Changes

==AVO modeling==

==AVO modeling==

By using seismic data and available well logs, an understanding of the origin and nature of AVO phenomena can be realized by detailed modeling. A time match between seismic and well data can be found, along with the seismic wavelet for modeling. Then, using estimates of Poisson's ratio (empirically derived), elastic model inversions are performed to estimate a more precise Poisson's ratio.

By using [[seismic data]] and available [[Basic open hole tools|well logs]], an understanding of the origin and nature of AVO phenomena can be realized by detailed modeling. A time match between seismic and well data can be found, along with the [[seismic wavelet]] for modeling. Then, using estimates of [[Poisson's ratio]] (empirically derived), elastic model inversions are performed to estimate a more precise Poisson's ratio.

The result of this approach applied to a gas sand problem is displayed in [[:file:amplitude-versus-offset-avo-analysis_fig5.png|Figure 5]]. The AVO anomaly at 460 msec is the resultant response to this gas sand. An alternative display of calibrated CDP gathers and matched AVO model for the same gas sand problem is shown in the variable area plot in [[:file:amplitude-versus-offset-avo-analysis_fig6.png|Figure 6]].

The result of this approach applied to a gas sand problem is displayed in [[:file:amplitude-versus-offset-avo-analysis_fig5.png|Figure 5]]. The AVO anomaly at 460 msec is the resultant response to this gas sand. An alternative display of calibrated [[CDP gathers]] and matched AVO model for the same gas sand problem is shown in the variable area plot in [[:file:amplitude-versus-offset-avo-analysis_fig6.png|Figure 6]].

==AVO inversion==

==AVO inversion==