A Qualified UKCS Operator:

Existing technical and operational resources with UKCS delivery experience.


Bentley Field:

Whalsay Energy is the 100% Licence Holder of P.1078, containing the Bentley field.

Bentley, located in Block 9/3b, 150km east of the Shetland Islands, is one of the largest undeveloped oil fields in the UK North Sea.


Key Features:

  • Bentley, discovered in 1977, has undergone a structured appraisal process including an Extended Well Test in 2012.
  • Large four-way dip-closed structure with an excellent quality Dornoch Formation reservoir containing heavy oil (10°-11° API).
  • Delineated by seven wells, of which three are geo-steered horizontal penetrations.
  • Estimated 912 MMstb (P50) oil in place.


Independently-verified development solution

Since mid-2017, Whalsay Energy has been using an industry standard Front-End-Loading process to develop a technically credible and cost effective phased development solution, with a life-cycle cost of less than $33 per barrel.


The first phase of the development targets 112 MMstb of P50 reserves over a 23-year period from the core area of the field, where there is the greatest well control and least reservoir uncertainty.


Data from the first phase will form the foundation of an ongoing appraisal process for future phases to maximise the overall economic recovery of the field.


Key achievements since licence extension

  • Secured a four-year extension to the Bentley licence until 30 June 2021.
  • Developed a Bentley field subsurface case with verification by independent technical authorities.
  • Developed a technically credible and conventional Bentley field development solution which defines and demonstrates the economic viability of the project by using an industry standard FEL approach, with verification by independent technical authorities.
  • Delivered the Bentley field licence extension milestones, MER UK obligations and demonstrated effective Asset Stewardship.
  • Successfully completed the P&A of all remaining Bentley field wells using a cost effective offshore solution.