Seismic Attribute-based Evaluation of Anisotropic Piezosensitivity Theory

摘要

Understanding the effect of stress and pore pressure on seismic velocities is important for overpressure prediction and for 4D reflection seismic interpretation. Shapiro and Kaselow (2005) developed an anisotropic piezosensitivity theory describing elastic moduli of rocks and their anisotropy as a nonlinear function of confining and pore stresses. Here, this approach is applied to the rocks being transversely isotropic (TI) in unloaded state. In the case of hydrostatic loading of the TI rock sample there are only two independent shear components of a compliance tensor related to the shear deformation. Developed theory and expression for the TI rocks was tested on the experimental data. The theory developed for seismic velocities is compared with a response of amplitude- and frequency-dependent seismic attributes derived from the experimental waveforms.