UK Southern North Sea

Through its operating subsidiary RockRose Energy, Viaro has interests in several producing fields in the Southern Gas Basin of the UK North Sea. Interests in Tors, Grove, and Seven Seas were purchased from Sojitz Energy in 2017. In 2021, Viaro Energy acquired SSE E&P gas assets, which included interests in the Bacton Catchment Area, the Easington Catchment Area, and the Sean Field System. In 2023, Viaro Energy completed a farm-in agreement with Hartshead Resources Ltd., whereby subsidiary RockRose Energy will be the operator of the Anning and Somerville fields.

Bacton Catchment Area (BCA)

The BCA comprises 11 gas fields operated by Perenco UK, 7 of which are producing fields. The 2 main fields in the BCA are Leman and Indefatigable, which began production in 1969 and …and 1971, respectively. The development of smaller associated fields began in 1993 and is largely conducted through the 2 main fields. RockRose Energy holds non-operated interests in the Bell, East and South Leman, Indefatigable (including Indefatigable SW), Davy and North Davy, Boyle, and Browne fields.Out of the 6 smaller fields produced through the Indefatigable facility, the gas from the 4 RockRose assets (Davy, North Davy, Browne, and Boyle) is delivered via the Davy platform and flowed back to Indefatigable. Gas from Bell is produced via the abandoned Bessemer platform and flowed back to Indefatigable. The Indefatigable field has been developed with 4 platforms and 40 wells, and its gas is transported to the Leman 27B platform via a pipeline. Leman gas is produced through the Leman facilities and transported to the Bacton Terminal via a pipeline.
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Equity
35.10% (Bell); 21.70% (Leman fields); 23.10% (Indefatigable fields); 27.78% (Davy fields); 27.80% (Boyle); 27.50% (Browne); 22.19% (Bacton Terminal); 9.84-13.67% (Inde/Leman Joint Compression Pipeline)
Status
Onstream
Location
The BCA is located in the Southern North Sea, off the coast of Norfolk.
Potential
Viaro Energy acquired interests in several BCA fields in 2021, as part of its long-term strategy to support life extension initiatives for mature gas assets in the North Sea. Considering the age of the infrastructure, the operator initiated the Southern Hub Asset Rationalisation Project (SHARP), a strategic investment project designed to extend the economic production life of the existing Leman and Indefatigable gas fields. The assets are being modified to become Normally Unmanned Installations, and redundant facilities are planned to be removed, thereby delivering a more efficient and cost-effective production operation.
Latest Production Results
~1,900 boepd net to RockRose in 2023
Easington Catchment Area (ECA)

RockRose Energy has interests in 6 gas fields that comprise the ECA and include Apollo, Minerva, Whittle, Eris, Wollaston, and Mercury. All fields are operated by Perenco UK, except …Eris, whose operator is Spirit Energy. Gas from these ECA fields, as well as several other non-equity fields, is combined at the Cleeton Platform and exported via a 36-inch gas pipeline to the Dimlington Gas Terminal.
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Equity
50% (Apollo, Minerva, Mercury); 46% (Eris); 33.70% (Whittle); 33.50% (Wollaston)
Status
Onstream
Location
The ECA lies between 40 and 50 kilometres off the Yorkshire coast.
Potential
Viaro Energy’s 2021 investment in the ECA gas fields has supported the extension of their economic production life. As most ECA fields are mature, the operators are committed to minimising greenhouse gas emissions through adherence with industry best practices and use of advanced technology. This will enable ECA fields to continue producing gas in the years to come.
Latest Production Results
~3,000 boepd net to RockRose in 2023
Sean Field System

The Sean area consists of the Sean North, Sean South, and Sean East fields, operated by ONE Dyas. The fields are part of the BCA and consist of 3 surface-breaking structures through Se…an Papa: 2 bridge-linked platforms – a wellhead and compression platform (PD) and a production and accommodation platform (PP) – and Sean Romeo (RD), a Not Permanently Attended Installation (NPAI). RD is connected to PP through a 20-inch infield duplex flowline (PL310). The Sean Field System has produced gas from 10 wells on Sean PD and 6 wells on Sean RD. Gas from Sean is transported through a 106.502 kilometre-long and 30-inch-wide gas export pipeline to the Bacton Terminal (PL311 trunkline).
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Equity
50% (Apollo, Minerva, Mercury); 46% (Eris); 33.70% (Whittle); 33.50% (Wollaston)
Status
Onstream
Location
Sean lies approximately 94 kilometres east of the UK coastline and 15 kilometres from the UK/Netherlands border.
Potential
Viaro Energy acquired an interest in the Sean field system in 2021 as part of the SSE acquisition. Sean has been a reliable source of domestic gas for decades, with Sean North and South fields beginning production in 1986, and Sean East in 1994. The partnership are now moving the asset toward decommissioning.
Latest Production Results
~1,400 boepd net to RockRose in 2023
Anning and Somerville Fields

Anning and Somerville are gas development fields acquired by Viaro Energy in 2023, as part of a farm-in agreement with Hartshead Resources. Viaro Energy will assume operatorship of th…e fields prior to first gas, marking the company’s first operator role. The Concept Select determined that 2 x NUIs will be installed (1 at each field) utilising a low-emission power generation technology with a tie-back to an existing host platform.
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Equity
60%
Status
Pre-development appraisal
Location
The fields are located in the Southern North Sea, approximately 29 kilometres from the Inde field and 55 kilometres from Sean.
Potential
Concept Selection is anticipated Q4 2024 with FID to be reached within the next 12 months. A clear and credible fiscal regime is critical for this project.
As part of the Phase 1 Development, the potential of the two fields is estimated at net resources (2P+2C) of 30+MMboe, with further Development Phases planned.

Other Operations…

UK Central North Sea

UK Northern North Sea

West of Shetland

The Netherlands