Fracture Detection And Characterization
The effects of fractures on full waveform acoustic logs are studied on the basis of field observations, available theoretical models, and a series of ultrasonic laboratory experiments. Results from diffusion models applicable to fine microfractures and finite difference models of isolated fractures...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Technical Report |
| Published: |
Massachusetts Institute of Technology. Earth Resources Laboratory
2012
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| Online Access: | http://hdl.handle.net/1721.1/75102 |
| _version_ | 1811070134941384704 |
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| author | Toksoz, M. Nafi Guler, Fatih |
| author2 | Massachusetts Institute of Technology. Earth Resources Laboratory |
| author_facet | Massachusetts Institute of Technology. Earth Resources Laboratory Toksoz, M. Nafi Guler, Fatih |
| author_sort | Toksoz, M. Nafi |
| collection | MIT |
| description | The effects of fractures on full waveform acoustic logs are studied on the basis of field
observations, available theoretical models, and a series of ultrasonic laboratory experiments. Results from diffusion models applicable to fine microfractures and finite difference models of isolated fractures are reviewed. Laboratory experiments are carried
out with fine microfractures around the borehole in a Lucite model, and isolated single
fractures in aluminum models. Cases of horizontal and inclined (45°) fractures are
studied as a function of fracture aperture and frequency of Stoneley waves. A vertical
fracture model is also studied. Results indicate that the effect of different fractures are manifested differently on P, S, pseudo-Rayleigh, and Stoneley waves. Micro-fractures
surrounding a borehole attenuate Stoneley waves most strongly. Vertical fractures attenuate Stoneley waves more strongly than other phases in the wave train. Horizontal
and inclined fractures have a greater effect on P and S waves than on Stoneley waves. |
| first_indexed | 2024-09-23T08:26:58Z |
| format | Technical Report |
| id | mit-1721.1/75102 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T08:26:58Z |
| publishDate | 2012 |
| publisher | Massachusetts Institute of Technology. Earth Resources Laboratory |
| record_format | dspace |
| spelling | mit-1721.1/751022019-04-09T18:17:04Z Fracture Detection And Characterization Toksoz, M. Nafi Guler, Fatih Massachusetts Institute of Technology. Earth Resources Laboratory Toksoz, M. Nafi Guler, Fatih The effects of fractures on full waveform acoustic logs are studied on the basis of field observations, available theoretical models, and a series of ultrasonic laboratory experiments. Results from diffusion models applicable to fine microfractures and finite difference models of isolated fractures are reviewed. Laboratory experiments are carried out with fine microfractures around the borehole in a Lucite model, and isolated single fractures in aluminum models. Cases of horizontal and inclined (45°) fractures are studied as a function of fracture aperture and frequency of Stoneley waves. A vertical fracture model is also studied. Results indicate that the effect of different fractures are manifested differently on P, S, pseudo-Rayleigh, and Stoneley waves. Micro-fractures surrounding a borehole attenuate Stoneley waves most strongly. Vertical fractures attenuate Stoneley waves more strongly than other phases in the wave train. Horizontal and inclined fractures have a greater effect on P and S waves than on Stoneley waves. Massachusetts Institute of Technology. Full Waveform Acoustic Logging Consortium 2012-11-29T19:41:08Z 2012-11-29T19:41:08Z 1988 Technical Report http://hdl.handle.net/1721.1/75102 Earth Resources Laboratory Industry Consortia Annual Report;1988-07 application/pdf Massachusetts Institute of Technology. Earth Resources Laboratory |
| spellingShingle | Toksoz, M. Nafi Guler, Fatih Fracture Detection And Characterization |
| title | Fracture Detection And Characterization |
| title_full | Fracture Detection And Characterization |
| title_fullStr | Fracture Detection And Characterization |
| title_full_unstemmed | Fracture Detection And Characterization |
| title_short | Fracture Detection And Characterization |
| title_sort | fracture detection and characterization |
| url | http://hdl.handle.net/1721.1/75102 |
| work_keys_str_mv | AT toksozmnafi fracturedetectionandcharacterization AT gulerfatih fracturedetectionandcharacterization |