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![]() | 2-D Seismic Data Processing Exercise | ![]() |
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The next step is to apply NMO-based velocity analysis to the Nankai dataset (Keys and Foster, 1998).
scons cmps.viewto display the input data (Figure 4.)
Hint: read the documentation for sfpow by running
sfpowwithout arguments or by checking the ``program of the month'' blog post
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cmps
Figure 4. Nankai dataset after preprocessing and sorting into CMP gathers. |
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scons cmp1.viewto display the selected gather (Figure 5.)
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cmp1
Figure 5. CMP gather selected for velocity analysis. |
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Run
scons vscan.view scons nmo.viewto observe the result of velocity analysis on the selected CMP gather using automatic picking (Figure 6.)
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vscan,nmo1
Figure 6. NMO velocity analysis with automatic picking applied to the selected CMP gather. |
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Run
scons picks.viewto run the semblance analysis with automatic picking on every CMP gather. The result is shown in Figure 7.
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picks
Figure 7. NMO stacking velocity picked automatically from the entire line. |
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Run
scons nmos.view scons stack.viewto display the result (Figures 8 and 9.)
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nmos
Figure 8. Nankai dataset after normal-moveout correction. |
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stack
Figure 9. NMO stack of the Nankai dataset. |
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![]() | 2-D Seismic Data Processing Exercise | ![]() |
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