Prof Sebastian Geiger
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geoenergyprof.bsky.social
Prof Sebastian Geiger
@geoenergyprof.bsky.social
350 followers 240 following 110 posts
Professor for Sustainable Geoenergy at TU Delft and passionate 🇪🇺, conducting #research in #geoenergy, #geoscience, & #energytransition (views are my own)
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geoenergyprof.bsky.social
At this year's #EAGEAnnual2025 my colleague Anne gave a truly passionate and compassionate pitch why #geoscience #education needs to become more inclusive and diverse if we are serious about inspiring new talents to enter this field and work on the #energytransition @rockdeftud.bsky.social ⚒️💡🔋
June 3, 2025 at 5:03 PM
geoenergyprof.bsky.social
Together with colleagues from @imperialcollegeldn.bsky.social we have tried to bring some clarity into the concept of capillary pinning during #CCS, considering the scales and heterogeneity in #geology www.sciencedirect.com/science/arti...
A conceptual picture showing how CO2 injected into a saline aquifer is being trapped across different scales - from pore- to reservoir-scale - due to capillary forces and barriers in capillary pressure, arising from geological heterogeneities at these scales.
May 6, 2025 at 8:14 AM
geoenergyprof.bsky.social
A statement of solidarity with our colleagues and their students from the Department of Earth Sciences at the Vrije Universiteit Amsterdam #geoscience #academia #science #earthscience #climatechange #energytransition ⚒️🧪🧬💡🔌
The Vrije Universiteit of Amsterdam (VU) announced the decision to close its earth sciences department & cut 42 jobs as part of a wider measure to save €60M. The BSc degree in earth sciences will be discontinued. We want to express our solidarity with our colleagues & the students at the VU, as well as their families, who face unprecedented uncertainties about their future. Our thoughts are with them. These cuts are not only devastating for the affected staff & students. They will have major consequences for geoscience research & teaching in the Netherlands & beyond. Geoscience in the Netherlands is highly respected around the world by industry & academia alike. This respect is firmly grounded in the collaborative, complementary & internationalised approach to research & teaching across the Netherlands. Losing a crucial part of the Dutch geoscience knowledge base at the VU will weaken the international standing of the Netherlands in the broader field of earth & geosciences, not only putting innovation at risk in a time where we can ill-afford this, but also reducing the number of urgently needed graduates. Geosciences underpin many of the solutions that we need to tackle some of the most severe challenges humanity faces: combating climate change, access to clean water, energy security & energy transition, sustainable sourcing of critical raw materials, understanding the impact of environmental change, or mitigating the risks of natural hazards. While we can debate how we can better communicate the importance of geosciences to increase student numbers, closing the earth science department at the VU sends the wrong message: that geosciences are expendable, at a time when they are needed more than ever. Only through cooperation & solidarity, not only in the field of geosciences & not only in the Netherlands, universities will be able to push back against government cuts & anti-science politics that threaten to inflict potentially devastating damages to our society.
April 10, 2025 at 3:18 PM
geoenergyprof.bsky.social
Spring is in the air at TU Delft ☀️🌼🌸🌻
A cycling path at TU Delft's campus flanked by blossoming trees and beneath a clear blue sky at which the sun is starting to set, indicating that spring isthr corner just aeo
March 27, 2025 at 6:29 PM
geoenergyprof.bsky.social
🚨New #openaccess paper: Jointly with colleagues from Imperial College London & University of Calgary we are answering the question at which scale we can average properties of the Bunter Sandstone, a key target for #geothermal energy & #CCS in Europe #geology #energytransition doi.org/10.1016/j.ad...
A figure panel consisting of 5 rows and three columns. The first column shows images of core samples from the Bunter Sandstone formation. The second column shows typical geological structures observed at the scale of a few metres in outcrop analogues that correspond to the core data. The last column shows conceptual geological models that captures the heterogeneities observed at the different scales, i.e. core- and outcrop scale.
March 3, 2025 at 11:41 AM
geoenergyprof.bsky.social
Our colleagues and friends from Electricite Strasbourg are busy promoting the FindHeat research project, funded by Hoirzon Europe, at the Geotherm Conference & Expo. FindHeat develops new tools and workflows to accelerate and de-risk geothermal exploration and appraisal. #geology #energysky
Four geothermal scientists, two men, two female, holding posters of the FindHeat research project in front of the Geotherm Conference and Expo sign
February 20, 2025 at 6:32 PM
geoenergyprof.bsky.social
Some truly excellent talks on energy transition, critical raw materials, climate change & water resources - and a much needed positive message on #CO2 emissions from @kornelis.bsky.social at the half-Lustrum event that our #geoscience & #mining student association at TU Delft hosted today.
