Modeling Borehole Stoneley Wave Propagation Across Permeable In-Situ Fractures
The characterization of hydraulic transmissivity of permeable fracture reservoirs is a very important task in the exploration of water resources and hydrocarbons. Previous studies that model the permeable structure as a single fluid-filled fracture failed to explain the observed significant Stone...
| Main Authors: | , , |
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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/1721.1/75170 |
| _version_ | 1826188363407818752 |
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| author | Tang, X. M. Cheng, C. H. Paillet, F. L. |
| author2 | Massachusetts Institute of Technology. Earth Resources Laboratory |
| author_facet | Massachusetts Institute of Technology. Earth Resources Laboratory Tang, X. M. Cheng, C. H. Paillet, F. L. |
| author_sort | Tang, X. M. |
| collection | MIT |
| description | The characterization of hydraulic transmissivity of permeable fracture reservoirs is a
very important task in the exploration of water resources and hydrocarbons. Previous
studies that model the permeable structure as a single fluid-filled fracture failed to
explain the observed significant Stoneley wave attenuation across the permeable structure.
In this paper, the structure is modeled as a permeable fracture zone and synthetic
Stoneley wave seismograms in the vicinity of the structure are calculated. The results
show that Stoneley waves can be strongly attenuated or even eliminated without significant
reflection, because of the dissipation of wave energy into the permeable zone.
Several field cases are also modeled and the theoretical results are compared with the
field data. It is shown that low- and medium-frequency Stoneley waves (1 kHz data from
Moodus, Conneticut, and 5 kHz data from Monitoba, Canada) are very sensitive to the
permeability of the fractures and can be used to assess permeability from in-situ logging
data, if the fracture porosity and zone thickness can be measured. At high frequencies,
however, Stoneley waves are not very sensitive to permeability but are mainly affected
by the sum of the fracture openings expressed as the product of fracture zone thickness
and porosity in the fracture zone. This finding is demonstrated by a logging data set
(Monitoba, Canada) obtained using high-frequency Stoneley waves at 34 kHz. |
| first_indexed | 2024-09-23T07:58:30Z |
| format | Technical Report |
| id | mit-1721.1/75170 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T07:58:30Z |
| publishDate | 2012 |
| publisher | Massachusetts Institute of Technology. Earth Resources Laboratory |
| record_format | dspace |
| spelling | mit-1721.1/751702019-04-09T15:51:38Z Modeling Borehole Stoneley Wave Propagation Across Permeable In-Situ Fractures Tang, X. M. Cheng, C. H. Paillet, F. L. Massachusetts Institute of Technology. Earth Resources Laboratory Cheng, C. H. Paillet, F. L. The characterization of hydraulic transmissivity of permeable fracture reservoirs is a very important task in the exploration of water resources and hydrocarbons. Previous studies that model the permeable structure as a single fluid-filled fracture failed to explain the observed significant Stoneley wave attenuation across the permeable structure. In this paper, the structure is modeled as a permeable fracture zone and synthetic Stoneley wave seismograms in the vicinity of the structure are calculated. The results show that Stoneley waves can be strongly attenuated or even eliminated without significant reflection, because of the dissipation of wave energy into the permeable zone. Several field cases are also modeled and the theoretical results are compared with the field data. It is shown that low- and medium-frequency Stoneley waves (1 kHz data from Moodus, Conneticut, and 5 kHz data from Monitoba, Canada) are very sensitive to the permeability of the fractures and can be used to assess permeability from in-situ logging data, if the fracture porosity and zone thickness can be measured. At high frequencies, however, Stoneley waves are not very sensitive to permeability but are mainly affected by the sum of the fracture openings expressed as the product of fracture zone thickness and porosity in the fracture zone. This finding is demonstrated by a logging data set (Monitoba, Canada) obtained using high-frequency Stoneley waves at 34 kHz. United States. Dept. of Energy (Grant DE-FG0286ER13636) Massachusetts Institute of Technology. Full Waveform Acoustic Logging Consortium 2012-12-03T20:20:12Z 2012-12-03T20:20:12Z 1991 Technical Report http://hdl.handle.net/1721.1/75170 Earth Resources Laboratory Industry Consortia Annual Report;1991-03 application/pdf Massachusetts Institute of Technology. Earth Resources Laboratory |
| spellingShingle | Tang, X. M. Cheng, C. H. Paillet, F. L. Modeling Borehole Stoneley Wave Propagation Across Permeable In-Situ Fractures |
| title | Modeling Borehole Stoneley Wave Propagation Across Permeable In-Situ Fractures |
| title_full | Modeling Borehole Stoneley Wave Propagation Across Permeable In-Situ Fractures |
| title_fullStr | Modeling Borehole Stoneley Wave Propagation Across Permeable In-Situ Fractures |
| title_full_unstemmed | Modeling Borehole Stoneley Wave Propagation Across Permeable In-Situ Fractures |
| title_short | Modeling Borehole Stoneley Wave Propagation Across Permeable In-Situ Fractures |
| title_sort | modeling borehole stoneley wave propagation across permeable in situ fractures |
| url | http://hdl.handle.net/1721.1/75170 |
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