Summary
- Orcadian has begun the assessment phase for the Earlham and Orwell gas field developments on licence P2680.
- The preferred concept would supply an offshore power station with carbon capture and a co-located 200MW data centre hall.
- The early-stage proposal joins UK grid constraints, AI power demand, offshore engineering, and carbon capture into one infrastructure concept.
Orcadian Energy has proposed using North Sea gas fields to power an offshore data centre, setting out a development concept that would combine gas-to-wire generation, carbon capture, CO₂ reinjection, and a 200MW data hall separate from the UK grid.
The company has begun the assessment phase for the Earlham and Orwell gas field developments on licence P2680 and intends to prepare a Concept Select Report. Its current preferred scheme would develop the fields to supply an offshore power station at Earlham, with the power station equipped to capture carbon dioxide and reinject it into the Earlham reservoir.
Orcadian’s development concept includes a platform complex capable of supporting a 200MW offshore data centre hall. The company says a first phase could support around 200MW of IT load, with a longer-term strategy potentially installing multiple power station and data centre halls to provide more than 1GW of dispatchable low-carbon power.
Moving compute to the power source
The project is early-stage and remains subject to several approvals. Orcadian says the current intention depends on North Sea Transition Authority approval for licence assignment, a letter of no objection to the selected development concept, and further consents, including any required carbon storage licence. The company is also establishing Earlham Gigagrid Ltd to incubate the project and allow third-party investment.
The concept reverses the conventional siting problem. Instead of bringing a very large power connection to an onshore data centre campus, the data centre would be placed next to a dedicated offshore power station. Orcadian argues that offshore siting would reduce planning opposition, provide access to seawater as a heat sink, and avoid adding stress to transmission and distribution networks.
The platform complex would include a wellhead structure, power station platform, and data centre platform, according to the company’s preferred concept illustration. Orcadian expects ultimate developers or investors in the power station and data centre facilities to come from hyperscalers or specialist AI infrastructure providers.
Gas transition meets the grid queue
The proposal lands in the middle of the UK data centre power debate. AI and cloud demand are increasing large-load connection requests, while developers face queue delays, substation constraints, and political pressure over reinforcement costs. A self-contained offshore facility would avoid parts of that conventional connection process, although it would introduce a different set of engineering and regulatory challenges.
Offshore construction, turbine selection for low-calorie gas, carbon capture integration, reservoir management, marine operations, fibre connectivity, emergency response, and maintenance logistics would all have to work together. Data centres are designed around continuous availability, while offshore oil and gas assets are designed for harsh environments, compact layouts, and specialised access. Combining the two would require a resilience model that satisfies both worlds.
The carbon case also needs careful treatment. Orcadian says Earlham gas contains 49% carbon dioxide, and that the reservoir’s geology demonstrates its ability to retain CO₂ over geological time. The proposed scheme would capture carbon dioxide from power generation and reinject it into the reservoir. The final emissions profile would still depend on capture performance, methane leakage, offshore operations, backup systems, lifecycle assumptions, and regulatory treatment.
The proposal shows how far the search for data centre power is moving beyond ordinary procurement. Developers and investors are already exploring behind-the-meter generation, renewable co-location, gas engines, battery-backed campuses, nuclear partnerships, constrained-grid siting, and power-first land strategies. Orcadian’s offshore concept adds another model, built around an energy asset whose conventional development route is limited by gas composition and export economics.
Offshore siting would also change data centre geography. Conventional decisions depend on land, power, fibre, latency, customer proximity, tax, and planning. Offshore facilities add marine access, subsea connectivity, platform safety, weather windows, logistics, and overlap with oil and gas regulation. Such a model would be more suited to workloads that can tolerate distance from users, such as some AI training, rather than latency-sensitive applications.
Orcadian has not reached final investment decision, named a data centre tenant, or secured the full permitting pathway. The concept is still notable because it brings together three difficult UK infrastructure questions: how to monetise discovered gas, how to power AI growth, and how to avoid worsening grid congestion. The next test is whether the proposal can move from concept logic to buildable, bankable, and licensable infrastructure.
