Real-Time Detection of Karstification Hazards While Drilling in Carbonates †
The nature of carbonate deposition can cause the development of unique geological features such as cavities and vugs called karsts. Encountering karsts while drilling can lead to serious consequences. To improve drilling safety in intervals of karstification, it is important to detect karsts as earl...
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Online Access: | https://hdl.handle.net/11250/3044800 https://doi.org/10.3390/en15144951 |
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ftntnutrondheimi:oai:ntnuopen.ntnu.no:11250/3044800 2023-05-15T15:38:56+02:00 Real-Time Detection of Karstification Hazards While Drilling in Carbonates † Maksimov, Danil Pavlov, Alexey Sangesland, Sigbjørn 2022 application/pdf https://hdl.handle.net/11250/3044800 https://doi.org/10.3390/en15144951 eng eng MDPI Energies. 2022, 15 (14), . urn:issn:1996-1073 https://hdl.handle.net/11250/3044800 https://doi.org/10.3390/en15144951 cristin:2058520 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no CC-BY 17 15 Energies 14 Peer reviewed Journal article 2022 ftntnutrondheimi https://doi.org/10.3390/en15144951 2023-01-25T23:43:10Z The nature of carbonate deposition can cause the development of unique geological features such as cavities and vugs called karsts. Encountering karsts while drilling can lead to serious consequences. To improve drilling safety in intervals of karstification, it is important to detect karsts as early as possible. The use of state-of-the-art geophysical methods cannot guarantee early or even real-time detection of karsts or karstification zones. In this paper we demonstrate, based on an analysis of 20 wells drilled in karstified carbonates in the Barents Sea, that a karst that is dangerous for drilling is often surrounded by one or more other karstification objects, thus forming a karstification zone. These zones can be detected in real time through certain patterns in drillstring mechanics and mud flow measurements. They can serve as indicators of intervals with a high likelihood of encountering karsts. The identified patterns corresponding to various karstification objects are summarized in a table and can be used by drilling engineers. Apart from that, these patterns can also be utilized for training machine learning algorithms for the automatic detection of karstification zones. publishedVersion Article in Journal/Newspaper Barents Sea NTNU Open Archive (Norwegian University of Science and Technology) Barents Sea |
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Open Polar |
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NTNU Open Archive (Norwegian University of Science and Technology) |
op_collection_id |
ftntnutrondheimi |
language |
English |
description |
The nature of carbonate deposition can cause the development of unique geological features such as cavities and vugs called karsts. Encountering karsts while drilling can lead to serious consequences. To improve drilling safety in intervals of karstification, it is important to detect karsts as early as possible. The use of state-of-the-art geophysical methods cannot guarantee early or even real-time detection of karsts or karstification zones. In this paper we demonstrate, based on an analysis of 20 wells drilled in karstified carbonates in the Barents Sea, that a karst that is dangerous for drilling is often surrounded by one or more other karstification objects, thus forming a karstification zone. These zones can be detected in real time through certain patterns in drillstring mechanics and mud flow measurements. They can serve as indicators of intervals with a high likelihood of encountering karsts. The identified patterns corresponding to various karstification objects are summarized in a table and can be used by drilling engineers. Apart from that, these patterns can also be utilized for training machine learning algorithms for the automatic detection of karstification zones. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Maksimov, Danil Pavlov, Alexey Sangesland, Sigbjørn |
spellingShingle |
Maksimov, Danil Pavlov, Alexey Sangesland, Sigbjørn Real-Time Detection of Karstification Hazards While Drilling in Carbonates † |
author_facet |
Maksimov, Danil Pavlov, Alexey Sangesland, Sigbjørn |
author_sort |
Maksimov, Danil |
title |
Real-Time Detection of Karstification Hazards While Drilling in Carbonates † |
title_short |
Real-Time Detection of Karstification Hazards While Drilling in Carbonates † |
title_full |
Real-Time Detection of Karstification Hazards While Drilling in Carbonates † |
title_fullStr |
Real-Time Detection of Karstification Hazards While Drilling in Carbonates † |
title_full_unstemmed |
Real-Time Detection of Karstification Hazards While Drilling in Carbonates † |
title_sort |
real-time detection of karstification hazards while drilling in carbonates † |
publisher |
MDPI |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/3044800 https://doi.org/10.3390/en15144951 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea |
genre_facet |
Barents Sea |
op_source |
17 15 Energies 14 |
op_relation |
Energies. 2022, 15 (14), . urn:issn:1996-1073 https://hdl.handle.net/11250/3044800 https://doi.org/10.3390/en15144951 cristin:2058520 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3390/en15144951 |
_version_ |
1766370359390502912 |