Three-parameter AVO crossplotting in anisotropic media
Geophysics
By: Chen Hao, J.P. Castagna, R.L. Brown, and A.C.B. Ramos
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Abstract
Amplitude versus offset (AVO) interpretation can be facilitated by crossplotting AVO intercept (A), gradient (B), and curvature (C) terms. However, anisotropy, which exists in the real world, usually complicates AVO analysis. Recognizing anisotropic behavior on AVO crossplots can help avoid AVO interpretation errors.
Using a modification to a three-term (A, B, and C) approximation to the exact anisotropic reflection coefficients for transversely isotropic media, we find that anisotropy has a nonlinear effect on an A versus C crossplot yet causes slope changes and differing intercepts on A versus B or C crossplots. Empirical corrections that result in more accurate crossplot interpretation are introduced for specific circumstances.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Three-parameter AVO crossplotting in anisotropic media |
| Series title | Geophysics |
| DOI | 10.1190/1.1487081 |
| Volume | 66 |
| Issue | 5 |
| Year Published | 2001 |
| Language | English |
| Publisher | Society of Exploration Geophysicists |
| Description | 5 p. |
| First page | 1359 |
| Last page | 1363 |
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