Field Development Plan — Longhorn (aka Leo)

Generated by the worldenergydata field-development playbook (epic #567). Recommendation is heuristic (Concept Select / FEL-1 fidelity), not a sanctioned design.

Engineering rationale

The engine's top recommendation (Tlp) differs from the concept actually built (Fixed Jacket). The recommendation is produced on a blind probe (the as-built concept stripped before scoring); the shortlist below shows where the built concept ranks. Divergence is expected where the real choice turned on data outside the engine's inputs (reserves, schedule, operator preference).

Field parameters

Water depth
740.0 m
Concept
fixed_jacket
Fluid
oil
Operator
Noble Energy
Wells
Plateau
Tieback
First oil

Recommended concept shortlist

ConceptScoreTreesRationale / flags
tlp0.783drytypical of gom development practice
spar0.694drytypical of gom development practice
subsea_to_shore0.688wet
semisub_fps0.662wettypical of gom development practice
compliant_tower0.661dry

★ = the concept actually selected for this field (where known).

Economics & execution (engine estimate)

Dev system
subsea15
Est. CAPEX
300.0 $MM
Est. NPV
Install vessels
34
Max crane
14200.0 t
Hardware
MC-CH-R4-120

As built (actuals)

Block
Mississippi Canyon 546
BSEE code
MC546
Operator
Noble Energy
Concept (as built)
Fixed Jacket
Engine top pick
Tlp
Match
✗ differs

Architecture & layout (fixed_jacket)

Subsea architecture — Longhorn (aka Leo) TTR riser TTR riser TTR riser TTR riser export Export FIXED JACKET Well 1 Well 2 Well 3 Well 4
Subsea architecture block diagram
Field layout — Longhorn (aka Leo) Fixed jacket platform FIXED JACKET Dry tree / surface wellhead Well 1 Dry tree / surface wellhead Well 2 Dry tree / surface wellhead Well 3 Dry tree / surface wellhead Well 4 Export Export N 1 km
Plan-view field layout (to scale)

Sources: SubseaIQ field catalog (~2014) + BSEE + curated vessel/ subsea catalogs. Schematics are deterministic, generated from the field concept.