraints Map? A constraints map shows areas of high to low environmental and cultural importance based on sensitive features in the area. Sensitive features may include the habitat that animals and fish use for food or shelter, areas where rare plants are found, and protected places such as parks, traditional land use sites and cabins. "Constraint" means to restrict. An area of high environmental importance will be highlighted on the map as an area of high constraint, meaning that a disturbance to the land in this area could have a considerable effect on the sensitive features. Areas of moderate to low environmental importance will be highlighted on the map as having moderate to low constraint, meaning that disturbance to the land in this area could have less effect on the sensitive features. The constraints map also takes into account the combination of overlapping areas of importance. For example, if two or more sensitive features were found in the same area, such as a cabin and a berry-picking area, this location would have a higher environmental constraint than a location with just one sensitive feature. The constraints map is produced by a Geographic Information System (GIS). The GIS is a type of computer software that is designed to develop, manage, analyze and display spatial data (where things are) and attribute data (what things are) in a digital format. Why is a Constraints Map Important to OPTI/Nexen?
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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 | 0,001 | 0,001 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,002 | 0,002 |
| Études des sciences et des technologies | 0,002 | 0,001 |
| Communication savante | 0,001 | 0,001 |
| Science ouverte | 0,001 | 0,001 |
| Intégrité de la recherche | 0,001 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,008 | 0,001 |
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 ».