Post-stack seismic Inversion, developed in the 1970s, reverses the forward modeling procedure, allowing us to derive the impedance from the reflectivity: The zero offset, or stacked, seismic trace can be modeled as the convolution of the acoustic impedance (AI) reflectivity with the wavelet.Īs shown in the next slide, this is the basis for post-stack inversion. Integrate using multivariate or Bayesian statistics In this talk I will discuss these methods and look at their assumptions and limitations. Pre-stack inversion has many forms, where the major division is between deterministic and stochastic, or geostatistical, methods. Newer methods analyze pre-stack data, where the analysis of the amplitudes without inversion is called Amplitude versus Offset, or AVO. We classify these methods into two categories: methods that analyze only the amplitudes, and methods that invert the amplitudes to reservoir properties. The mathematics behind this observation was developed in the early 1900s, but its application to exploration seismic data did not start until the 1970s. Seismic reservoir analysis techniques utilize the fact that seismic amplitudes contain information about the geological properties of the reservoir. Stochastic vs Deterministic Pre-stack Inversion Methods Brian Russell
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