neqsim-subsea-slot-tee-reuse-inventory

Subsea slot, tee and reusable-line inventory

Answers "what can we plug into, and is it better than a new line?" before a tie-in study. It keeps four things apart that are usually mixed: what exists (inventory), whether it is free (status + verification), whether it works for this fluid and rate (capacity, hydraulics, compatibility) and whether it lasts the horizon (lifetime action).

When to Use

• A discovery, satellite or infill target needs a tie-in point: which templates/manifolds have free slots, which tees or hubs are spare, which lines are spare, abandoned or could be re-purposed.
• A host wants more production from existing assets: gas lift through an existing line, converting an injection line, re-routing or looping, adding wells on free slots, using a spare umbilical core for chemical/MEG supply.
• Reuse must be compared with a new-build tie-back on distance, capacity, arrival pressure, flow-assurance compatibility, remaining life and cost class.
• The result must be handed to export-tie-in-concept-agent, surf-design-study, tie-in-screening-agent or an area-development study.

Inputs

• Inventory JSON (neqsim.subsea_infrastructure_inventory.v1, schema in data/subsea_infrastructure_inventory.schema.json): per item id, kind (host, template, manifold, slot, tee, hub, plet, plem, well, pipeline, flowline, riser, j_tube, riser_slot, umbilical, umbilical_core, spool, gas_lift_line, injection_line, meg_line, chemical_line, cable), status (in_use, spare, abandoned, planned, unknown), service, size_in, pressure_rating_bar, length_km, fluid, capacity, install_year, design_life_years or remaining_life_years, condition, total_slots/free_slots, hub_type, position {lat, lon}, connects, repurpose_option, source, verification (measured, documented, estimated, unknown).
• Open data: Sodir facilities, pipelines, wells (items_from_sodir). Sodir does not publish free slots or spare lines: slots come out estimated, nothing is called spare.
• Target: position, host position, service, rate and unit, source pressure, minimum arrival pressure, design pressure, horizon end year, fluid flags (wax, hydrate_prone, h2s_ppm).