GEOLOG & Ignis H2 Energy

Guy Oliver has more than 35 years of experience across the energy sector, with a background spanning subsurface evaluation, energy transition and data-driven decision-making. Throughout his career, he has led technical and commercial initiatives focused on digital technologies, sub-surface reservoir characterization and the energy transition.

Evaluating Geothermal through a Subsurface Lens

My background across the energy sector has led to a more disciplined, subsurface-led and commercially grounded approach to evaluating emerging energy opportunities. I am most interested in whether a project is technically sound and whether uncertainty at any point is manageable. With more data, uncertainty should decrease as a project matures.

In geothermal, the resource itself is fundamental to success. A better understanding of the reservoir leads to better de-risking and a clearer view of what is bankable.

Having worked in capital-intensive environments, I evaluate projects through a full-cycle economic lens that includes drilling risk, infrastructure requirements, time to first revenue and offtake certainty. Technically viable does not equal commercially viable. The focus should be on projects that can realistically cross the bankability threshold.

Looking beyond Power Generation

One of the most compelling aspects of geothermal development is its ability to support more than electricity generation. Projects like GeoAlaska’s Augustine Island geothermal project highlight how geothermal energy can become the foundation for broader industrial development.

Geothermal resources can support low-carbon fuels, hydrogen, sustainable aviation fuel feedstocks, future e-fuels, direct lithium extraction and data center infrastructure. This significantly increases the value generated from geothermal capacity.

“Geothermal’s role in the energy transition is not about volume. It is about function.”

The strategic importance of projects like Augustine also extends beyond renewable energy. A large, long-life geothermal resource can support energy security, reduce exposure to fuel market volatility and become the backbone for industrial development. The combination of geothermal power, industrial processing, strategic infrastructure and investment can create a self-reinforcing economic ecosystem that attracts further capital over time.

Reducing Uncertainty through Data Science

One of the biggest challenges in geothermal development is subsurface uncertainty, translating into financial risk. Temperature, permeability and fluid chemistry must align, and they are only fully confirmed once wells are drilled.

Data science can assist with reducing that uncertainty. This includes integrating multiple subsurface datasets, utilizing AIassisted analysis, applying probabilistic resource models and using real-time drilling analytics to improve well targeting.

There is also a gap between exploration success and project financing. Financiers require proven flow rates, longterm reservoir performance models and confidence in reservoir sustainability. Data science can help translate technical uncertainty into risk metrics that are easier to evaluate and finance.

Geothermal’s Role in the Energy Transition

Geothermal is unlikely to dominate the global energy mix in sheer capacity terms during the next decade, but its strategic value is much greater than its percentage share.

Wind and solar are growing rapidly, but geothermal fills a critical gap by providing 24/7 baseload power, high-capacity factors and minimal weather dependence. It also offers longlife, domestically sourced energy that is not exposed to fuel price volatility.

Geothermal’s role in the energy transition is not about volume. It is about function. It provides stability in a variable system, reliability without emissions and flexibility across power and heat applications. As renewable penetration increases, those characteristics become increasingly important.

Advice for Energy Professionals

Not all geothermal resources are equal. High temperature, sustainable recharge and favorable reservoir properties remain critical to long-term project economics.

The opportunity for geothermal sits directly in front of existing, high-value demand for reliable, around-the-clock energy. At the same time, success depends on access to highquality heat resources with favorable reservoir characteristics and long-term sustainability.

Scalability is equally important. Improvements in drilling, subsurface imaging, modeling and reservoir management are creating new opportunities to expand geothermal development. When market demand, resource quality and scalability align, geothermal moves from a niche renewable to a foundational energy platform.