A TU Delft Professor giving a lecture that explains why there is hope for reducing CO2 emissions even in 2925.
February 18, 2025 at 9:35 PM
geoenergyprof.bsky.social
More #geology field work impressions from the CrossScale team (can you spot the drone?), and more samples being collected to be analysed in the lab together with @rockdeftud.bsky.social ⚒️
Two geologists taking notes in sandstone quarry on a sunny winter day, with another geologist in the background. Drone shot of two geologists in a sandstone quarry, looking upwards at the drone. A geologist taking a photograph of a freshly cut sandstone quarry wall on a clear winter day with blue skies A geologist measuring the strike and dip of sedimentary structures in a sandstone outcrop
February 5, 2025 at 11:29 AM
geoenergyprof.bsky.social
Some stunning pictures from the CrossScale team's fieldwork in Germany, studying types and scales of heterogeneities in the Rotliegend, a major formation targeted for #geothermal energy and #CCS in Europe. Looking forward to working with @rockdeftud.bsky.social to analyse the samples! ⚒️
Outcrop of a sandstone, showing bright-red colours in the evening sun with a blue sky in the background Three geologists standing in front of an outcrop and overlooking a valley in the evening sun with blue skies all around Outcrop of a sandstone, showing different sedimentary structures. The outcrop is bright-red coloured Two geologists in front of an outcrop of a sandstone, showing bright-red colours in the evening sun with a blue sky in the background
February 4, 2025 at 4:35 PM
geoenergyprof.bsky.social
A bit foggy to date on campus... 🌫️
A picture of very dense fog on the campus of TU Delft
January 21, 2025 at 4:26 PM
geoenergyprof.bsky.social
One of the rare days when the weather is stunning in Edinburgh and you are still on leave ❄️☀️
January 3, 2025 at 12:53 PM
geoenergyprof.bsky.social
Rare snow days and a mini @bunsenbernerbmd.bsky.social
November 23, 2024 at 1:13 PM
geoenergyprof.bsky.social
We have lift-off! This week we held the kick-off meeting for the FindHeat project at TU Delft. The project, focusing on #geothermal energy in Europe, is generously supported by Horizon Europe, the Swiss National Science Foundation, and UK Research and Innovation. 🔌💡⚒️
A group of scientists standing on a staircase, waiving their arms and celebrating the successful launch of a research project together
November 21, 2024 at 8:54 PM
geoenergyprof.bsky.social
Great to see more and more colleagues from TU Delft arriving here

@fromtheurgonian.bsky.social
@rockdeftud.bsky.social
@kornelis.bsky.social
@jrvo.bsky.social
@gabrielweymouth.bsky.social
@tudelta.bsky.social
@imphys-tudelft.bsky.social

There are probably more already?
View of the TU Delft Campus on a sunny winter day, showing the famous building (skyscraper) of the Faculty of Electrical Engineering, Mathematics and Computer Science in the background and a series of posters featuring energy transition researches at TU Delft in the foreground
November 19, 2024 at 10:43 PM
geoenergyprof.bsky.social
Lots of fun learning about induced seismicity at the EPIS meeting (and presenting the Delft Geothermal Project to an audience patient enough to listen to a reservoir modeller), followed by meeting old and new colleagues at the DeepNL meeting where our CrossScale PhDs showed their first poster. ⚒️🔌💡
Conference room with a presenter speaking in front of a big screen that shows a geothermal drill rig. Picture was taken by Loes Buijze Two PhD students in front of their poster, one female and one male student Conclusion slide explaining that geological heterogeneities across multiple scales matter to fluid flow and reservoir deformation and hence need to be incorporated into reservoir models, which requires us to understand the scales of representative elementary volumes. The slide also shows a picture of a person who waera a t-shirt that reads "geologists were created because engineers need heroes too"
November 15, 2024 at 5:23 PM
geoenergyprof.bsky.social
I remember these early (ECOSSE) days all too well... Brilliant to see how far the scanner has come!
