Notice bibliographique
Résumé
Abstract Nearly all of Husky's SAGD projects in the Lloydminster, Saskatchewan area are in reservoirs with bottom water. While operating several projects in this region, Husky observed that in some reservoir settings the outer SAGD pair had significantly decreased performance compared to inner SAGD pairs. When the outer pair was shut in to improve overall pilot performance, the performance of now exposed adjacent pair rapidly decreased. It was hypothesized that operating the edge pairs protected inner pairs from the detrimental effects of the bottom water. Numerical simulation runs have confirmed this behavior. The conclusions reached are that in many bottom water settings poorer performing edge SAGD pairs protect and preserve the performance of inner SAGD pairs; and this should be taken into consideration during facilities design, operational strategy design, and production forecasting. Introduction Use of SAGD is now being expanded to reservoirs with non-ideal conditions, including those in which active bottom water is present. This expanded application entails climbing a earning curve using both numerical simulation and field trials to improve performance. In the Lloydminster, Saskatchewan area, an additional factor is the presence of mobile oil, which has less ability to contain the movement of both injected steam and bottom water. As a result, bottom water influx may be more difficult to control than it is where more viscous oil is present. A manifestation of the greater difficulty to control bottom water when mobile oil is present is poorer performance of the outer SAGD pairs that are exposed to both bottom water and edge water influx. Field Data The field data used are from Husky's Pikes Peak and Pikes Peak South projects. Pikes Peak South As shown in Figure 1, when the outer SAGD pair was shut in, the performance of the next SAGD pair immediately dropped. Also shown in Figure 1 is the rapid recovery of performance of the inner SAGD pair when the outer SAGD pair was returned to injection and production. Numerical Simulation Basic Properties Numerical simulation for a simplified generic study of the behavior of outer and inner SAGD pairs in the presence of bottom water was initiated using CMG STARS software. As shown in Figure 2, the model contains an outer pair and an inner pair over bottom water with recharge. The numerical model was used to determine the optimum operating strategy for the outer pair. Conclusions Although field data are limited, the data that are available show the performance of outer SAGD pairs over bottom water in Lloydminster, Saskatchewan area channel sand reservoirs with mobile oil exhibit generally poorer performance than interior well pairs. If the underperforming outer SAGD pair is shut in, the ‘new’ outer SAGD pair will under perform. Runs using a simplistic numerical model of two SAGD pairs also illustrate the ability of an outer SAGD pair to protect an inner SAGD pair from the performance reducing effects of bottom water.
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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 | 0,000 |
| 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) | 0,001 | 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 ».