Predicting fluid pressure in sedimentary basins from seismic tomography
SUMMARY Gravitational compaction of thick (2–10 km) sediment accumulations in sedimentary basins is controlled by the interplay of mechanical and chemical processes that operate over many orders of magnitude in spatial scale. The compaction of sediments into rock typically involves a density increas...
Published in: | Geophysical Journal International |
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Oxford University Press (OUP)
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Online Access: | http://dx.doi.org/10.1093/gji/ggz378 http://academic.oup.com/gji/advance-article-pdf/doi/10.1093/gji/ggz378/29452989/ggz378.pdf http://academic.oup.com/gji/article-pdf/219/2/1421/29807114/ggz378.pdf |
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croxfordunivpr:10.1093/gji/ggz378 2023-06-18T03:42:04+02:00 Predicting fluid pressure in sedimentary basins from seismic tomography O’Reilly, Brian M Prada, Manel Lavoué, François Lebedev, Sergei Science Foundation Ireland European Regional Development Fund 2019 http://dx.doi.org/10.1093/gji/ggz378 http://academic.oup.com/gji/advance-article-pdf/doi/10.1093/gji/ggz378/29452989/ggz378.pdf http://academic.oup.com/gji/article-pdf/219/2/1421/29807114/ggz378.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model Geophysical Journal International volume 219, issue 2, page 1421-1430 ISSN 0956-540X 1365-246X Geochemistry and Petrology Geophysics journal-article 2019 croxfordunivpr https://doi.org/10.1093/gji/ggz378 2023-06-02T09:25:26Z SUMMARY Gravitational compaction of thick (2–10 km) sediment accumulations in sedimentary basins is controlled by the interplay of mechanical and chemical processes that operate over many orders of magnitude in spatial scale. The compaction of sediments into rock typically involves a density increase of ≈500 to 1000 kg m−3, occurring over a depth-scale of several kilometres. The volume decrease in the compacting sediments releases vast volumes of water, which plays an important part in the global hydrological cycle and also in tectonic and geochemical processes; including the formation of hydrocarbon and mineral deposits. This study utilizes recently developed tomographic seismic images from the Porcupine Basin, which lies in the deep-water North Atlantic Ocean. A generic method for predicting fluid pressure variations that are driven by gravitational compaction is developed over the scale of the entire sedimentary basin. The methodology is grounded upon both observational evidence and empirically based theories, relying on geophysical measurements and relationships between sediment porosities and densities. The method is based upon physical concepts that are widely used in the petroleum industry and applied extensively in models of overpressure development in sedimentary basins. Geological and geophysical data from exploration wells are used to test the predictions of the method at two locations within the basin and are found to be in good agreement with the theory. Article in Journal/Newspaper North Atlantic Oxford University Press (via Crossref) Geophysical Journal International 219 2 1421 1430 |
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Open Polar |
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Oxford University Press (via Crossref) |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Geochemistry and Petrology Geophysics |
spellingShingle |
Geochemistry and Petrology Geophysics O’Reilly, Brian M Prada, Manel Lavoué, François Lebedev, Sergei Predicting fluid pressure in sedimentary basins from seismic tomography |
topic_facet |
Geochemistry and Petrology Geophysics |
description |
SUMMARY Gravitational compaction of thick (2–10 km) sediment accumulations in sedimentary basins is controlled by the interplay of mechanical and chemical processes that operate over many orders of magnitude in spatial scale. The compaction of sediments into rock typically involves a density increase of ≈500 to 1000 kg m−3, occurring over a depth-scale of several kilometres. The volume decrease in the compacting sediments releases vast volumes of water, which plays an important part in the global hydrological cycle and also in tectonic and geochemical processes; including the formation of hydrocarbon and mineral deposits. This study utilizes recently developed tomographic seismic images from the Porcupine Basin, which lies in the deep-water North Atlantic Ocean. A generic method for predicting fluid pressure variations that are driven by gravitational compaction is developed over the scale of the entire sedimentary basin. The methodology is grounded upon both observational evidence and empirically based theories, relying on geophysical measurements and relationships between sediment porosities and densities. The method is based upon physical concepts that are widely used in the petroleum industry and applied extensively in models of overpressure development in sedimentary basins. Geological and geophysical data from exploration wells are used to test the predictions of the method at two locations within the basin and are found to be in good agreement with the theory. |
author2 |
Science Foundation Ireland European Regional Development Fund |
format |
Article in Journal/Newspaper |
author |
O’Reilly, Brian M Prada, Manel Lavoué, François Lebedev, Sergei |
author_facet |
O’Reilly, Brian M Prada, Manel Lavoué, François Lebedev, Sergei |
author_sort |
O’Reilly, Brian M |
title |
Predicting fluid pressure in sedimentary basins from seismic tomography |
title_short |
Predicting fluid pressure in sedimentary basins from seismic tomography |
title_full |
Predicting fluid pressure in sedimentary basins from seismic tomography |
title_fullStr |
Predicting fluid pressure in sedimentary basins from seismic tomography |
title_full_unstemmed |
Predicting fluid pressure in sedimentary basins from seismic tomography |
title_sort |
predicting fluid pressure in sedimentary basins from seismic tomography |
publisher |
Oxford University Press (OUP) |
publishDate |
2019 |
url |
http://dx.doi.org/10.1093/gji/ggz378 http://academic.oup.com/gji/advance-article-pdf/doi/10.1093/gji/ggz378/29452989/ggz378.pdf http://academic.oup.com/gji/article-pdf/219/2/1421/29807114/ggz378.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Geophysical Journal International volume 219, issue 2, page 1421-1430 ISSN 0956-540X 1365-246X |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
op_doi |
https://doi.org/10.1093/gji/ggz378 |
container_title |
Geophysical Journal International |
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219 |
container_issue |
2 |
container_start_page |
1421 |
op_container_end_page |
1430 |
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1769007852852084736 |