Two-parameters residual-moveout analysis for wave-equation migration velocity analysis |

Figure 10 shows the zooms into the plots shown in Figure 5; that is, comparing the correlation function for the first CIG (velocity anomaly) obtained using the ``Taylor'' RMO function (Figure 10a) and the conventional one-parameter RMO function (Figure 10b). I set the width of the close up windows to be equal to the distance of the maximum from the starting CIG; that is, the difference between the minimum and the maximum value of the parameter is and the difference between the minimum and the maximum value of the parameter is . The two plots shown in Figure 10 are almost identical, indicating that in this case there would be a negligible advantage to be gained by employing a two-parameter RMO function.

Figure 11 analyze the application of the ``Orthogonal'' RMO function to the same CIG as the previous figure. It shows the zooms into the plots shown in Figure 7b and Figure 6b, respectively. I set the window width following the same criterion described above for the ``Taylor'' RMO function. In this case, the one-parameter RMO function seems to provide better local convergence than the two-parameter RMO function.

The last two figures, Figure 12 and Figure 13, show similar analysis as the previous two, but applied to the CIG that suffers from the effects of anisotropy. For these CIG the two-parameters RMO function provides a better local convergence than the one-parameter function. The improvements look more substantial for the ``Orthogonal'' RMO function than for the ``Taylor'' RMO function.

Zoom-CorrShift-TP
Zooms into the correlation functions shown in
Figure 5.
Figure 10. | |
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Zoom-CorrShift-OP-narrow
Zooms into the correlation functions shown in
Figure 7b
and
Figure 6b, respectively.
Figure 11. | |
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Zoom-CorrShift-TP-aniso
Zooms into the correlation functions shown in
Figure 8.
Figure 12. | |
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Zoom-CorrShift-OP-aniso
Zooms into the correlation functions shown in
Figure 9.
Figure 13. | |
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Two-parameters residual-moveout analysis for wave-equation migration velocity analysis |

2011-09-13