Generated by the worldenergydata field-development playbook (epic #567). Recommendation is heuristic (Concept Select / FEL-1 fidelity), not a sanctioned design.
Tobago is a small, ultra-deepwater accumulation in ~2,925 m of water that could never justify a dedicated floater, so it was developed as a subsea tieback to the regional Perdido spar in AC857, which gathers Great White, Silvertip and Tobago within a ~15 km radius. The Perdido host uses a direct-vertical-access spar with subsea caisson separation and electrical submersible pumping to lift low-energy Lower Tertiary fluids up ~2.4 km of riser; Tobago's wells feed that shared infrastructure rather than carrying their own trees to surface. Reservoir distribution and very low column energy at this depth favored wet-tree subsea wells boosted to the host over any standalone concept. The 2010 Tobago well set a world water-depth record for a subsea oil and gas well at 9,627 ft. Notable: World's deepest offshore oil and gas well at startup (9,627 ft / ~2,934 m), tied to the world's deepest production spar (Perdido).
| Concept | Score | Trees | Rationale / flags |
|---|---|---|---|
| subsea_tieback ★ | 0.847 | wet | host within 60 km with spare capacity |
| subsea_to_shore | 0.734 | wet | — |
| fpso | 0.688 | wet | — hurricane regime: FPSO needs a disconnectable turret |
| flng | 0.622 | wet | — |
★ = the concept actually selected for this field (where known).
Sources: SubseaIQ field catalog (~2014) + BSEE + curated vessel/ subsea catalogs. Schematics are deterministic, generated from the field concept.