Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Successful: Cement on Top of Carbon Dioxide

06.07.2015

Final phase of the project on the geological storage of CO2

04.07.2015: Today the final phase of the project on the geological storage of the greenhouse gas carbon dioxide at Ketzin/Havel started with the abandonment of the first of five wellbores.


Abandonment works at the drillsite Ktzi 202 in Ketzin, core of the former cementation (photo: T. Kollersberger, GFZ)

After successful completion of the active injection and the monitoring phase the final project phase termed COMPLETE will now stepwise abandon all wellbores of the pilot site according the regulations set by the German mining law. With this the pilot project on the geological storage of the greenhouse gas CO2, which is operated by the GFZ German Research Centre for Geosciences, now enters its terminal phase.

The abandonment of the wellbore is done in a stepwise manner. The wellbore is completed with successive casings with decreasing diameters. The lower part of the innermost casing is cut at about 459 meter depth and pulled out. Subsequently, the wellbore is cemented up to a depth of 275 meter. After hardening of this first cement bridge, the next bigger casing is cut at about 265 meter depth, pulled out and the wellbore cemented up to the surface.

The well abandonment is completed by deconstruction of the wellbore cellar and its foundation. „The now started work will provide first-hand results on the safe abandonment and closure of a CO2 storage site that are also internationally unique“, explains Axel Liebscher, Head of the Centre for Geological Storage at the GFZ.

What sounds as unspectacular routine work at a first glance, signalises the finalization of a more than ten years lasting scientific and engineering success story. „Together with its precursor projects CO2SINK and CO2MAN the ongoing project COMPLETE closes for the first time the complete life cycle of a CO2 storage site at pilot scale “, Axel Liebscher continues.

„Our research that already started in 2004 provided fundamental knowledge on construction, monitoring, operation and behaviour of a CO2 storage site from the exploration to the closure phase.“ Thereby, the pilot site Ketin comes up with the worldwide most comprehensive surface and subsurface monitoring network for surveillance of the CO2 storage operation.

Liebscher: „We were able to prove that this technology is generally feasible. With fit-to-purpose designed scientific and technical monitoring, CO2 can be safely stored in the subsurface if the geological conditions are suitable.“

After comprehensive pilot survey and the construction of the required infrastructure, a total of about 67,000 t CO2 have been injected at the Ketzin pilot site between June 2008 and August 2013 into porous sandstone at a depth of about 630 to 650 m. In autumn 2013 directly after termination of the injection the observation well Ktzi 202 was partly abandoned with CO2 resistant cement up to a depth of 521 m.

This cementation has been scientifically monitored over more than one and a half year before now the final abandonment of the well started. At the beginning of the final abandonment a three meter long core was drilled and recovered from the first cementation and surveyed on-site.

„Both, the scientific monitoring and survey of the recovered cement core showed, that the cementation performed in autumn 2013 has been successful. We therefore continued with the final abandonment of the well“, Axel Liebscher explains. The remaining four wells at the site will be abandoned and deconstructed in 2016, so that the initial conditions of site will be re-established in 2017.

Further information on the pilot site Ketzin: http://www.co2ketzin.de

Franz Ossing | Helmholtz-Zentrum Potsdam - Deutsches GeoForschungsZentrum GFZ
Further information:
http://www.gfz-potsdam.de/

More articles from Earth Sciences:

nachricht Six-decade-old space mystery solved with shoebox-sized satellite called a CubeSat
15.12.2017 | National Science Foundation

nachricht NSF-funded researchers find that ice sheet is dynamic and has repeatedly grown and shrunk
15.12.2017 | National Science Foundation

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: First-of-its-kind chemical oscillator offers new level of molecular control

DNA molecules that follow specific instructions could offer more precise molecular control of synthetic chemical systems, a discovery that opens the door for engineers to create molecular machines with new and complex behaviors.

Researchers have created chemical amplifiers and a chemical oscillator using a systematic method that has the potential to embed sophisticated circuit...

Im Focus: Long-lived storage of a photonic qubit for worldwide teleportation

MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.

Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...

Im Focus: Electromagnetic water cloak eliminates drag and wake

Detailed calculations show water cloaks are feasible with today's technology

Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...

Im Focus: Scientists channel graphene to understand filtration and ion transport into cells

Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.

To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...

Im Focus: Towards data storage at the single molecule level

The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.

Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

See, understand and experience the work of the future

11.12.2017 | Event News

Innovative strategies to tackle parasitic worms

08.12.2017 | Event News

AKL’18: The opportunities and challenges of digitalization in the laser industry

07.12.2017 | Event News

 
Latest News

Engineers program tiny robots to move, think like insects

15.12.2017 | Power and Electrical Engineering

One in 5 materials chemistry papers may be wrong, study suggests

15.12.2017 | Materials Sciences

New antbird species discovered in Peru by LSU ornithologists

15.12.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>