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Concept and Feasibility Studies

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Concept Definition provides the link between field development planning and FEED. A single, well defined option is selected to complete the conceptual phase. 

Concept Definition, or pre-FEED, adds a further level of detail to the option selected at the conclusion of Concept Select to achieve more precise definition, a better cost estimate and, ultimately, a scope of work for FEED

The scale of a Concept Definition or pre-FEED phase can vary dramatically depending on the nature of the project.  Regardless of scale, the 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 e.g. technology selection  

  • Finalisation of field architecture 

  • Preliminary P&ID 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 

  • FEED Scope of Work 

As a result, the development enters FEED with a well-defined option in which:  

  • Major design decisions have been made;  

  • Risks and uncertainties are understood and mitigated where appropriate;  

  • The execution approach, cost estimate, budgets and schedules are clear and complete.