Concept Definition (Pre-FEED)

Concept Definition provides the link between Field Development Planning and FEED. A single, well defined option is selected to complete the Create phase.

Concept Definition schematics

Concept Definition, or Pre-FEED, adds a further level of detail to the short listed options identified in the field development planning phase to achieve more precise definition, a better cost estimate and, ultimately, selection of a single option for FEED.

Activities in Concept Definition are chosen to address the development's circumstances and can include:

  • Process scheme optimisation
  • Reduction in optionality using targeted studies of particular aspects of design
  • Finalisation of field architecture
  • P&ID initial development
  • Layout development
  • Issue of enquiries for long lead or high cost items
  • Cost estimating and economic assessment
  • Project schedule enhancement
  • Preparation of survey scopes of work, tendering and management of the work
  • Engagement with other work groups and third parties to reduce uncertainties e.g. drilling, reservoir engineering, tie-ins to other facilities, regulatory authorities, buyers of products.
  • Development of risk mitigation plans
  • Project Execution Plan and contracting strategy finalisation
  • Basis of design update
  • Commencement of the ESIA process

As a result, the development enters FEED with a single, well defined option. The development's major design issues have been decided; risks and uncertainties are understood; the cost estimate, budgets and schedules are clear and complete.