Generated by the worldenergydata field-development playbook (epic #567). Recommendation is heuristic (Concept Select / FEL-1 fidelity), not a sanctioned design.
Julia is a Lower Tertiary (Wilcox) accumulation spread across five Walker Ridge blocks in ~2160 m of water; rather than build a dedicated floating host for a relatively thin, low-permeability Wilcox reservoir, ExxonMobil developed Phase 1 as six subsea wet-tree wells tied back ~24 km (15 mi) to the existing Chevron-operated Jack/St. Malo semisubmersible, sharing that host's processing capacity. The long ultra-deepwater tieback of low-GOR Wilcox oil demands active flow assurance (insulation, hydrate/asphaltene management) and high-pressure boosting given tight rock and high reservoir pressures. Sharing Jack/St. Malo avoided the capital and metocean exposure of a standalone facility in this remote area. Notable: Subsea tieback of a Lower Tertiary field to the neighboring Jack/St. Malo semi rather than a standalone host.
| Concept | Score | Trees | Rationale / flags |
|---|---|---|---|
| subsea_tieback ★ | 0.847 | wet | host within 60 km with spare capacity |
| semisub_fps | 0.746 | wet | — |
| subsea_to_shore | 0.734 | wet | — |
| spar | 0.724 | dry | — |
| fpso | 0.688 | wet | — hurricane regime: FPSO needs a disconnectable turret |
★ = 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.