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UK Central North Sea

Viaro Energy currently holds non-operated interests in 6 UK Central North Sea oil and gas fields. Its assets include the producing Arran, Nelson & Howe, and Blake & Ross fields, as well as the Tain exploration opportunity.

Arran Field

The Arran gas condensate field is operated by Shell as a 60-kilometre subsea tie-back to the Shearwater platform. Hydrocarbons are processed on and then exported from the platform, with gas joining the SEGAL system and condensate the Forties pipeline system. Discovered in 1985 as two separate structures, Arran came onstream in 2021.

  • 30.43%

  • Onstream

  • Arran is located 240 kilometres east of Aberdeen, close to the UK/Norway median line, in a water depth of 85 metres.

  • Arran is estimated to have long-term potential in terms of recoverable gas reserves. RockRose Energy invested $120 million in the development of the Arran field in 2018, recently investing in a success infill well and working closely with the operator to develop further upside.

  • ~4,800 boepd net to RockRose in 2023

Nelson & Howe Fields

The Nelson & Howe oil fields are operated by Shell. Developed with a fixed platform, Nelson produces light oil from a reservoir at a depth of approximately 2,200 meters. The smaller Howe field was brought onstream as a single-well subsea tie-back to the Nelson platform. The oil from the platform is transported by pipeline to the Forties field and then to shore via the Forties pipeline system.

  • 7.48% (Nelson); 20% (Howe)

  • Onstream

  • Nelson is located approximately 200 kilometres northeast of Aberdeen in a water depth of 88 metres. Howe is located 14 kilometres east of the Nelson field, in a water depth of around 90 metres.

  • Viaro continues to work closely with the operator to look at life extension opportunities.

  • ~800 boepd net to RockRose in 2023

Blake & Ross Field

The Blake & Ross oil fields, operated by Repsol Sinopec, produce into the Bleo-Holm Floating Production, Storage & Offloading (FPSO) vessel via subsea infrastructure. The Ross field is currently offline, while oil from the Blake field is produced via a subsea manifold and dual flowlines to the Ross FPSO. Blake is divided into two areas – the Blake Channel and the Blake Flank. The two were developed separately, with 6 production wells and 2 water injection wells drilled into the Blake Channel, and 2 production wells drilled into the Blake Flank.

  • 30.82%

  • Onstream

  • Blake is located around 120 kilometres northeast of Aberdeen in a water depth of approximately 110 meters.

  • The Blake field has been producing oil since 2001, while Ross began production in 1998.  Viaro is working closely with the operator to extend the production life of these mature oil & gas fields.

  • ~2,400 boepd net to RockRose in 2023

Tain Field

Tain is an appraised and tested oil accumulation operated by Repsol-Sinopec. Current plans involve developing the Tain field with two wells, tied back to the Bleo Holm FPSO vessel. Produced oil will be exported by shuttle tanker, while excess gas will be exported via the Frigg pipeline.

  • 50%

  • Pre-development appraisal

  • Tain is located 10 kilometres northwest of the Blake field, in a water depth of around 100 metres.

  • Once development studies are completed, the project is expected to reach the Final Investment Decision by the end of 2023, with first oil in 2025. Peak production is expected to exceed 6,000 boepd.

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