Orientation Estimation for Multiple Large Fractures by Scattering Energy
We have done the numerical modeling of seismic response to multiple sets of vertical large fractures by using finite-difference method (FD), which can easily handle media with monoclinic anisotropy. We consider three types of fracture distributions: a set of parallel fractures, two sets of orthogona...
| 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/1721.1/67916 |
| _version_ | 1826198231608983552 |
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| author | Zhang, Yang Chi, Shihong Willis, Mark E. Toksoz, M. Nafi Burns, Daniel R. |
| author2 | Massachusetts Institute of Technology. Earth Resources Laboratory |
| author_facet | Massachusetts Institute of Technology. Earth Resources Laboratory Zhang, Yang Chi, Shihong Willis, Mark E. Toksoz, M. Nafi Burns, Daniel R. |
| author_sort | Zhang, Yang |
| collection | MIT |
| description | We have done the numerical modeling of seismic response to multiple sets of vertical large fractures by using finite-difference method (FD), which can easily handle media with monoclinic anisotropy. We consider three types of fracture distributions: a set of parallel fractures, two sets of orthogonal fractures and two sets of non-orthogonal fractures intersecting at 45 degrees. We address the seismic scattering response to large fractures by using a 3-layer model and a 5-layer model, where a fractured reservoir is in the middle layer of these two models. Seismic scattered energy is analyzed by the Scattering Index (SI) method to estimate the orientation of these multiple fractures. In both models, SI indicates the correct orientation of the two orthogonal fracture sets but is ambiguous for non-orthogonal fracture sets. Information about the fracture spacing and compliance can also be extracted from the azimuthal SI in some situations. More compliant fracture sets result in higher SI values while the relationship between fracture spacing and SI depends on the source wavelength. Variations in the SI energy can be caused by fracture spacing and compliance variations, and these relationships need further investigation. |
| first_indexed | 2024-09-23T11:01:28Z |
| format | Technical Report |
| id | mit-1721.1/67916 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T11:01:28Z |
| publishDate | 2012 |
| publisher | Massachusetts Institute of Technology. Earth Resources Laboratory |
| record_format | dspace |
| spelling | mit-1721.1/679162019-04-10T09:59:44Z Orientation Estimation for Multiple Large Fractures by Scattering Energy Zhang, Yang Chi, Shihong Willis, Mark E. Toksoz, M. Nafi Burns, Daniel R. Massachusetts Institute of Technology. Earth Resources Laboratory Zhang, Yang Chi, Shihong Willis, Mark E. Toksoz, M. Nafi Burns, Daniel R. We have done the numerical modeling of seismic response to multiple sets of vertical large fractures by using finite-difference method (FD), which can easily handle media with monoclinic anisotropy. We consider three types of fracture distributions: a set of parallel fractures, two sets of orthogonal fractures and two sets of non-orthogonal fractures intersecting at 45 degrees. We address the seismic scattering response to large fractures by using a 3-layer model and a 5-layer model, where a fractured reservoir is in the middle layer of these two models. Seismic scattered energy is analyzed by the Scattering Index (SI) method to estimate the orientation of these multiple fractures. In both models, SI indicates the correct orientation of the two orthogonal fracture sets but is ambiguous for non-orthogonal fracture sets. Information about the fracture spacing and compliance can also be extracted from the azimuthal SI in some situations. More compliant fracture sets result in higher SI values while the relationship between fracture spacing and SI depends on the source wavelength. Variations in the SI energy can be caused by fracture spacing and compliance variations, and these relationships need further investigation. United States. Dept. of Energy (Award No. DE-FC26-02NT15346) Massachusetts Institute of Technology. Earth Resources Laboratory 2012-01-05T19:20:42Z 2012-01-05T19:20:42Z 2006 Technical Report http://hdl.handle.net/1721.1/67916 Earth Resources Laboratory Industry Consortia Annual Report;2006-04 application/pdf Massachusetts Institute of Technology. Earth Resources Laboratory |
| spellingShingle | Zhang, Yang Chi, Shihong Willis, Mark E. Toksoz, M. Nafi Burns, Daniel R. Orientation Estimation for Multiple Large Fractures by Scattering Energy |
| title | Orientation Estimation for Multiple Large Fractures by Scattering Energy |
| title_full | Orientation Estimation for Multiple Large Fractures by Scattering Energy |
| title_fullStr | Orientation Estimation for Multiple Large Fractures by Scattering Energy |
| title_full_unstemmed | Orientation Estimation for Multiple Large Fractures by Scattering Energy |
| title_short | Orientation Estimation for Multiple Large Fractures by Scattering Energy |
| title_sort | orientation estimation for multiple large fractures by scattering energy |
| url | http://hdl.handle.net/1721.1/67916 |
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