Prediction and early detection of karsts for safer drilling in carbonates
Underestimation of drilling hazards in carbonates can lead to serious consequences to personnel and the environment. The history of drilling in carbonates has shown that the vast majority of drilling incidents are associated with drilling through unique carbonate features called karsts. Karsts come...
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NTNU
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ftntnutrondheimi:oai:ntnuopen.ntnu.no:11250/3009480 2023-05-15T15:39:10+02:00 Prediction and early detection of karsts for safer drilling in carbonates Maksimov, Danil Pavlov, Alexey Sangesland, Sigbjørn 2022 application/pdf https://hdl.handle.net/11250/3009480 eng eng NTNU Doctoral theses at NTNU;2022:108 urn:isbn:978-82-326-5465-9 urn:issn:2703-8084 https://hdl.handle.net/11250/3009480 VDP::Technology: 500::Rock and petroleum disciplines: 510 Doctoral thesis 2022 ftntnutrondheimi 2022-08-03T22:40:16Z Underestimation of drilling hazards in carbonates can lead to serious consequences to personnel and the environment. The history of drilling in carbonates has shown that the vast majority of drilling incidents are associated with drilling through unique carbonate features called karsts. Karsts come in a variety of sizes and shapes such as cavities, caves and underground channels. Accidents associated with drilling through karsts can result in the loss of well control with subsequent problems. This can lead not only to operational delays or damage to expensive drilling equipment, and also to possible personnel injuries, loss of life or environmental catastrophes. This thesis studies different strategies, methods and technologies for safer drilling in karstified carbonates. It presents a general theoretical background of karstification phenomena and provides a description and classification of various karstification objects relevant for drilling. This classification enables the identification of important parameters of dangerous for drilling karsts. The obtained description and classification leads to a review of available technologies and methods that can be utilized for prediction or detection of dangerous for drilling karsts. This analysis reveals the gap in the available technologies for early detection of dangerous for drilling karsts. Based on in-depth analysis of an entire field in the Barents Sea, it is shown that karsts tend to appear in groups. This finding is utilized in a novel approach, where the not dangerous for drilling karst can be utilized as indicators of karstification zones. The analysis of the extensive set of field data, demonstrates that karstification objects can be detected from the analysis of certain patterns in real-time drilling data. These patterns serve as real-time indicators of karstification objects and zones. However these patterns often remain unforeseen during drilling. This work provides and tests a signal processing algorithm for automated karst-patterns detection. That can ... Doctoral or Postdoctoral Thesis Barents Sea NTNU Open Archive (Norwegian University of Science and Technology) Barents Sea |
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NTNU Open Archive (Norwegian University of Science and Technology) |
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English |
topic |
VDP::Technology: 500::Rock and petroleum disciplines: 510 |
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VDP::Technology: 500::Rock and petroleum disciplines: 510 Maksimov, Danil Prediction and early detection of karsts for safer drilling in carbonates |
topic_facet |
VDP::Technology: 500::Rock and petroleum disciplines: 510 |
description |
Underestimation of drilling hazards in carbonates can lead to serious consequences to personnel and the environment. The history of drilling in carbonates has shown that the vast majority of drilling incidents are associated with drilling through unique carbonate features called karsts. Karsts come in a variety of sizes and shapes such as cavities, caves and underground channels. Accidents associated with drilling through karsts can result in the loss of well control with subsequent problems. This can lead not only to operational delays or damage to expensive drilling equipment, and also to possible personnel injuries, loss of life or environmental catastrophes. This thesis studies different strategies, methods and technologies for safer drilling in karstified carbonates. It presents a general theoretical background of karstification phenomena and provides a description and classification of various karstification objects relevant for drilling. This classification enables the identification of important parameters of dangerous for drilling karsts. The obtained description and classification leads to a review of available technologies and methods that can be utilized for prediction or detection of dangerous for drilling karsts. This analysis reveals the gap in the available technologies for early detection of dangerous for drilling karsts. Based on in-depth analysis of an entire field in the Barents Sea, it is shown that karsts tend to appear in groups. This finding is utilized in a novel approach, where the not dangerous for drilling karst can be utilized as indicators of karstification zones. The analysis of the extensive set of field data, demonstrates that karstification objects can be detected from the analysis of certain patterns in real-time drilling data. These patterns serve as real-time indicators of karstification objects and zones. However these patterns often remain unforeseen during drilling. This work provides and tests a signal processing algorithm for automated karst-patterns detection. That can ... |
author2 |
Pavlov, Alexey Sangesland, Sigbjørn |
format |
Doctoral or Postdoctoral Thesis |
author |
Maksimov, Danil |
author_facet |
Maksimov, Danil |
author_sort |
Maksimov, Danil |
title |
Prediction and early detection of karsts for safer drilling in carbonates |
title_short |
Prediction and early detection of karsts for safer drilling in carbonates |
title_full |
Prediction and early detection of karsts for safer drilling in carbonates |
title_fullStr |
Prediction and early detection of karsts for safer drilling in carbonates |
title_full_unstemmed |
Prediction and early detection of karsts for safer drilling in carbonates |
title_sort |
prediction and early detection of karsts for safer drilling in carbonates |
publisher |
NTNU |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/3009480 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea |
genre_facet |
Barents Sea |
op_relation |
Doctoral theses at NTNU;2022:108 urn:isbn:978-82-326-5465-9 urn:issn:2703-8084 https://hdl.handle.net/11250/3009480 |
_version_ |
1766370621999022080 |