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  Monitoring Concept for CO2 Storage at the Pilot Site Ketzin, Germany

Wipki, M., Liebscher, A., Lueth, S., Ivanova, A., Möller, F., Schmidt-Hattenberger, C., Rippe, D., Zimmer, M., Szizybalski, A. (2016): Monitoring Concept for CO2 Storage at the Pilot Site Ketzin, Germany, (Geophysical Research Abstracts  ; Vol. 18, EGU2016-3897), General Assembly European Geosciences Union (Vienna, Austria 2016).

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Externe Referenzen

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externe Referenz:
http://meetingorganizer.copernicus.org/EGU2016/EGU2016-3897.pdf (Ergänzendes Material)
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Urheber

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 Urheber:
Wipki, M.1, Autor              
Liebscher, A.1, Autor              
Lueth, S.1, Autor              
Ivanova, Alexandra1, Autor              
Möller, F.1, Autor              
Schmidt-Hattenberger, Cornelia1, Autor              
Rippe, Dennis1, Autor              
Zimmer, Martin2, Autor              
Szizybalski, Alexandra2, Autor              
Affiliations:
16.3 Geological Storage, 6.0 Geotechnologies, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, ou_146050              
23.1 Inorganic and Isotope Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, ou_146040              

Inhalt

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Schlagwörter: Pilot Site in Ketzin, CO2 storage, 3D-seismic, Natural CO2 flux
 Zusammenfassung: Between 2008 and 2013, the German Research Centre for Geosciences – GFZ has injected more than 67 kt of CO2 at the Pilot Site in Ketzin, 25 km west of Berlin. The CO2 was stored in porous sandstones of the Upper Triassic Stuttgart Formation at a depth of 630 to 650 m. In more than a decade, GFZ has developed and tested an extraordinary multi-monitoring concept for onshore CO2 storages which mainly comprises the following methods: Time-lapse 3D seismic surveying is the most commonly used method for imaging and monitoring a CO2-plume in the deep underground before, during and after the injection phase. Such campaigns require high logistical and financial efforts and can be realised only to a limited extent. At Ketzin, for instance, 3D-seismic repeat surveys were acquired using several thousand surface acquisition points and lasting over two or three months. Alternative approaches include permanently buried seismic receivers. Geoelectric measurements in Ketzin are mainly applied by using a permanent downhole electrode installation (Vertical Electrical Resistivity Array = VERA) which has been implemented in three wells behind the well casings. Measurements between 590 m to 735 m are constantly carried out covering the vertical thickness of the entire CO2 storage horizon. Valuable results were achieved by a combination of inhole, crosshole and surface downhole measurements which has been carried out with appropriate acquisition geometries. For focused areas around monitoring wells, geoelectric methods may support and supplement information from seismic surveys. Borehole monitoring of pressure and temperature are generally indispensable for every underground gas storage type. In Ketzin, a remote monitoring system for all wells has been installed that constantly provides the operators with values for date, time, downhole and wellhead pressure, depth, and temperature. Moreover, all wellheads are checked weekly during onsite inspections. Samples for chemical analysis are taken in regular intervals from an observation well. With a total depth of 418 m, the well reaches the natural brine filled sandstones of the Triassic Exter Formation which represents the layer straight upon the caprock of the CO2 reservoir. Fluid samples are being analysed for stable carbon isotopes 13C, dissolved organic carbon (DIC) and pH. Any significant intrusion of CO2 into this aquifer would cause distinct anomalies and trigger alarm conditions. Another regularly applied monitoring method in Ketzin is the measurement of soil CO2 flux. Natural CO2 flux is generated by the respiration of roots and soil organisms and the decomposition of organic matter. Both processes very much depend on the seasons respectively on the soil temperature. Outliers of the natural background range could indicate a leakage in the reservoir.

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 Datum: 2016
 Publikationsstatus: Final veröffentlicht
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: GFZPOF: p3 PT5 Georesources
 Art des Abschluß: -

Veranstaltung

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Titel: General Assembly European Geosciences Union
Veranstaltungsort: Vienna, Austria
Start-/Enddatum: 2016-04-17 - 2016-04-22

Entscheidung

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Projektinformation

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Quelle 1

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Titel: Geophysical Research Abstracts
Genre der Quelle: Reihe
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: Vol. 18, EGU2016-3897 Artikelnummer: - Start- / Endseite: - Identifikator: -