The Dons area consists of the Don Southwest, West Don, Conrie and Ythan oil fields. The fields are located in the Northern North Sea area of the UK Continental Shelf, approximately 150km northeast of the Shetland Islands, in water depths of approximately 558 feet (170m). All the fields produce from the Brent reservoir sequence sandstones.
Ithaca Energy acquired its interests in the Dons oil fields in Block 211/18a and B through the acquisition of the UK-listed company Valiant Petroleum plc in April 2013.
The Don Southwest field is a re-development of part of the former Don field that was discovered in 1976 and first oil from the re-development was achieved in April 2009. EnQuest operates Don Southwest (60%), with Ithaca Energy holding a 40% non-operated working interest.
West Don was discovered in 1976. The discovery was put into production as part of the Don Southwest re-development, with first oil also achieved in 2009. EnQuest also operates West Don (78.6%), with Ithaca Energy holding a 21.4% non-operated working interest.
The Conrie field was discovered by EnQuest in January 2011, with first oil achieved in the same year. The field has been developed by one subsea production well, which is now operated on a “swing” basis as reservoir pressures permit.
The Ythan field was developed in 2015 as a single well tieback via existing Don Southwest infrastructure. Production commenced in May 2015 from both Brent and Statfjord reservoirs.
The Don Southwest and West Don field developments consist of subsea production wells, supported by water injectors. The wells are tied back to the “Northern Producer” floating production facility, from which oil is exported via the EnQuest operated Thistle platform and onwards through the Brent System pipeline to the BP operated Sullom Voe oil terminal in the Shetland Islands.