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The global energy sector from a subsurface perspective

Geothermal

An exciting drilling campaign in exciting geology

Henk Kombrink
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…

Bacterial life is everywhere in the subsurface

Henk Kombrink
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
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…

Preventing scaling in geothermal production wells

Henk Kombrink
The Munich area in Germany is lucky when it comes to its geo­thermal potential. There is a good Upper Jurassic car­bonate reservoir at the right depth, and the water com­position…

Too fast, too soon

Henk Kombrink
In Geothermal energy production, it is all about the tem­perature of the produced water, brine or steam. A drop in temperature has a direct effect on the amount of energy…

Pushing the limits of tracer technology

Henk Kombrink
Utah FORGE project. Photography: Resman Energy Technology. “The conventional oil and gas in­dustry has been familiar with tracer technology for a long time,” says Roy Greig from RESMAN Energy Tech­nology.…

Every site is different

Henk Kombrink
James Horton at a closed loop manifold installation at Birmingham’s Moseley Hall Hospital. Source: James Horton. Shallow closed loop boreholes (150-300 m deep) for ground source heat pumps (GSHP) are…