I generated two synthetic data sets assuming an earth model that includes two flat layers with constant elastic properties on each layer. In model 1, I chose the same elastic properties for both the overlaying and the underlying layer, which results in no AVA effect along the interface. In model 2, I chose rock properties corresponding to velocity and density contrast in the underlying layer which leads to an AVA effect of decreasing amplitudes with increasing angle on incidence. Figure 1 shows the expected P-wave reflection coefficient corresponding to model 1 and model 2, calculated using Zoeppritz equations.
The modeling was done using a ray tracing approach to get the timing of the event and using the exact Zoeppritz equations to set the amplitude values. Figure 2 shows the picked amplitudes for the resulting modeled data.