Star Energy provides a complete, end-to-end geothermal delivery model, covering every stage of project development from early feasibility through to long-term operation and performance monitoring. This turnkey approach ensures that each project is developed with full technical continuity, reducing risk, improving efficiency and maintaining alignment between subsurface design and surface energy delivery.
Our service offering is built on decades of subsurface engineering experience, combined with a detailed understanding of UK geology, regulatory frameworks and heat network integration. Each project is approached as a fully integrated system, where geological conditions, engineering design and end-user demand are considered together from the outset.
Feasibility Studies and Resource Assessment
Every geothermal project begins with a detailed geothermal energy feasibility study. At this stage, we assess the technical and commercial viability of a potential development by analysing geological data, subsurface temperature gradients and reservoir characteristics. This includes interpretation of historic well data, regional geological models and, where available, seismic datasets. We evaluate the presence of permeable formations, expected reservoir temperatures and potential flow rates to determine whether the subsurface resource can support a sustainable geothermal system.
In parallel, we assess local heat demand to ensure that the energy produced can be utilised efficiently. Matching the geothermal resource to a consistent and reliable heat load is a critical component of project viability.
Geological Modelling and Subsurface Design
Following feasibility, detailed geological and reservoir modelling is undertaken. This work defines the structure, depth and properties of the target formation and supports the design of the geothermal well system. Reservoir simulations are used to predict long-term performance, including thermal behaviour, pressure response and flow sustainability. These models inform well placement, spacing and orientation, ensuring that the system is designed to avoid thermal breakthrough and maintain stable output over its operational life.
Our subsurface design process integrates geological interpretation with engineering requirements, providing a robust foundation for subsequent drilling operations.
Planning, Permitting and Consents
Geothermal developments require a range of regulatory approvals, and Star Energy manages this process as part of its turnkey service. We support planning applications, environmental permitting and engagement with relevant regulatory bodies.
This includes preparation of environmental assessments, groundwater considerations and compliance with Environment Agency requirements. Early engagement with regulators helps to streamline approvals and ensure that projects are developed in line with best practice and regulatory expectations. Our experience in managing complex permitting processes allows projects to progress efficiently while maintaining full compliance.
Well Design and Drilling
Well design and drilling are central to geothermal project delivery. Star Energy applies established oil and gas engineering practices to the design and construction of geothermal wells, ensuring safe and effective access to subsurface heat resources.
Wells are typically drilled to depths between 2,000 and 5,000 metres, depending on the target reservoir. Detailed well designs include casing programmes, materials selection and completion strategies tailored to the temperature, pressure and chemical composition of geothermal fluids.
We manage drilling operations from contractor selection through to execution, overseeing all aspects of well construction, testing and completion. Directional drilling techniques are used where required to maximise reservoir contact and optimise system performance.
Surface System Design
Once the subsurface system has been defined, we design the surface infrastructure required to extract, transfer and distribute heat. This includes heat exchangers, pumping systems, reinjection equipment and control systems. Surface system design is closely integrated with the requirements of the end user, whether this is a district heating network, industrial facility or large building complex. We ensure that the geothermal system is configured to deliver heat efficiently and reliably under varying demand conditions.
Where necessary, systems can be designed to incorporate thermal storage or heat pump integration to optimise performance.
Construction Management and Installation
Star Energy provides full construction management services, overseeing the installation of both subsurface and surface components. This includes coordination of contractors, management of project timelines and assurance of quality and safety standards.
Installation activities cover wellhead equipment, pipework, heat exchangers, pumps and connections to heat distribution networks. Our approach ensures that all elements of the system are installed in accordance with design specifications and operational requirements.
Commissioning and Handover
Following construction, we manage the commissioning process to ensure that the geothermal system operates as intended. This involves testing all components, verifying system performance and confirming that heat delivery meets design expectations. Commissioning includes validation of flow rates, temperature outputs, reinjection performance and control system functionality. Once complete, the system is handed over for operational use, with full documentation and performance benchmarks established.
Operations and Maintenance
Star Energy provides ongoing operations and maintenance services to ensure long-term system performance. Geothermal systems are designed to operate over several decades, and effective maintenance is essential to sustain efficiency and reliability. Our operations teams monitor system performance, manage routine maintenance activities and respond to any operational issues. This includes pump maintenance, monitoring of well conditions and optimisation of system performance based on real-time data.
Performance Monitoring and Optimisation
Continuous performance monitoring is a key component of our service offering. Using data from both subsurface and surface systems, we track key performance indicators such as flow rates, temperatures and energy output. This data allows us to identify trends, optimise system operation and ensure that the geothermal resource is being utilised efficiently. Where necessary, adjustments can be made to operating conditions to maintain performance and extend the lifespan of the system.
A Fully Integrated Approach
By providing a complete turnkey solution, Star Energy ensures that geothermal projects are delivered with a consistent and integrated approach from start to finish. Each stage of development is aligned with the next, reducing technical risk and improving overall project outcomes. This end-to-end capability allows us to take geothermal projects from initial concept through to long-term operation, delivering reliable and sustainable heat solutions tailored to the needs of each site.