An approach for wellbore failure analysis using rock cavings and image processing
There have been interests to link different cuttings/cavings to various wellbore failure types during drilling. This concept is essential when caliper and image logs are not available. Identification of wellbore failure during drilling gives more chance of immediate actions before wireline logging p...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Published: |
Kexue Chubanshe
2018
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| Online Access: | http://hdl.handle.net/20.500.11937/69509 |
| _version_ | 1848762060372967424 |
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| author | Skea, C. Rezagholilou, Ali Behnoud Far, P. Gholami, Raoof Sarmadivleh, M. |
| author_facet | Skea, C. Rezagholilou, Ali Behnoud Far, P. Gholami, Raoof Sarmadivleh, M. |
| author_sort | Skea, C. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | There have been interests to link different cuttings/cavings to various wellbore failure types during drilling. This concept is essential when caliper and image logs are not available. Identification of wellbore failure during drilling gives more chance of immediate actions before wireline logging program. In this paper, an approach was presented based on the image processing of ditch cuttings. This approach uses the sphericity and roundness of cuttings as input data to classify caving types and subsequently determine the dominant failure type. Likewise, common definitions of cavings were discussed initially before a new criterion is suggested. This quantitative criterion was examined by observations from caliper and acoustic image logs as well. The proposed approach and criterion were implemented on ditch cuttings taken from a well in Western Australia. Results indicate that the primary failure is shear failure (breakout) due to high levels of angular cavings. However, another failure due to the fluid invasion into pre-existing fractures was also recorded by blocky cavings. |
| first_indexed | 2025-11-14T10:41:34Z |
| format | Journal Article |
| id | curtin-20.500.11937-69509 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:41:34Z |
| publishDate | 2018 |
| publisher | Kexue Chubanshe |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-695092019-01-31T07:43:11Z An approach for wellbore failure analysis using rock cavings and image processing Skea, C. Rezagholilou, Ali Behnoud Far, P. Gholami, Raoof Sarmadivleh, M. There have been interests to link different cuttings/cavings to various wellbore failure types during drilling. This concept is essential when caliper and image logs are not available. Identification of wellbore failure during drilling gives more chance of immediate actions before wireline logging program. In this paper, an approach was presented based on the image processing of ditch cuttings. This approach uses the sphericity and roundness of cuttings as input data to classify caving types and subsequently determine the dominant failure type. Likewise, common definitions of cavings were discussed initially before a new criterion is suggested. This quantitative criterion was examined by observations from caliper and acoustic image logs as well. The proposed approach and criterion were implemented on ditch cuttings taken from a well in Western Australia. Results indicate that the primary failure is shear failure (breakout) due to high levels of angular cavings. However, another failure due to the fluid invasion into pre-existing fractures was also recorded by blocky cavings. 2018 Journal Article http://hdl.handle.net/20.500.11937/69509 10.1016/j.jrmge.2018.04.011 http://creativecommons.org/licenses/by-nc-nd/4.0/ Kexue Chubanshe fulltext |
| spellingShingle | Skea, C. Rezagholilou, Ali Behnoud Far, P. Gholami, Raoof Sarmadivleh, M. An approach for wellbore failure analysis using rock cavings and image processing |
| title | An approach for wellbore failure analysis using rock cavings and image processing |
| title_full | An approach for wellbore failure analysis using rock cavings and image processing |
| title_fullStr | An approach for wellbore failure analysis using rock cavings and image processing |
| title_full_unstemmed | An approach for wellbore failure analysis using rock cavings and image processing |
| title_short | An approach for wellbore failure analysis using rock cavings and image processing |
| title_sort | approach for wellbore failure analysis using rock cavings and image processing |
| url | http://hdl.handle.net/20.500.11937/69509 |