A synthetic interval velocity model was built and a CMP gather was modeled using a finite difference code (Figure 1)
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Figure 1 Synthetic Model. |
For this gather, a velocity analysis is performed to obtain the RMS velocity (equation 1). Figure 2 shows the rms velocity curve picked from the data, and Figure 3 shows a comparison of the interval velocity obtained by the methodology described above, the RMS velocity obtained from the velocity analysis, and the remodeled RMS velocity (= ).
This comparison shows that the remodeled RMS velocity is similar to the picked RMS velocity. This similarity prove that the method used works well.
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Figure 2 Velocity analysis for the first synthetic example. The curve corresponds to the picked RMS velocity |
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Figure 3 Comparison of interval and RMS velocities. |