Reconstruction of the Layer Anisotropic Elastic Parameters and High-resolution Fracture Characterization from P-wave

In this paper we show how layered based high resolution estimates of component of the subsurface anisotropic elastic tensor can be reconstructed by using wide azimuth P wave data. We combine the kinematic information derived from anisotropic velocity analysis together with dynamic information derived from AVAZ analysis of wide azimuth seismic data and derive interval P-impedance (Ip), S-impedance (Is), and anisotropic parameters associated with anisotropic fracture media. These parameters can be used to infer fractured rock properties using stochastic rock physics inversion. We characterize a fractured reservoir by quantitative interpretation of seismic interval (or layer) properties. We use three seismic inversion attributes – P-impedance (IP), S-impedance (IS), and an anisotropy attribute (a linear function the anisotropic parameters in the subsurface), obtained by integrating data from kinematics (traveltimes) and dynamics (reflectivities) Ultimately, we use rock physics model-based Bayesian inversion to derive porosity and crack density estimates along with their associated uncertainties.