Determination of Shear Wave Velocities in "Slow" Formations
Direct determination of formation shear wave travel time is impossible in "slow" formations where the shear wave velocity is lower than the borehole fluid (mud) velocity. However, the Stoneley waves in these formations are very sensitive to changes in formation shear wave properties and ca...
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| Other Authors: | |
| Format: | Technical Report |
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Massachusetts Institute of Technology. Earth Resources Laboratory
2012
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| Online Access: | http://hdl.handle.net/1721.1/75041 |
| _version_ | 1826208551002963968 |
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| author | Cheng, C. H. Toksoz, M. Nafi |
| author2 | Massachusetts Institute of Technology. Earth Resources Laboratory |
| author_facet | Massachusetts Institute of Technology. Earth Resources Laboratory Cheng, C. H. Toksoz, M. Nafi |
| author_sort | Cheng, C. H. |
| collection | MIT |
| description | Direct determination of formation shear wave travel time is impossible in "slow" formations where the shear wave velocity is lower than the borehole fluid (mud) velocity. However, the Stoneley waves in these formations are very sensitive to changes in formation shear wave properties and can be used to indirectly determine the formation shear velocity, In addition, the P wave packet is highly dependent on the Poisson's ratio and thus can be used to estimate the shear velocity once the P wave velocity is known. These phenomena are demonstrated with both numerical and field examples. |
| first_indexed | 2024-09-23T14:07:06Z |
| format | Technical Report |
| id | mit-1721.1/75041 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T14:07:06Z |
| publishDate | 2012 |
| publisher | Massachusetts Institute of Technology. Earth Resources Laboratory |
| record_format | dspace |
| spelling | mit-1721.1/750412019-04-12T20:28:08Z Determination of Shear Wave Velocities in "Slow" Formations Cheng, C. H. Toksoz, M. Nafi Massachusetts Institute of Technology. Earth Resources Laboratory Cheng, C. H. Toksoz, M. Nafi Direct determination of formation shear wave travel time is impossible in "slow" formations where the shear wave velocity is lower than the borehole fluid (mud) velocity. However, the Stoneley waves in these formations are very sensitive to changes in formation shear wave properties and can be used to indirectly determine the formation shear velocity, In addition, the P wave packet is highly dependent on the Poisson's ratio and thus can be used to estimate the shear velocity once the P wave velocity is known. These phenomena are demonstrated with both numerical and field examples. Massachusetts Institute of Technology. Full Waveform Acoustic Logging Consortium 2012-11-27T20:07:58Z 2012-11-27T20:07:58Z 1983 Technical Report http://hdl.handle.net/1721.1/75041 Earth Resources Laboratory Industry Consortia Annual Report;1983-02 application/pdf Massachusetts Institute of Technology. Earth Resources Laboratory |
| spellingShingle | Cheng, C. H. Toksoz, M. Nafi Determination of Shear Wave Velocities in "Slow" Formations |
| title | Determination of Shear Wave Velocities in "Slow" Formations |
| title_full | Determination of Shear Wave Velocities in "Slow" Formations |
| title_fullStr | Determination of Shear Wave Velocities in "Slow" Formations |
| title_full_unstemmed | Determination of Shear Wave Velocities in "Slow" Formations |
| title_short | Determination of Shear Wave Velocities in "Slow" Formations |
| title_sort | determination of shear wave velocities in slow formations |
| url | http://hdl.handle.net/1721.1/75041 |
| work_keys_str_mv | AT chengch determinationofshearwavevelocitiesinslowformations AT toksozmnafi determinationofshearwavevelocitiesinslowformations |