dc.contributor.advisor |
Aigner, Thomas (Prof. Dr.) |
|
dc.contributor.author |
Wolpert, Philipp |
|
dc.date.accessioned |
2021-04-16T10:45:01Z |
|
dc.date.available |
2021-04-16T10:45:01Z |
|
dc.date.issued |
2023-02-01 |
|
dc.identifier.uri |
http://hdl.handle.net/10900/114309 |
|
dc.identifier.uri |
http://nbn-resolving.de/urn:nbn:de:bsz:21-dspace-1143098 |
de_DE |
dc.identifier.uri |
http://dx.doi.org/10.15496/publikation-55684 |
|
dc.description.abstract |
This study systematically investigates the geothermal reservoir properties of the
approximately 500-600 m thick Upper Jurassic carbonates in the subsurface of the
Molasse basin, where only specific intervals contribute to the geothermal aquifer.
Therefore, this study integrates all relevant aspects of geothermal reservoir
characterization in carbonates following an 1-D (core and well data) to 2-D (correlations)
to 3-D (seismic interpretation and integration) approach. This hierarchical workflow, which
is based on reservoir characterization workflows established by the hydrocarbon industry
is then modified to understand the characteristics and distribution of geothermal reservoir
types involving the following steps: (1) core-based facies analysis, (2) borehole image and
well log analysis, (3) sequence-stratigraphic framework, (4) interpretation of depositional
environments, (5) identification of potential reservoir types and (6) integration of dynamic
data.
The core-based facies analysis reveals twentytwo lithofacies types, three depositional
sequences for the Upper Jurassic and one for the Upper Jurassic/Lower Cretaceous
Purbeck Formation. Large parts of the interpreted depositional environment correspond
to a relatively deep (below storm-wave base) deposetting. Towards the top of the
succession, a change to a shallower, higher water energy environment is observed, with
clear indications of exposure.
A newly established multi-proxy workflow for borehole image interpretation in carbonates
reveals novel opportunities to link the core-based observations with the borehole images
and shows how to maximize the value of information of such logs. The vertical stacking of
nine distinct borehole image facies types, as well as a semi-quantitative charting of stratal
surfaces, provided new insights into the sequence-stratigraphic development and the
characterization of geothermal reservoir types.
The evaluation of the 3D seismic survey yielded a best practice approach to differentiate
three dominating seismic facies types based on their reflectivity and to differentiate
between potential reservoir facies and non-reservoir facies. The results of the 1-D and 2-
D analysis were used to validate the interpretation on various scales and draw 4
conclusions, that can be applied directly to the early exploration stage of emerging
geothermal projects in the Molasse basin.
The local, regional and basin-wide sequence-stratigraphic correlation show thickness
variations of the Upper Jurassic carbonates. The integration of paleotectonic aspects into
the sequence-stratigraphic interpretation adds to the understanding of these thickness
variations. Along with the thickness variations, a change of depositional environment and
facies types were documented. All these factors affect the characteristics and the
distribution of potential geothermal reservoir types.
Ultimately, the integration of dynamic data allows a ranking of the geothermal reservoir
types and a subdivision into “high-k dominated” and “matrix-dominated” geothermal
reservoir types. It shows that the investigated Upper Jurassic geothermal field of the study
area is a combination of structural and stratigraphic traps. The sequence stratigraphic
context explains the distribution of the preferential fluid pathways and is a crucial element
for a successful and sustainable geothermal development strategy in Upper Jurassic
carbonates. |
en |
dc.language.iso |
en |
de_DE |
dc.publisher |
Universität Tübingen |
de_DE |
dc.rights |
ubt-podok |
de_DE |
dc.rights.uri |
http://tobias-lib.uni-tuebingen.de/doku/lic_mit_pod.php?la=de |
de_DE |
dc.rights.uri |
http://tobias-lib.uni-tuebingen.de/doku/lic_mit_pod.php?la=en |
en |
dc.subject.ddc |
550 |
de_DE |
dc.subject.other |
Upper Jurassic |
en |
dc.subject.other |
Sequence Stratigraphy |
en |
dc.subject.other |
Geothermal Reservoirs |
en |
dc.subject.other |
South Germany |
en |
dc.title |
Upper Jurassic Geothermal Reservoirs of South Germany: Characterization and novel exploration strategy using an integrated sequence stratigraphic approach |
en |
dc.type |
PhDThesis |
de_DE |
dcterms.dateAccepted |
2021-02-01 |
|
utue.publikation.fachbereich |
Geographie, Geoökologie, Geowissenschaft |
de_DE |
utue.publikation.fakultaet |
7 Mathematisch-Naturwissenschaftliche Fakultät |
de_DE |
utue.publikation.noppn |
yes |
de_DE |