Seabed preparation design and construction for the Malampaya phase 3 depletion compression platform
Notice bibliographique
Résumé
The Depletion Compression Platform (DCP) was conceived by Shell Philippines Exploration B.V. (SPEX) to provide additional gas compression to account for the future expected decrease in well pressure from the Malampaya field. The Malampaya project is very important to the ongoing prosperity of the Philippines, with the exported gas feeding three power stations which have a combined output providing up to 45% of the power needs of Luzon, the largest and most populous island in the Philippines. \nDuring the concept phase of the project SPEX selected Arup’s ACE Gravity Base Structure (GBS) as the substructure solution for the DCP. The DCP substructure was designed to be supported on four linked regular hexagonal pad footings with dimensions of 18 m x 20.8 m x 4m deep. These pad footings were founded on individually prepared support pads composed of engineered rock fill material of approximately 1 m in thickness. \nIt is standard practice to include a larger sized scour blanket around the footing perimeter to prevent local erosion, undermining and loss of support. However, during design development we were challenged by the project team to omit this element altogether by selecting a founding engineered rock fill material which was itself suitably sized to prevent scour. \nGiven there is no analytical approach available to accurately determine the local flow enhancement around the apices of the individual hexagonal pad footings at seabed level, Computational Fluid Dynamics (CFD) modelling and Wave Tank Testing (WTT) were employed. The effect of the existing adjacent Concrete Gravity Structure (CGS) was also considered as part of this assessment. The results of the CFD modelling and WTT was used to calculate a minimum size range for the engineered rock fill which is capable of resisting the enhanced flow velocities in the 100-year return period cyclonic storm event. \nFollowing calculation of the required size of engineered rock fill material, this information was presented to the potential seabed preparation Contractors for agreement on the achievable surface profile. The agreed local surface profile of the seabed preparation support pads was then used to assess the structural performance of the pad footing. Once structural performance was shown to be adequate this confirmed that the dedicated larger sized scour protection layer could be omitted. This yielded savings to the project by minimising material procurement, vessel modification and offshore working time. \nThe construction of the seabed preparation support pads using the larger sized engineered rock fill was performed successfully within the tolerances established and agreed through early consultation with the potential seabed preparation Contractors.
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) | 0,000 | 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) | 0,000 | 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 ».