Interpretation of shear wave birefringence in P to S converted waves data using the propagator matrix method
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, February 1999.
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | eng |
| Published: |
Massachusetts Institute of Technology
2010
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/1721.1/58164 |
| _version_ | 1826212960598491136 |
|---|---|
| author | Sierra T., Jesús V. (Jésus Vicente), 1965- |
| author2 | M. Nafi Toksöz. |
| author_facet | M. Nafi Toksöz. Sierra T., Jesús V. (Jésus Vicente), 1965- |
| author_sort | Sierra T., Jesús V. (Jésus Vicente), 1965- |
| collection | MIT |
| description | Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, February 1999. |
| first_indexed | 2024-09-23T15:40:53Z |
| format | Thesis |
| id | mit-1721.1/58164 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T15:40:53Z |
| publishDate | 2010 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/581642020-05-08T16:34:16Z Interpretation of shear wave birefringence in P to S converted waves data using the propagator matrix method Sierra T., Jesús V. (Jésus Vicente), 1965- M. Nafi Toksöz. Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Earth, Atmospheric, and Planetary Sciences Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, February 1999. Includes bibliographical references (leaves 116-119). We present an original method for estimating local shear wave birefringence properties for 3D surface P to S converted waves. To accomplish this we approach the problem using reverse VSP (RVSP). The method works in the pre-stack domain and uses the P waves converted to S as shear wave sources. We solve the transmission problem using the propagator matrix method. The importance of this method is that it does not require information about layering above the zone of interest and is accurate for estimating the anisotropy parameters. The method involves solving a non-linear problem in the frequency domain where Simulated Annealing is used as the global minimization technique. The procedure allows estimation of the propagator matrix related to the target zone, assuming plane wave propagation allows its diagonalization by pure rotations. This matrix diagonalization ends up with an estimation of the natural eigen directions of the medium when the range of offset angles does not exceed 35*. The proposed method is validated with synthetic RVSP data for two models with different densities of vertical fractures. Results show good accuracy in the estimation of the angle of the fractures for the whole range of offsets. The study also extends to show the dependence on the frequency and on the offset. by Jesús V. Sierra T. S.M. 2010-09-02T14:48:26Z 2010-09-02T14:48:26Z 1998 1999 Thesis http://hdl.handle.net/1721.1/58164 42731648 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 119 leaves application/pdf Massachusetts Institute of Technology |
| spellingShingle | Earth, Atmospheric, and Planetary Sciences Sierra T., Jesús V. (Jésus Vicente), 1965- Interpretation of shear wave birefringence in P to S converted waves data using the propagator matrix method |
| title | Interpretation of shear wave birefringence in P to S converted waves data using the propagator matrix method |
| title_full | Interpretation of shear wave birefringence in P to S converted waves data using the propagator matrix method |
| title_fullStr | Interpretation of shear wave birefringence in P to S converted waves data using the propagator matrix method |
| title_full_unstemmed | Interpretation of shear wave birefringence in P to S converted waves data using the propagator matrix method |
| title_short | Interpretation of shear wave birefringence in P to S converted waves data using the propagator matrix method |
| title_sort | interpretation of shear wave birefringence in p to s converted waves data using the propagator matrix method |
| topic | Earth, Atmospheric, and Planetary Sciences |
| url | http://hdl.handle.net/1721.1/58164 |
| work_keys_str_mv | AT sierratjesusvjesusvicente1965 interpretationofshearwavebirefringenceinptosconvertedwavesdatausingthepropagatormatrixmethod |