 |
| Titel |
Enhancing the revision of the static geological model of the Stuttgart Formation at the Ketzin pilot site by integration of reservoir simulations and 3D seismics |
| VerfasserIn |
Thomas Kempka, Ben Norden, Alexandra Ivanova, Stefan Lüth |
| Konferenz |
EGU General Assembly 2017
|
| Medientyp |
Artikel
|
| Sprache |
en
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250151638
|
| Publikation (Nr.) |
 EGU/EGU2017-16380.pdf |
|
|
|
|
|
| Zusammenfassung |
| Pilot-scale carbon dioxide storage has been performed at the Ketzin pilot site in Germany
from June 2007 to August 2013 with about 67 kt of CO2 injected into the Upper Triassic
Stuttgart Formation. In this context, the main aims focussed on verification of the technical
feasibility of CO2 storage in saline aquifers and development of efficient strategies for CO2
behaviour monitoring and prediction.
A static geological model has been already developed at an early stage of this
undertaking, and continuously revised with the availability of additional geological and
operational data as well as by means of reservoir simulations, allowing for revisions in line
with the efforts to achieve a solid history match in view of well bottomhole pressures and
CO2 arrival times at the observation wells. Three 3D seismic campaigns followed the 2005
3D seismic baseline in 2009, 2012 and 2015. Consequently, the interpreted seismic data on
spatial CO2 thickness distributions in the storage reservoir as well as seismic CO2 detection
limits from recent conformity studies enabled us to enhance the previous history-matching
results by adding a spatial component to the previous observations, limited to points
only.
For that purpose, we employed the latest version of the history-matched static geological
reservoir model and revised the gridding scheme of the reservoir simulation model by
coarsening and introducing local grid refinements at the areas of interest. Further
measures to ensure computational efficiency included the application of the MUFITS
reservoir simulator (BLACKOIL module) with PVT data derived from the MUFITS
GASSTORE module. Observations considered in the inverse model calibration for a
simulation time of about 5 years included well bottomhole pressures, CO2 arrival times
and seismically determined CO2 thickness maps for 2009 and 2012. Pilot points
were employed by means of the PEST++ inverse simulation framework to apply
permeability multipliers, interpolated by kriging to the reservoir simulation model
grid.
Our results exhibit an excellent well bottomhole pressure match, good agreement with the
observed CO2 arrival times at the observation wells, a reasonable agreement of the spatial
CO2 distribution with the CO2 thickness maps derived from the 2009, 2012 and 2015 3D
seismic campaigns as well as a good agreement with hydraulic tests conducted before
CO2 injection. Hence, the inversely determined permeability multipliers provide an
excellent basis for further revision of the static geological model of the Stuttgart
Formation. |
|
|
|
|
|
|