Effect of migration on fault interpretation

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Problem 9.30

Interpret the faulting in Figure 9.30a to see how much improvement migration makes.

Solution

Among the evidences for faulting are interruptions in the continuity of events and offset of events; additional faulting criteria are discussed in problem 10.5. While the larger faults can be picked on the unmigrated section, their evidences are sharpened by migration and additional faults can be picked. Figure 9.30b shows a fault interpretation of Figure 9.30a(ii). Some faults appear to die out as one goes shallower in the section; some of this die-out is probably real, some may be because the fault throw becomes too small to see clearly. Evidences of faulting also often disappear as one goes deeper because of deteriorating resolving power or data quality.

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