An approach for predicting stress-induced anisotropy around a borehole
Formation elastic properties near a borehole may be altered from their original state due to the stress concentration around the borehole. This could result in a biased estimation of formation properties but could provide a means to estimate in situ stress from sonic logging data. To properly accoun...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | en_US |
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Society of Exploration Geophysicists
2013
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| Online Access: | http://hdl.handle.net/1721.1/81404 https://orcid.org/0000-0002-8814-5495 https://orcid.org/0000-0002-4851-3089 https://orcid.org/0000-0002-4127-9891 |
| _version_ | 1826195113841262592 |
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| author | Fang, Xinding Fehler, Michael Zhu, Zhenya Chen, Tianrun Brown, Stephen Cheng, Arthur Toksoz, M. Nafi |
| author2 | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences |
| author_facet | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Fang, Xinding Fehler, Michael Zhu, Zhenya Chen, Tianrun Brown, Stephen Cheng, Arthur Toksoz, M. Nafi |
| author_sort | Fang, Xinding |
| collection | MIT |
| description | Formation elastic properties near a borehole may be altered from their original state due to the stress concentration around the borehole. This could result in a biased estimation of formation properties but could provide a means to estimate in situ stress from sonic logging data. To properly account for the formation property alteration, we propose an iterative numerical approach to calculate stress-induced anisotropy around a borehole by combining a rock physics model and a finite-element method. We tested the validity and accuracy of our approach by comparing numerical results to laboratory measurements of the stress-strain relation of a sample of Berea sandstone, which contains a borehole and is subjected to a uniaxial stress loading. Our iterative approach converges very fast and can be applied to calculate the spatially varying stiffness tensor of the formation around a borehole for any given stress state. |
| first_indexed | 2024-09-23T10:07:13Z |
| format | Article |
| id | mit-1721.1/81404 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:07:13Z |
| publishDate | 2013 |
| publisher | Society of Exploration Geophysicists |
| record_format | dspace |
| spelling | mit-1721.1/814042022-09-30T19:01:53Z An approach for predicting stress-induced anisotropy around a borehole Fang, Xinding Fehler, Michael Zhu, Zhenya Chen, Tianrun Brown, Stephen Cheng, Arthur Toksoz, M. Nafi Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Fang, Xinding Fehler, Michael Zhu, Zhenya Brown, Stephen Toksoz, M. Nafi Formation elastic properties near a borehole may be altered from their original state due to the stress concentration around the borehole. This could result in a biased estimation of formation properties but could provide a means to estimate in situ stress from sonic logging data. To properly account for the formation property alteration, we propose an iterative numerical approach to calculate stress-induced anisotropy around a borehole by combining a rock physics model and a finite-element method. We tested the validity and accuracy of our approach by comparing numerical results to laboratory measurements of the stress-strain relation of a sample of Berea sandstone, which contains a borehole and is subjected to a uniaxial stress loading. Our iterative approach converges very fast and can be applied to calculate the spatially varying stiffness tensor of the formation around a borehole for any given stress state. 2013-10-16T14:37:14Z 2013-10-16T14:37:14Z 2013-04 2012-04 Article http://purl.org/eprint/type/JournalArticle 0016-8033 1942-2156 http://hdl.handle.net/1721.1/81404 Fang, Xinding, Michael Fehler, Zhenya Zhu, Tianrun Chen, Stephen Brown, Arthur Cheng, and M. Nafi Toksoz. “An approach for predicting stress-induced anisotropy around a borehole.” GEOPHYSICS 78, no. 3 (April 11, 2013): D143-D150. © 2013 Society of Exploration Geophysicists https://orcid.org/0000-0002-8814-5495 https://orcid.org/0000-0002-4851-3089 https://orcid.org/0000-0002-4127-9891 en_US http://dx.doi.org/10.1190/geo2012-0145.1 Geophysics Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf Society of Exploration Geophysicists Society of Exploration Geophysicists |
| spellingShingle | Fang, Xinding Fehler, Michael Zhu, Zhenya Chen, Tianrun Brown, Stephen Cheng, Arthur Toksoz, M. Nafi An approach for predicting stress-induced anisotropy around a borehole |
| title | An approach for predicting stress-induced anisotropy around a borehole |
| title_full | An approach for predicting stress-induced anisotropy around a borehole |
| title_fullStr | An approach for predicting stress-induced anisotropy around a borehole |
| title_full_unstemmed | An approach for predicting stress-induced anisotropy around a borehole |
| title_short | An approach for predicting stress-induced anisotropy around a borehole |
| title_sort | approach for predicting stress induced anisotropy around a borehole |
| url | http://hdl.handle.net/1721.1/81404 https://orcid.org/0000-0002-8814-5495 https://orcid.org/0000-0002-4851-3089 https://orcid.org/0000-0002-4127-9891 |
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