Affiliation:
1. University of Oklahoma, School of Geology and Geophysics, Norman, Oklahoma 73019‐0628
2. Oklahoma Geological Survey, Energy Center, 100 E. Boyd Street, Norman, Oklahoma 73019‐0628
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.
Publisher
Society of Exploration Geophysicists
Subject
Geochemistry and Petrology,Geophysics
Reference11 articles.
1. Aki, K., and Richards, P. G., 1980, Quantitative seismology: Theory and methods, vol. 1: W. H. Freeman & Co.
2. An effective anisotropy parameter in transversely isotropic media
3. Castagna, J. P., 1993, AVO analysis: Tutorial and review, in Backus, M. M., Ed., Offset‐dependent reflectivity—Theory and practice of AVO analysis: Soc. Expl. Geophys., 3–36.
4. Relationships between compressional‐wave and shear‐wave velocities in clastic silicate rocks
5. Framework for AVO gradient and intercept interpretation
Cited by
21 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献