Field Development Plan — Cheyenne

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 (Subsea To Shore) differs from the concept actually built (Semisub Fps). 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
2739.0 m
Concept
semisub_fps
Fluid
gas
Operator
Anadarko
Wells
Plateau
Tieback
First oil

Recommended concept shortlist

ConceptScoreTreesRationale / flags
subsea_to_shore0.688wet
fpso0.602wetatypical concept for gom
flng0.531wetatypical concept for gom

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

Economics & execution (engine estimate)

Dev system
subsea20
Est. CAPEX
450.0 $MM
Est. NPV
Install vessels
8
Max crane
5000.0 t
Hardware
RJ-08-HYD-15K

As built (actuals)

Block
Lloyd Ridge 399
BSEE code
LL399
Operator
Anadarko
Concept (as built)
Semisub Fps
Engine top pick
Subsea To Shore
Match
✗ differs

Architecture & layout (semisub_fps)

Subsea architecture — Cheyenne flowline umbilical jumper control jumper control jumper control jumper control export Export SEMISUB FPS Manifold 1 XT 1 XT 2 XT 3 XT 4
Subsea architecture block diagram
Field layout — Cheyenne Subsea manifold Manifold 1 Subsea tree (wet XT) XT 1 Subsea tree (wet XT) XT 2 Subsea tree (wet XT) XT 3 Subsea tree (wet XT) XT 4 Semisubmersible FPS SEMISUB FPS 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.