AVO Analysis: Rock-physics Basis
Chapter 4, “AVO Analysis: Rock-physics Basis,” is the core of the book. This chapter integrates seismic petrophysics with seismic amplitude analysis — notably, with amplitude variation with offset (AVO) or angle of incidence (AVA). The AVO classification scheme and interpretation methodology offered here differ from the classic scheme of intercept/gradient analysis and invoke acoustic- and shear-impedance templates instead of intercept/gradient crossplots. That allows a user to streamline AVO behavior predictions during seismic petrophysics analysis of the log data early in the workflow. It also provides a robust quality assurance during synthetic forward modeling. In turn, that modeling can be used in seismic processing and gather conditioning for prestack attribute computation and simultaneous impedance inversion of seismic data.
Figures & Tables
Seismic Petrophysics in Quantitative Interpretation is written for oil and gas industry professionals and academicians who are concerned with the use of seismic data in petroleum exploration and production. In addition, it should prove useful toward thoughtful applications of those data by geotechnical engineers. Seismic interpretation can be made simple and robust by integrating rock-physics principles with the seismic and petrophysical attributes that bear on the properties of conventional reservoirs (thickness, net/gross, lithology, porosity, permeability, and satu-ration) and of unconventional reservoirs (thickness, lithology, organic richness, and thermal maturity). Practical solutions can be used to address existing interpretation problems in rock-physics-based AVO analysis and prestack seismic inversion in order to streamline the workflows in subsurface characterization.