Cape Station and the case of the missing reserves report
In a press release dated June 10 2025, Fervo Energy announced a reserves report by DeGolyer & MacNaughton (D&M), which they say confirms that the Cape Station project can support…
Geothermal
The low productivity of enhanced geothermal systems
Fervo Energy operate the world’s most well-funded Enhanced Geothermal Systems (EGS) project at Cape Station, Utah, and have published well test results from which the Productivity Index can be estimated.…
Eavor stepping away from operator role in Geretsried
Fair play. I have published about Eavor before, and I’ve been critical not only of the level of secrecy surrounding the company and its operations, but also of the concept…
United Downs – it is too early to uncork the bottle
Maybe it is because I am connected with Ryan Law on LinkedIn, but the number of posts about the success of the United Downs geothermal project was unstoppable for a…
Has enhanced geothermal been proven at scale?
A few days ago, Fervo published production data from their geothermal Project Red in Nevada that answers some of the questions posed in previous GeoExpro articles. However, it also raises…
Slim is smart
“Why drill 150 mm when 120 mm will do?” That simple question sparked an ongoing discussion between Bruce and his son Ryan Gatherer. Bruce has spent more than 35 years…
From the shores of Lake Geneva to NEOM in Saudi
Nicolas de Varreux. “What are you doing?” Nicolas de Varreux asked his neighbour in Switzerland when a drilling rig rolled into his garden back in the summer of 2005. He…
If plans come to fruition, the Aarhus geothermal project in Denmark may almost deliver what was promised
The Aarhus geothermal project in Denmark, developed by Innargi, has been a flagship project since it was announced in 2022. One of the most differentiating things Innargi did in order…
World’s largest geothermal reserves?
By convention, geothermal reserves are normally reported as net recoverable energy – usually as Megawatts of electrical generating power (MWe) for a specified period of time – 30 years is…
Layer cake geology and a lack of grid access
A few years ago, I asked a seasoned wellsite geologist about the biggest subsurface surprise she had ever seen over her long career working on rigs. Rather than coming up…
A very expensive fart in the wind
Early December last year, Eavor announced the start of electricity production from their Geretsried deep closed-loop project in the south of Germany, near the village of Geretsried. As expected, it…
Where the earth yawns
I first visited Iceland a decade ago. Recently, I returned, courtesy of a European Geothermal Research project, hosted by Reykjavik Energy. We learned about heating and electricity production in Iceland,…