Abstract
Seismic attenuation and dispersion are of great interests among geophysicists because it carries important information of reservoir parameters such as porosity, saturation, viscosity and other fluid properties. The reason of velocity dispersion is more and more interpreted by the category of the wave-induce fluid flow mechanisms, among which the patchy saturation model is an important and practical theory to describe the heterogenous rocks underground. In this paper, the dispersion caused by patchy saturation was calculated by the effective Biot theory, the reflection and transmission coefficients at interfaces were obtained exactly using fluid pressure and displacement continuity conditions. Finally, the relationship between saturation and seismic wave attenuation can be observed on AVO synthetic data.
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