GDC Opens Restricted Tender for Menengai Wellbore Scale Services

GDC Opens Restricted Tender for Menengai Wellbore Scale Services

Kenya’s Geothermal Development Company Limited (GDC) has announced a new restricted tender targeting one of the most technically important challenges in geothermal field operations: scale formation and its removal from geothermal wells and formations.

The procurement notice, posted by GDC on 29 September 2026, seeks qualified firms to provide specialized downhole wellbore and formation-scale removal and scaling mitigation services for geothermal wells and reservoirs at the Menengai Geothermal Field.

The planned service period is three years, creating an opportunity for specialized geothermal service companies with experience in downhole intervention, scale management, wellbore remediation and formation-scale mitigation.

According to the notice, interested and qualified firms must submit their full company details and contacts together with their Electronic Government Procurement System (eGP) registration number to GDC before Friday, 2 October 2026 at 4:00 p.m. East Africa Time.

A Specialized Procurement at Menengai

The significance of the procurement lies in the nature of the services being sought.

GDC is not simply seeking general drilling support or conventional equipment supply. The notice specifically identifies wellbore and formation-scale removal and scaling mitigation, indicating a requirement for specialized technical capabilities within the geothermal production environment.

Scale can become a major operational issue in geothermal systems because fluids moving through wells and production infrastructure can undergo changes in pressure, temperature and chemical conditions. These changes can contribute to mineral deposition, potentially affecting wellbore performance and geothermal-fluid flow.

For a geothermal developer, maintaining productive wells is therefore closely connected to long-term field performance.

The new GDC procurement places these activities directly within the operational requirements of the Menengai geothermal resource.

GDC's procurement platform states that the company maintains lists of registered suppliers, contractors and consultants in different categories and may invite them through subsequent procurement processes, including restricted tendering, depending on its procurement needs.

The current notice therefore provides an important signal to companies specializing in geothermal well intervention and scale-management technologies.

Why Menengai Matters

The procurement comes as Menengai continues to develop as one of Kenya's major geothermal fields.

GDC estimates the Menengai geothermal resource could have potential of approximately 1,600 MW. Development began in 2009, while exploration and appraisal drilling have established the foundation for continued field development.

GDC says 53 wells with a potential of 169 MW had been drilled by 2023, while the broader development strategy is structured around five phases with a long-term target of 465 MW of geothermal steam equivalent.

The field is already supporting electricity generation through GDC's steam-sales model.

Menengai Phase I is designed around 105 MW, with GDC supplying geothermal steam to independent power producers that convert the steam into electricity. Sosian Energy's plant has already been synchronized to the national grid, while OrPower Twenty Two's plant was synchronized in March 2026. GDC also issued Full Notice to Proceed to Globeleq Menengai Geothermal Limited in January 2024.

That development means the reliability and productivity of the underlying geothermal resource have increasing commercial importance.

As more wells and steam infrastructure become integrated into power generation, specialized well-maintenance and reservoir-management services can become increasingly important.

The Three-Year Dimension

One of the most notable aspects of the new procurement is the proposed three-year service period.

A multi-year requirement can be particularly relevant to specialist geothermal service providers because downhole intervention is not necessarily a one-off activity.

Geothermal fields evolve as production continues. Well conditions can change, mineral deposition can occur, production characteristics can shift, and operators may require different intervention strategies over the life of a field.

A three-year service arrangement can therefore provide a framework through which specialized expertise is available when required rather than being sourced only after an operational problem has become critical.

For service companies, the opportunity is consequently broader than simply performing a single scale-removal operation.

It potentially involves establishing a sustained technical capability around the Menengai field.

From Scale Removal to Scaling Mitigation

The wording of the GDC notice is particularly important because it refers to both scale removal and scaling mitigation.

These are related but distinct operational requirements.

Scale removal focuses on addressing deposits that have already formed. Depending on the type, location and characteristics of the deposit, intervention may involve specialized mechanical, chemical or other downhole techniques.

