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SUBSEA UNIT NAME

This gives the name of the subsea unit. The name generally contains the name of the field on which the units sits as well as information such as manifold or template.

PURPOSE

• PRODUCTION: Unit produces product (see below under product)
  
• INJECTION: Unit present to inject water or gas into reservoir
  
• PRODUCTION/INJECTION:Unit functions in both a production and injection role
  
• OBSERVATION: Unit set to monitor reservoir

PRODUCT

• OIL
  
• GAS/CONDENSATE
  
• OIL/WATER
  
• GAS
  
• OIL/CONDENSATE
  
• GAS/WATER
  
• CONDENSATE
  
• OIL/GAS/ CONDENSATE
  
• WATER
  
• OIL/GAS
  
• OIL/GAS/WATER

WATER DEPTH (M.S.W)

The water depth over the unit in metres

TYPE

• WET Tree is exposed to sea
  
• DRY Tree is enclosed to protect it from seawater
  
• NEUTRABARIC 2 early wells accessible by divers from an adjoining chamber

TEMPLATE

• YES More than 1 well on a template base
  
• NO The well is a single satellite well or one of a cluster around a manifold

NUMBER OF WELL SLOTS

Indicates the number of well slots available on the subsea unit

NUMBER OF WELLS

Indicates the number of wells on the Subsea completion

START-UP DATE/YEAR

Date of first production. For future developments this can alter frequently as plans are changed or delays occur during development.

Note on larger field developments it is likely that the installation or first production dates for subsea completions will be staggered.

WORK OVER

• WIRE LINE In this instance the workover tool can be lowered from surface to operate on SSC. In this instance there need be only one pipeline to or from the SSC.

• THROUGH FLOWLINE This is relatively rare though it may become of use again in deeper waters. Requires a pipeline loop so a tool can be sent from the platform through the valves and then back to the platform

STATUS

• OPERATIONAL: Subsea unit is operating in its designed function.
  
• INSTALLED: Unit is in position but is not functioning.
  
• UNDER DEVELOPMENT: Unit is being constructed but is not yet in place.
  
• FIRM PLAN: Facility is part of development concept for field where development plan (PDO) has been submitted to relevant authority.
  
• PROBABLE: Facility is part of favoured development concept for field at development Planning stage at company level.
  
• POSSIBLE: Unit is part of favoured development concept for field at very early stage of evaluation.
  
• SHUT IN: Unit in place, but production is shut-in at present.
  
• ABANDONED: Production completed, facilities removed but subsea wellhead not removed yet.
  
• REMOVED: Subsea unit has been removed.
  
• DEFERRED: Cancelled project
• SUPPLIED: Supplied to operator but not yet used.

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