Anisotropic frequency-dependent characteristics of PP- and PS-waves in partially saturated double-porosity rocks

Abstract Most frequency-dependent AVO inversions are currently based on an approximate equation derived using isotropic medium. However, actual reservoirs usually show anisotropy, such as shale reservoirs, tight sandstone and fractured reservoirs. We propose a joint (JFAVO) inversion in anisotropic medium periodic layered double-porosity This JFAVO will allow us to quantitatively study the influence of fluids dispersion PP- PS-wave velocities parameters. First, we used analyse characteristics anisotropy found that parameters obvious dispersions, similar those velocities. Then, Rüger's extract Finally, analysed stability applicability algorithm, three sets models sensitivity properties fluids. The numerical analysis results PP-wave velocity parameter δ sensitive fluids, whereas, is not. When saturation exceeds 80%, not