| Abstract: | A theoretical comparison is made of PP and PS angle-dependent reflection coefficients at the top of two fractured-reservoir models using exact, general, anisotropic reflection coefficients. The two vertical-fracture models are taken to have the same total crack density. The primary issue investigated is determination of the fracture orientation using azimuthal AVO analysis. The first model represents a single-fracture set and the second model has an additional fracture set oblique to the first set at an angle of 60??. As expected, the PP-wave anisotropy is reduced when multiple fracture sets are present, making the determination of orientation more difficult than for the case of a single-fracture set. Long offsets are required for identification of dominant fracture orientations using PP-wave AVO. PS-wave AVO, however, is quite sensitive to fracture orientations, even at short offsets. For multiple-fracture sets, PS signals can potentially be used to determine orientations of the individual sets. ?? 2005 Society of Exploration Geophysicists. All rights reserved. |
| Genre: | Article |
| ProdID: | 70029329 |
| Citation Author: | Chen, H.; Brown, R. L.; Castagna, J. P. |
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| Citation Issue: | 2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Geophysics |
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| Citation Search Results Text: | AVO for one- and two-fracture set models; 2005; Article; Journal; Geophysics; Chen, H.; Brown, R. L.; Castagna, J. P. |
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| Citation Volume: | 70 |
| Citation Year: | 2005 |
| Type: | citation/reference |
| Text: | AVO for one- and two-fracture set models; 2005; Article; Journal; Geophysics; Chen, H.; Brown, R. L.; Castagna, J. P. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1190/1.1884825 |
| Date Other: | Sat, 1 Jan 2005 00:00 -0600 |
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