Geothermal Archives

Geothermal

Embracing uncertainty in geothermal exploration

August 7, 2025

“If we can’t discuss uncertainty, we won’t go anywhere.” Geothermal Radar’s co-founder Philip Ball is adamant about what is currently lacking in the planning of new geothermal exploration wells. “Where…

Shaving off costs for geothermal exploration and production

Henk Kombrink

July 28, 2025

“ Let’s face it,” says Arndt Peterhaensel from TRACS, “with the energy density of geothermal energy being so much lower than from hydrocarbons, the service sector around this resource has…

Extract and re-inject water, from the same well

Henk Kombrink

July 18, 2025

The city of Munich is blessed with a very permeable succession of Quaternary sediments that enables a high and consistent supply of groundwater flow. As such, there is great potential…

Building a reservoir model for a geothermal field

Henk Kombrink

July 14, 2025

The first well in the Ohaaki geothermal field in New Zealand was drilled in 1965. However, it lasted until 1989 before power production really started, even though large-scale testing of…

The “nugget effect” in geothermal exploration

Henk Kombrink

July 9, 2025

“We see permeabilities of 10 Darcy and above 15 % porosity, easily,” says Alan Bischoff. Alan is associate professor of geoenergy at the University of Turku in Finland. In that…

Why data obtained by legacy gas wells are not always a good indicator for assessing geothermal potential

Henk Kombrink

June 20, 2025

The Upper Permian Rotliegend sandstone in the Netherlands is a very well-explored reservoir. That is because a lot of gas fields are reservoired in this aeolian and fluvial succession that…

Has the Aarhus geothermal project become a little less geothermal than initially planned?

Henk Kombrink

June 12, 2025

In a recent statement on LinkedIn, geothermal exploration and development company Innargi announced that its flagship project in Aarhus, Denmark, will be developed differently from what was originally foreseen. Where…

An exciting drilling campaign in exciting geology

Henk Kombrink

June 5, 2025

Did EBN set a trend? That’s to be seen, but the four-well geothermal drilling campaign the Croatian Hydrocarbon Agency recently embarked on to prove the potential of an equal number…

Coring a geothermal reservoir in oil and gas heartlands

Henk Kombrink

May 28, 2025

Lower Saxony, the German state that finds itself in the north-western part of the country, has a rich history in drilling and coring. But until recently, activities on that front…

Bacterial life is everywhere in the subsurface

Henk Kombrink

May 7, 2025

Elsemiek Croese. Photography: Elsemiek Croese private archive. “Let’s put it this way,” says Elsemiek Croese from Microbial Analysis, “one of the key ingredients of life is water. In that light,…

Not-so-hot volcanic rocks in Saudi Arabia

Henk Kombrink

April 16, 2025

This in what a team of researchers concluded in a paper published in the journal Geothermics this year. It must have been a bit of a surprise to find very…

How interested is Eavor in sharing drilling results of the Geretsried project?

Henk Kombrink

April 4, 2025

If I fail to hear back from companies when enquiring for information about a project, I mostly decide not to write about it at all. But in the case of…

The global energy sector from a subsurface perspective

Geothermal

Embracing uncertainty in geothermal exploration

Shaving off costs for geothermal exploration and production

Extract and re-inject water, from the same well

Building a reservoir model for a geothermal field

The “nugget effect” in geothermal exploration

Why data obtained by legacy gas wells are not always a good indicator for assessing geothermal potential

Has the Aarhus geothermal project become a little less geothermal than initially planned?

An exciting drilling campaign in exciting geology

Coring a geothermal reservoir in oil and gas heartlands

Bacterial life is everywhere in the subsurface

Not-so-hot volcanic rocks in Saudi Arabia

How interested is Eavor in sharing drilling results of the Geretsried project?

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