A crane lifting a granite slab over a roof at Edinburgh University; the granite slab will be the base for the CT scanner A first picture showing the setup of the CT scanner, still under construction, at University of Edinburgh
November 13, 2024 at 8:46 PM
geoenergyprof.bsky.social
We have a logo for our EU Horizon Europe funded FindHeat project and some cool merch as well. The FindHeat project aims to advance the development of #geothermal #energy thanks to better understanding of uncertainties related to #geology and #geoscience ⚒️🔌💡
Logo for the FindHeat project, showing the letters FINDHEAT in the form of rocks and a geothermal plume below the letters, indicating the displacement of hot water in read by cold water in blue. The logo also contains the words EXPLORE, ASSESS, COMMUNICATE which is the theme of the FindHeat project. A metal, silver-coloured coffee mug with the FindHeat logo printed on it.
November 13, 2024 at 2:24 PM
geoenergyprof.bsky.social
After the School, we even found the time for a quick trip to Lake Louise, enjoying some of the wonderful landscape and geology in stunning autumn weather ⚒️
Image of a river and snow-capped mountains and vast pine forests in the Canadian Rocky Mountains Image of Lake Louise, with snow-covered mountains reflecting in a lake A snow-covered footpath leading to Lake Louise, with snow-topped mountains in the background Image of a mountain range against a deep-blue sky
November 9, 2024 at 4:17 AM
geoenergyprof.bsky.social
A truly inspiring 2 days at the Energi Simulation School in Banff, Canada, exploring with students from across the world the technical, societal, and ethical challenges that we encounter when transitioning to a timely and fair net-zero energy future without leaving anyone behind. 🔌💡
Lecturer in front of a screen showing a slide saying "our role in the energy transition" Image of the Kaya Identity, explaining the factors that impact greenhouse gas emissions Picture of a room showing students working in groups Four happy students sitting around a table, working together on an energy transition problem
November 9, 2024 at 4:13 AM
geoenergyprof.bsky.social
Well, this was the last straw that caused me to close my account on the other site. So let's restart here. What I am passionate about (in no particular order)? Sustainability, a just energy transition, geothermal, CCS, DEI, learning from others, my students, my family, our dog, cycling, outdoors
A family with a dog Dog with a cuddly toy Double rainbow in the Scottish Lowlands Bicycle in a mountain valley
November 6, 2024 at 8:42 PM
geoenergyprof.bsky.social
Today is world #geothermal #energy day - so why not use your #geoscience skills and apply for this #PhD vacancy in assessing geological, technical and economic uncertainties related during #geothermal exploration and appraisal at TU Delft bit.ly/3Ue1zw6
An erupting geyser in Iceland
October 17, 2024 at 1:12 PM
geoenergyprof.bsky.social
Welcome to our new #PhD candidate Jesse Steinvoort, who will be working with us on upscaling flow and geomechanical processes related to #geothermal energy and #CCS on the #NWO funded CrossScale project, in collaboration with @jojomio.bsky.social and his team at Uni Groningen
Workflow of the CrossScale project, and interdisciplinary research project funded by the Dutch Research Council to study geological heterogeneities across scales, develop upscaling methods, and demonstrate how better geological understanding leads to better predictions of subsurface behaviours that positively impacts society when developing future geothermal and CO2 storage projects
September 3, 2024 at 9:39 AM
geoenergyprof.bsky.social
@seismatters.bsky.social @zzsylvester.bsky.social @drnatashadowey.bsky.social @drwendyrocks.bsky.social @geoforthefuture.bsky.social @gfz.bsky.social @thejow.bsky.social @timdemko.xyz @britgeosurvey.bsky.social @rocklabstrasbourg.bsky.social @mcnamadd.bsky.social @northseacore.bsky.social
Flyer advertising the thematic issue "The sustainable future of geoenergy in the hands of early career researchers" to be published by Geoenergy
August 9, 2024 at 9:17 AM
geoenergyprof.bsky.social
Congratulations to Alfredo Freites who defended his #PhD thesis today. Alfredo is one #PhD students who started with me when I was still working at Heriot-Watt University. Thank you to Katriona Edlmann & Dan Arnold for conducting the viva and Pat Corbett & Florian Doster for the co-supervision 🎉
Microsoft Teams screenshot showing the happy PhD candidate, the examiners, and the PhD advisor
August 9, 2024 at 7:13 AM
geoenergyprof.bsky.social
In some personal news, I am really looking forward to this endeavour and working jointly with the fantastic editorial board & reviewers. Do you have some #geoscience R&D related to the #energytransition? Then why not consider Geoenergy for publishing it?
June 5, 2024 at 10:04 PM