3-D geomechanical–numerical model of the contemporary crustal stress state in the Alberta Basin (Canada)
In the context of examining the potential usage of safe and sustainable geothermal energy in the Alberta Basin, whether in deep sediments or crystalline rock, the understanding of the in situ stress state is crucial. It is a key challenge to estimate the 3-D stress state at an arbitrarily chosen poi...
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ftdoajarticles:oai:doaj.org/article:bebae39a285d4d6ab21bf393fc23841e 2023-05-15T17:54:51+02:00 3-D geomechanical–numerical model of the contemporary crustal stress state in the Alberta Basin (Canada) K. Reiter O. Heidbach 2014-11-01T00:00:00Z https://doi.org/10.5194/se-5-1123-2014 https://doaj.org/article/bebae39a285d4d6ab21bf393fc23841e EN eng Copernicus Publications http://www.solid-earth.net/5/1123/2014/se-5-1123-2014.pdf https://doaj.org/toc/1869-9510 https://doaj.org/toc/1869-9529 1869-9510 1869-9529 doi:10.5194/se-5-1123-2014 https://doaj.org/article/bebae39a285d4d6ab21bf393fc23841e Solid Earth, Vol 5, Iss 2, Pp 1123-1149 (2014) Geology QE1-996.5 Stratigraphy QE640-699 article 2014 ftdoajarticles https://doi.org/10.5194/se-5-1123-2014 2022-12-31T00:56:58Z In the context of examining the potential usage of safe and sustainable geothermal energy in the Alberta Basin, whether in deep sediments or crystalline rock, the understanding of the in situ stress state is crucial. It is a key challenge to estimate the 3-D stress state at an arbitrarily chosen point in the crust, based on sparsely distributed in situ stress data. To address this challenge, we present a large-scale 3-D geomechanical–numerical model (700 km × 1200 km × 80 km) from a large portion of the Alberta Basin, to provide a 3-D continuous quantification of the contemporary stress orientations and stress magnitudes. To calibrate the model, we use a large database of in situ stress orientation (321 S Hmax ) as well as stress magnitude data (981 S V , 1720 S hmin and 2 (+11) S Hmax ) from the Alberta Basin. To find the best-fit model, we vary the material properties and primarily the displacement boundary conditions of the model. This study focusses in detail on the statistical calibration procedure, because of the large amount of available data, the diversity of data types, and the importance of the order of data tests. The best-fit model provides the total 3-D stress tensor for nearly the whole Alberta Basin, and allows estimation of stress orientation and stress magnitudes in advance of any well. First-order implications for the well design and configuration of enhanced geothermal systems are revealed. Systematic deviations of the modelled stress from the in situ data are found for stress orientations in the Peace River and the Bow Island Arch as well as for leak-off test magnitudes. Article in Journal/Newspaper Peace River Directory of Open Access Journals: DOAJ Articles Canada Solid Earth 5 2 1123 1149 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geology QE1-996.5 Stratigraphy QE640-699 |
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Geology QE1-996.5 Stratigraphy QE640-699 K. Reiter O. Heidbach 3-D geomechanical–numerical model of the contemporary crustal stress state in the Alberta Basin (Canada) |
topic_facet |
Geology QE1-996.5 Stratigraphy QE640-699 |
description |
In the context of examining the potential usage of safe and sustainable geothermal energy in the Alberta Basin, whether in deep sediments or crystalline rock, the understanding of the in situ stress state is crucial. It is a key challenge to estimate the 3-D stress state at an arbitrarily chosen point in the crust, based on sparsely distributed in situ stress data. To address this challenge, we present a large-scale 3-D geomechanical–numerical model (700 km × 1200 km × 80 km) from a large portion of the Alberta Basin, to provide a 3-D continuous quantification of the contemporary stress orientations and stress magnitudes. To calibrate the model, we use a large database of in situ stress orientation (321 S Hmax ) as well as stress magnitude data (981 S V , 1720 S hmin and 2 (+11) S Hmax ) from the Alberta Basin. To find the best-fit model, we vary the material properties and primarily the displacement boundary conditions of the model. This study focusses in detail on the statistical calibration procedure, because of the large amount of available data, the diversity of data types, and the importance of the order of data tests. The best-fit model provides the total 3-D stress tensor for nearly the whole Alberta Basin, and allows estimation of stress orientation and stress magnitudes in advance of any well. First-order implications for the well design and configuration of enhanced geothermal systems are revealed. Systematic deviations of the modelled stress from the in situ data are found for stress orientations in the Peace River and the Bow Island Arch as well as for leak-off test magnitudes. |
format |
Article in Journal/Newspaper |
author |
K. Reiter O. Heidbach |
author_facet |
K. Reiter O. Heidbach |
author_sort |
K. Reiter |
title |
3-D geomechanical–numerical model of the contemporary crustal stress state in the Alberta Basin (Canada) |
title_short |
3-D geomechanical–numerical model of the contemporary crustal stress state in the Alberta Basin (Canada) |
title_full |
3-D geomechanical–numerical model of the contemporary crustal stress state in the Alberta Basin (Canada) |
title_fullStr |
3-D geomechanical–numerical model of the contemporary crustal stress state in the Alberta Basin (Canada) |
title_full_unstemmed |
3-D geomechanical–numerical model of the contemporary crustal stress state in the Alberta Basin (Canada) |
title_sort |
3-d geomechanical–numerical model of the contemporary crustal stress state in the alberta basin (canada) |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://doi.org/10.5194/se-5-1123-2014 https://doaj.org/article/bebae39a285d4d6ab21bf393fc23841e |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Peace River |
genre_facet |
Peace River |
op_source |
Solid Earth, Vol 5, Iss 2, Pp 1123-1149 (2014) |
op_relation |
http://www.solid-earth.net/5/1123/2014/se-5-1123-2014.pdf https://doaj.org/toc/1869-9510 https://doaj.org/toc/1869-9529 1869-9510 1869-9529 doi:10.5194/se-5-1123-2014 https://doaj.org/article/bebae39a285d4d6ab21bf393fc23841e |
op_doi |
https://doi.org/10.5194/se-5-1123-2014 |
container_title |
Solid Earth |
container_volume |
5 |
container_issue |
2 |
container_start_page |
1123 |
op_container_end_page |
1149 |
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1766162705756979200 |