 |
| Titel |
Current status of the modelling activities at the Ketzin CO2 storage site |
| VerfasserIn |
Thomas Kempka, Holger Class, Uwe-Jens Görke, Olaf Kolditz, Mich. Kühn, Ursula Lengler, Inga Moeck, Ben Norden, Lena Walter, Björn Zehner |
| Konferenz |
EGU General Assembly 2011
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250055901
|
|
|
|
|
|
| Zusammenfassung |
| Static geological and dynamic flow modelling at the Ketzin storage site was conducted during
different phases of former projects depending on increasing data availability with time. First
modelling activities relevant for issues of permitting and operational site design were
conducted based on pre-existing information extracted from data of wells drilled nearby the
planned injection site and natural analogues. For that purpose, simplified radially symmetric
models were applied until a first version of the static geological 3D model was
available.
Using this preliminary 3D model first predictions of CO2 arrival time at the observation
wells were made with different simulators resulting in a reasonable agreement with the later
real arrival time depending on the choice of injection rate and boundary conditions.
Subsequent to the drilling of the three wells at the Ketzin site, well data was available for the
further development of the static geological model followed by simulations to predict
the CO2 arrival times at both observation wells. The numerical simulation codes
ECLIPSE 100 (black-oil simulator), ECLIPSE 300 (compositional CO2STORE)
and MUFTE-UG (2p2ni_CO2) were used for a history match applying the real
injection rates. Regarding the real injection regime the computational results show a
relatively good agreement with the data effectively measured at the first observation
well.
However, the real arrival time at the second observation well exceeded the calculated ones
by a factor of three. Uncertainties related to the geological model and parameter
choices made by the modellers as well as in the conceptual approaches applied
in the different simulators are currently being discussed in detail to reflect these
deviations.
Further studies, such as the implementation of heterogeneities at the facies-scale (low
permeability barrier between the injection and second observation well) revealed one
reasonable explanation for the late arrival. Nevertheless, further research on the sensitivity of
input parameters is currently conducted within the scope of the CO2MAN project involving
integration of recent geophysical monitoring data and extensive reservoir simulations to
improve the understanding of the geological heterogeneities at the Ketzin site and their
impact on the CO2 plume distribution. |
|
|
|
|
|
|