Scaling mitigation, on the other hand, is concerned with reducing or managing the conditions that allow problematic deposits to form or accumulate.

The distinction is important because the economics of geothermal production are influenced not only by the ability to restore a well after performance has deteriorated, but also by the ability to maintain reliable flow and minimize operational disruption.

For specialist companies, this means that the GDC opportunity could require a combination of field diagnostics, intervention technology, engineering expertise and monitoring.

The exact technical scope, performance requirements and commercial terms would need to be established from the procurement documentation and subsequent engagement with GDC.

A Growing Geothermal Services Market

Kenya's geothermal sector has increasingly created demand beyond resource exploration and drilling.

The country's geothermal development ecosystem includes drilling contractors, wellhead equipment suppliers, steam-gathering specialists, reservoir experts, engineering firms, consultants, equipment manufacturers and other technical service providers.

GDC's procurement history reflects this wider ecosystem.

Recent procurement activities have included drilling cement for Menengai, Baringo-Silali and Suswa; drilling foam; rig accessories; wellhead equipment and valves; drilling-related equipment; and instrumentation for the Menengai Steam Gathering System.

This means the latest restricted tender should be viewed within a broader pattern of specialized procurement supporting Kenya's expanding geothermal infrastructure.

The sector is increasingly moving toward the operational optimization of existing geothermal assets alongside exploration and development of new resources.

Menengai's Expanding Infrastructure

The scale-management requirement also sits within an increasingly developed geothermal field.

GDC reports that Menengai has approximately 50 kilometres of roads, a 30-kilometre water supply system, and a 25.5-kilometre Steam Gathering System, alongside other project infrastructure.

The Steam Gathering System collects and delivers geothermal steam from the steam field to power plants, making reliable well and steam-field performance an important component of the overall generation system.

The field's development therefore involves much more than individual wells.

It is an interconnected geothermal production system in which wells, gathering infrastructure and power-generation facilities must operate together.

A problem affecting well productivity can consequently have implications beyond the individual well.

This is one reason why specialized downhole services can be strategically important in a mature or expanding geothermal field.

Geothermal Well Intervention Is Becoming More Important

As geothermal development scales globally, the industry is increasingly paying attention to the performance of existing wells.

Drilling new wells remains fundamental to geothermal expansion, but maintaining and maximizing the productivity of wells that have already been drilled can also have significant value.

Well intervention can potentially help operators address declining productivity, mechanical problems, deposition, flow restrictions and other issues that affect production.

In this context, scale management is part of a wider geothermal well-integrity and performance-management challenge.

The GDC tender therefore provides an example of how Kenya's geothermal market is developing specialized requirements around the operational phase of geothermal development.

It also highlights an area where international geothermal service companies may be able to bring specialized technologies into the Kenyan market.

GDC's Broader Role in Kenya's Geothermal Development

GDC was established to accelerate geothermal resource development and reduce the risks associated with geothermal investment.

The company's Menengai activities form part of this broader strategy.

In June 2026, GDC highlighted Kenya's achievement of surpassing 1,000 MW of installed geothermal power generation, describing its role in resource exploration, drilling and de-risking geothermal investments. GDC said more than 390 MW of geothermal power generated from steam developed by the company in Menengai and Olkaria was connected to the national grid.

The company's activities are also extending beyond conventional electricity generation.

GDC has been exploring direct-use applications at Menengai, including geothermal heat utilization and industrial applications. A 2026 GDC initiative examined the potential for a geothermal industrial park using geothermal heat to support manufacturing and reduce industrial energy costs.

This broader development creates an environment where maintaining the underlying geothermal resource becomes increasingly important.

What Qualified Firms Need to Note

The notice gives prospective participants a short timeline.

Interested and qualified firms are required to forward:

• Full company details
• Company contacts
• Their eGP registration number

The information is to be submitted to GDC's Manager, Supply Chain Management.

