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Multiscale Characterisation of Fracture Patterns of a Crystalline Reservoir Analogue

Bossennec, Claire ; Frey, Matthis ; Seib, Lukas ; Bär, Kristian ; Sass, Ingo (2021):
Multiscale Characterisation of Fracture Patterns of a Crystalline Reservoir Analogue.
In: Geosciences, 11 (9), p. 371. ISSN 2076-3263,
DOI: 10.3390/geosciences11090371,
[Article]

Abstract

For an accurate multiscale property modelling of fractured crystalline geothermal reservoirs, an enhanced characterisation of the geometrical features and variability of the fracture network properties is an essential prerequisite. Combining regional digital elevation model analysis and local outcrop investigation, the study comprises the characterisation of the fracture pattern of a crystalline reservoir analogue in the Northern Odenwald, with LiDAR and GIS structural interpretation. This approach provides insights into the 3D architecture of the fault and fracture network, its clustering, and its connectivity. Mapped discontinuities show a homogeneous length distribution, which follows a power law with a −2.03 scaling factor. The connectivity of the fracture network is heterogenous, due to a fault control at the hectometric scale. Clustering is marked by long sub-vertical fractures at the outcrop scale, and strongly enhance heterogeneity around weathered fracture and fault corridors. The multi-variable dataset created within this study can be used as input data for accurate discrete fracture networks and fluid-flow modelling of reservoirs of similar type.

Item Type: Article
Erschienen: 2021
Creators: Bossennec, Claire ; Frey, Matthis ; Seib, Lukas ; Bär, Kristian ; Sass, Ingo
Title: Multiscale Characterisation of Fracture Patterns of a Crystalline Reservoir Analogue
Language: English
Abstract:

For an accurate multiscale property modelling of fractured crystalline geothermal reservoirs, an enhanced characterisation of the geometrical features and variability of the fracture network properties is an essential prerequisite. Combining regional digital elevation model analysis and local outcrop investigation, the study comprises the characterisation of the fracture pattern of a crystalline reservoir analogue in the Northern Odenwald, with LiDAR and GIS structural interpretation. This approach provides insights into the 3D architecture of the fault and fracture network, its clustering, and its connectivity. Mapped discontinuities show a homogeneous length distribution, which follows a power law with a −2.03 scaling factor. The connectivity of the fracture network is heterogenous, due to a fault control at the hectometric scale. Clustering is marked by long sub-vertical fractures at the outcrop scale, and strongly enhance heterogeneity around weathered fracture and fault corridors. The multi-variable dataset created within this study can be used as input data for accurate discrete fracture networks and fluid-flow modelling of reservoirs of similar type.

Journal or Publication Title: Geosciences
Journal Volume: 11
Issue Number: 9
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Earth Science
11 Department of Materials and Earth Sciences > Earth Science > Geothermal Science and Technology
Date Deposited: 15 Sep 2021 06:37
DOI: 10.3390/geosciences11090371
URL / URN: https://www.mdpi.com/2076-3263/11/9/371
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