Sign In or Create an Account.

By continuing, you agree to the Terms of Service and acknowledge our Privacy Policy

Podcast

Say ‘Guten Tag!’ to This New Kind of Geothermal Tech

Rob and Jesse catch up with Mark Fitzgerald, CEO of the closed-loop geothermal startup Eavor.

An Eavor facility.
Heatmap Illustration/Eavor

Over the past decade, the oil and gas industry has sharpened its drilling skills, extracting fossil fuels at greater depths — and with more precision — than ever before. What if there was a way to tap those advances to generate zero-carbon energy?

The Canadian company Eavor (pronounced “ever”) says it can do so. Its closed-loop geothermal system is already producing heat at competitive prices in Europe, and it says it will soon be able to drill deep enough to fuel the electricity system, too. It just opened a first-of-its-kind demonstration facility in Germany, which is successfully heating and powering the small hamlet of Geretsreid, Bavaria.

On this week’s episode of Shift Key, Rob and Jesse chat with Mark Fitzgerald, the president and CEO of Eavor, about how its new technology works, how it differs from other forms of advanced geothermal, and why Europe is a good test bed for heat-generating projects. We also chat about what Mark, who previously ran Petronas Canada, learned in his 35 years in the oil industry.

Shift Key is hosted by Robinson Meyer, the founding executive editor of Heatmap, and Jesse Jenkins, a professor of energy systems engineering at Princeton University.

Subscribe to “Shift Key” and find this episode on Apple Podcasts, Spotify, Amazon, or wherever you get your podcasts.

You can also add the show’s RSS feed to your podcast app to follow us directly.

Here is an excerpt from our conversation:

Jesse Jenkins: So at the surface, this is a very limited footprint, right? It’s a fairly small power plant, and then underground, you’ve got this kilometer-scale heat exchanger effectively that you’ve built without fracturing, but with a lot of drilling involved, right? So the key, I think, for making that work is to continually advance the economics of drilling.

What is Eavor’s strategy there for bringing down the cost of drilling these closed loops so that they become cost competitive despite the large amount of total miles drilled that you have to — or kilometers drilled that you have to put down?

Mark Fitzgerald: That’s a great point, Jesse, and I would reinforce that drilling technology, or drilling efficiency, has been something that’s been talked about and understood across the globe for a hundred-plus years. So we are not creating a new method of drilling. We are not looking for something that hasn’t been already done across any of the unconventional players in North America, any of the big drilling or service companies or operators around the globe.

What we are doing is changing the trajectory, and changing the application of that drilling methodology to create the underground radiator, as you would talk about. My background — I spent 36 years in oil and gas, a great proportion of that in the unconventional space before I had this amazing opportunity to join Eavor. And so I understand how, through sound engineering, sound geoscience, proper modeling, that cost compression will occur. One of the best examples that I point to is, we completed six laterals — so six of these horizontal wells, or these forks, at a time, connected them in Geretsreid, our first facility in Germany. The fourth and fifth laterals were done at 50% of the cost of the first two. And so already, in moving from lateral one to lateral six, we’ve seen a reduction of 50% in the cost structure.

The second is that in terms of pace of drilling, the faster you drill the lower costs you incur. The pace of drilling for us on those fifth and six laterals was three times what it was on lateral one and two.

Mentioned:

The Eavor-Loop in Geretsreid

Previously on Shift Key: Why Geothermal Is So Hot Right Now

Jesse’s upshift; Rob’s downshift.


This episode of Shift Key is sponsored by …

Heatmap Pro brings all of our research, reporting, and insights down to the local level. The software platform tracks all local opposition to clean energy and data centers, forecasts community sentiment, and guides data-driven engagement campaigns. Book a demo today to see the premier intelligence platform for project permitting and community engagement.

Music for Shift Key is by Adam Kromelow.

Green

You’re out of free articles.

Subscribe today to experience Heatmap’s expert analysis 
of climate change, clean energy, and sustainability.
To continue reading
Create a free account or sign in to unlock more free articles.
or
Please enter an email address
By continuing, you agree to the Terms of Service and acknowledge our Privacy Policy
Ideas

The Last Time America Tried to Legislate Its Way to Energy Affordability

Lawmakers today should study the Energy Security Act of 1980.

Jimmy Carter.
Heatmap Illustration/Getty Images, Library of Congress

The past few years have seen wild, rapid swings in energy policy in the United States, from President Biden’s enthusiastic embrace of clean energy to President Trump’s equally enthusiastic re-embrace of fossil fuels.

Where energy industrial policy goes next is less certain than any other moment in recent memory. Regardless of the direction, however, we will need creative and effective policy tools to secure our energy future — especially for those of us who wish to see a cleaner, greener energy system. To meet the moment, we can draw inspiration from a largely forgotten piece of energy industrial policy history: the Energy Security Act of 1980.

Keep reading...Show less
Blue
AM Briefing

The Grinch of Offshore Wind

On Google’s energy glow up, transmission progress, and South American oil

Donald Trump.
Heatmap Illustration/Getty Images

Current conditions: Nearly two dozen states from the Rockies through the Midwest and Appalachians are forecast to experience temperatures up to 30 degrees above historical averages on Christmas Day • Parts of northern New York and New England could get up to a foot of snow in the coming days • Bethlehem, the West Bank city south of Jerusalem in which Christians believe Jesus was born, is preparing for a sunny, cloudless Christmas Day, with temperatures around 60 degrees Fahrenheit.

This is our last Heatmap AM of 2025, but we’ll see you all again in 2026!

THE TOP FIVE

1. Trump halts construction on all offshore wind projects

Just two weeks after a federal court overturned President Donald Trump’s Day One executive order banning new offshore wind permits, the administration announced a halt to all construction on seaward turbines. Secretary of the Interior Doug Burgum announced the move Monday morning on X: “Due to national security concerns identified by @DeptofWar, @Interior is PAUSING leases for 5 expensive, unreliable, heavily subsidized offshore wind farms!” As Heatmap’s Jael Holzman explained in her writeup, there are only five offshore wind projects currently under construction in U.S. waters: Vineyard Wind, Revolution Wind, Coastal Virginia Offshore Wind, Sunrise Wind, and Empire Wind. “The Department of War has come back conclusively that the issues related to these large offshore wind programs create radar interference, create genuine risk for the U.S., particularly related to where they are in proximity to our East Coast population centers,” Burgum told Fox Business host Maria Bartiromo.

Keep reading...Show less
Green
Energy

Google Is Cornering the Market on Energy Wonks

The hyperscaler is going big on human intelligence to help power its artificial intelligence.

The Google logo holding electricity.
Heatmap Illustration/Getty Images

Google is on an AI hiring spree — and not just for people who can design chips and build large language models. The tech giant wants people who can design energy systems, too.

Google has invested heavily of late in personnel for its electricity and infrastructure-related teams. Among its key hires is Tyler Norris, a former Duke University researcher and one of the most prominent proponents of electricity demand flexibility for data centers, who started in November as “head of market innovation” on the advanced energy team. The company also hired Doug Lewin, an energy consultant and one of the most respected voices in Texas energy policy, to lead “energy strategy and market design work in Texas,” according to a note he wrote on LinkedIn. Nathan Iyer, who worked on energy policy issues at RMI, has been a contractor for Google Clean Energy for about a year. (The company also announced Monday that it’s shelling out $4.5 billion to acquire clean energy developer Intersect.)

Keep reading...Show less
Yellow