Field Development Plan — Jack/St. Malo
Summary
Two fields share a semisubmersible host through subsea completions; the source reports startup in December 2014.
Historical source snapshot, not a current operating-status assertion or a sanctioned engineering design. Missing inputs are preserved as unknown.
Revision history
| Revision | Date | What changed and why |
|---|---|---|
| Initial | 2026-10-19 | Documented the reported development concept and evidence gaps to provide a field-level portfolio reference. |
| 1 | 2026-10-20 | Formatted whole-number inputs without decimal padding for readability. |
Engineering rationale
The co-development places the floating production unit between the fields and routes subsea production to a shared processing facility. The source also describes seafloor boosting. Shared-host capacity is not allocated to either field here.
Field parameters
| Input | Value | Source and scope |
|---|---|---|
| Operator at source date | Chevron | S1: Opening announcement names Chevron as operator. |
| Reported development concept | semisub_fps | S1: Co-development paragraph identifies the single semi-submersible host and subsea completions. |
| Host | Shared semisubmersible floating production unit | S1: Shared host sits between the fields; no per-field host split is assigned. |
| Water depth (m) | Unknown | Required input; not established by the cited evidence. |
| Wells (scope stated below) | Unknown | Required input; not established by the cited evidence. |
| Designed peak capacity (boe/d) | Unknown | Required input; not established by the cited evidence. |
| Reported oil capacity (bbl/d; not a boe/d plateau) | 170000 | S1: Shared FPU capacity is 170,000 bpd; not the separate first-stage ramp-up rate and not an individual field plateau. |
| Recoverable resources (MMboe) | Unknown | Required input; not established by the cited evidence. |
| Actual first-oil year | 2014 | S1: Article dated December 2, 2014 reports production has started. |
Architecture
Jack and St. Malo subsea completions feed the shared floating production unit. The source does not establish a complete well and manifold inventory or measured connection lengths.
Well coordinates, manifold counts and interconnection lengths are required inputs for a detailed layout. Layout: NOT_EVALUATED; no assumed geometry is drawn.
Recommended concept shortlist
NOT_EVALUATED. The reported concept is documented above; a comparative ranking requires sourced screening limits and criteria weights.
Economics and execution
NOT_EVALUATED. No cost or investment return is inferred from facility capacity. Required inputs include scope-matched capital cost, operating cost, production profile, prices, discount rate and schedule. Equipment qualification and installation feasibility also require project-specific design evidence.
Known limits and way forward
The published host capacity is distinct from the development-stage ramp-up rate. No current capacity allocation, well inventory, water depth or scope-matched reserves are inferred. Obtain those inputs and a dated operating basis before ranking alternatives or evaluating economics.
Sources
Input citations refer to the source dates below. Capacity, planned well count and forecast startup are not measured production.
- Jack, St. Malo partners announce first oil from deepwater Gulf of Mexico project (2014-12-02; secondary publisher report). Retrieved 2026-10-20T06:51:50.646127+00:00; HTTP 200; SHA-256: 621f3bb94654776468d4a7e4ee8883ce1efa3513712eff3d80187dff6cb3af5b.