The notice identifies the following GDC procurement contacts:

Manager, Supply Chain Management

Geothermal Development Company Limited

Kawi House

P.O. Box 100746–00101

Nairobi, Kenya

The notice provides procurement@gdc.co.ke, pkapto@gdc.co.ke, cc: mmuruga@gdc.co.ke, and ikanda@gdc.co.ke as the relevant email contacts.

The stated deadline is Friday, 2 October 2026 at 4:00 p.m. East Africa Time.

Prospective bidders should rely on the official GDC procurement communication and documentation for the applicable submission requirements rather than treating secondary summaries as substitutes for the procurement notice.

Opportunity for Specialized Geothermal Technology Companies

The procurement could attract companies with capabilities across several areas of geothermal well services.

These could include firms with expertise in:

Downhole intervention: Technologies designed to access and address problems within geothermal wells.

Scale removal: Specialized techniques for removing deposits affecting wellbore or formation performance.

Scaling mitigation: Technologies, engineering methods or treatment approaches aimed at reducing the formation or accumulation of scale.

Wellbore diagnostics: Tools and techniques used to understand restrictions, deposition and changes in well performance.

Formation treatment: Specialized services targeting deposits or conditions affecting fluid movement in the geothermal formation.

Geothermal chemistry: Expertise in understanding geothermal-fluid characteristics and their relationship with mineral deposition.

The actual eligibility and technical requirements will ultimately depend on GDC's procurement process and documentation.

A Strategic Moment for Menengai

The timing of the procurement is notable.

Menengai is moving from a resource-development story toward a broader operational geothermal ecosystem involving steam production, power generation and continued field expansion.

With multiple power projects associated with the field, the importance of maintaining reliable geothermal steam production is increasing.

The latest procurement consequently demonstrates that geothermal development does not end when a well is drilled.

The long-term performance of geothermal assets depends on continued technical management.

Wellbore conditions, reservoir behavior, fluid chemistry, mechanical integrity and surface infrastructure all contribute to the performance of a geothermal field.

Specialized scale-management services form part of that equation.

Kenya's Geothermal Supply Chain Continues to Deepen

The new GDC notice also demonstrates the increasing sophistication of Kenya's geothermal supply chain.

Earlier procurement processes have covered everything from drilling materials and rig accessories to wellhead equipment, steam-gathering instruments and other technical services.

The emergence of a dedicated requirement for wellbore and formation-scale removal and scaling mitigation illustrates how procurement is increasingly responding to specific operational challenges.

For international companies looking at East Africa, such requirements can provide an entry point into a market where geothermal development is moving beyond resource exploration into long-term asset management.

For Kenyan companies, the opportunity also highlights the potential value of partnerships with international technology providers possessing specialized geothermal intervention capabilities.

The Bigger Picture

Menengai is one part of Kenya's wider geothermal strategy, but its development provides a useful illustration of where the industry is heading.

The country has established itself as one of the world's important geothermal markets, while GDC continues to develop resources and create opportunities for independent power producers, equipment suppliers, consultants and specialized service companies.

At Menengai, the challenge is no longer simply identifying geothermal resources.

It is increasingly about developing, operating, maintaining and optimizing those resources over the long term.

The latest restricted tender fits directly into that transition.

By seeking specialized services for downhole wellbore and formation-scale removal and scaling mitigation over three years, GDC is addressing an operational requirement associated with sustaining geothermal well performance.

For companies possessing the necessary technical expertise and procurement qualifications, the 2 October 2026 deadline makes the opportunity particularly time-sensitive.

As Kenya's geothermal capacity continues to expand, specialized well services are likely to remain an important part of the industry's next phase.

The GDC procurement notice is therefore more than another tender announcement. It is a window into the increasingly sophisticated technical requirements emerging around one of Kenya's flagship geothermal fields.

Source : GDC