Detection and Characterization of Fractures from Generation of Tube Waves
Field testing has been conducted to evaluate a model which predicts the permeability and orientation of a permeable zone, in a deep water well in crystalline rock. Tube waves are generated by seismic P-waves incident on a fracture intersecting the borehole, a process observed in vertical seismic...
| 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/1721.1/75067 |
| _version_ | 1826188962293612544 |
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| author | Hardin, Ernest Toksoz, M. Nafi |
| author2 | Massachusetts Institute of Technology. Earth Resources Laboratory |
| author_facet | Massachusetts Institute of Technology. Earth Resources Laboratory Hardin, Ernest Toksoz, M. Nafi |
| author_sort | Hardin, Ernest |
| collection | MIT |
| description | Field testing has been conducted to evaluate a model which predicts the
permeability and orientation of a permeable zone, in a deep water well in crystalline
rock. Tube waves are generated by seismic P-waves incident on a fracture
intersecting the borehole, a process observed in vertical seismic profiling (VSP). The
behavior is explained by fluid exchange between the fracture and borehole, and the
observed efficiency of conversion is theoretically related to fracture permeability.
Additionally, fracture orientation may be obtained from multiple-source-offset VSP
surveys. Conventional temperature, caliper, resistivity and televiewer logs show the
presence of fractures and their orientation, and provide indirect evidence of
associated flow. Open fractures are simultaneously sampled over the full borehole
depth by hydrophone VSP methods. The tube wave generation model produces results
which compare favorably to independent estimates of fracture parameters. |
| first_indexed | 2024-09-23T08:07:23Z |
| format | Technical Report |
| id | mit-1721.1/75067 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T08:07:23Z |
| publishDate | 2012 |
| publisher | Massachusetts Institute of Technology. Earth Resources Laboratory |
| record_format | dspace |
| spelling | mit-1721.1/750672019-04-09T16:46:32Z Detection and Characterization of Fractures from Generation of Tube Waves Hardin, Ernest Toksoz, M. Nafi Massachusetts Institute of Technology. Earth Resources Laboratory Hardin, Ernest Toksoz, M. Nafi Field testing has been conducted to evaluate a model which predicts the permeability and orientation of a permeable zone, in a deep water well in crystalline rock. Tube waves are generated by seismic P-waves incident on a fracture intersecting the borehole, a process observed in vertical seismic profiling (VSP). The behavior is explained by fluid exchange between the fracture and borehole, and the observed efficiency of conversion is theoretically related to fracture permeability. Additionally, fracture orientation may be obtained from multiple-source-offset VSP surveys. Conventional temperature, caliper, resistivity and televiewer logs show the presence of fractures and their orientation, and provide indirect evidence of associated flow. Open fractures are simultaneously sampled over the full borehole depth by hydrophone VSP methods. The tube wave generation model produces results which compare favorably to independent estimates of fracture parameters. National Science Foundation (U.S.) (Grant EAR-8311286) 2012-11-27T20:38:48Z 2012-11-27T20:38:48Z 1985 Technical Report http://hdl.handle.net/1721.1/75067 Earth Resources Laboratory Industry Consortia Annual Report; application/pdf Massachusetts Institute of Technology. Earth Resources Laboratory |
| spellingShingle | Hardin, Ernest Toksoz, M. Nafi Detection and Characterization of Fractures from Generation of Tube Waves |
| title | Detection and Characterization of Fractures from Generation of Tube Waves |
| title_full | Detection and Characterization of Fractures from Generation of Tube Waves |
| title_fullStr | Detection and Characterization of Fractures from Generation of Tube Waves |
| title_full_unstemmed | Detection and Characterization of Fractures from Generation of Tube Waves |
| title_short | Detection and Characterization of Fractures from Generation of Tube Waves |
| title_sort | detection and characterization of fractures from generation of tube waves |
| url | http://hdl.handle.net/1721.1/75067 |
| work_keys_str_mv | AT hardinernest detectionandcharacterizationoffracturesfromgenerationoftubewaves AT toksozmnafi detectionandcharacterizationoffracturesfromgenerationoftubewaves |