KIT | KIT-Bibliothek | Impressum | Datenschutz

Evaluation of the representative elementary volume (REV) of a geothermal fractured sandstone reservoir in North Germany

Müller, C.; Siegesmund, S.; Blum, P.

Abstract:

The objective of this study is to evaluate a representative elementary volume (REV) in a fractured geothermal sandstone reservoir in Germany using the discrete fracture network (DFN) model approach. Due to the lack of in situ data from the deep geothermal reservoir, field measurements of outcrop reservoir analogues were conducted to get a quantitative description of the DFN. Field measurements reveal that the geometry of the DFN is largely influenced by the lithological layering (e.g. relationship between joint spacing and bed thickness). Thus, DFN models have to be completed individually for each layer since each bed is distinct compared to its neighbouring beds. Various DFNs were generated using statistical-derived fracture input data. The two-dimensional universal distinct element code UDEC was used for fracture flow simulations. In order to determine the minimum REV, the equivalent average conductivity tensors were obtained with increasing block size. Plots of conductivity tensor coefficients versus block size exhibit only minor variation of the hydraulic properties with increasing block size. Hence, an REV size of 10 m × 10 m could be determined for all studied stochastically derived discrete fracture networks.


Verlagsausgabe §
DOI: 10.5445/IR/1000025925
Veröffentlicht am 03.01.2019
Originalveröffentlichung
DOI: 10.1007/s12665-010-0485-7
Scopus
Zitationen: 47
Web of Science
Zitationen: 46
Dimensions
Zitationen: 47
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Geowissenschaften (AGW)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2010
Sprache Englisch
Identifikator ISSN: 1866-6280, 1866-6299
urn:nbn:de:swb:90-259259
KITopen-ID: 1000025925
HGF-Programm 35.14.01 (POF II, LK 01)
Erschienen in Environmental earth sciences
Verlag Springer
Band 61
Heft 8
Seiten 1713-1724
Schlagwörter Geothermal energy, Numerical methods, Discrete fracture network, Fracture flow, Sedimentary rocks, Universal distinct element code UDEC, Buntsandstein
Nachgewiesen in Dimensions
Web of Science
Scopus
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page