Water bottom multiple
SequentialStratigrapy10
Water-bottom multiples are those multiples whose raypaths lie entirely within the water layer (Figure 6a). Since the sea floor usually has a higher reflectivity than.
Water-bottom multiples. Consider a model with a dipping water-bottom in 2D. The raypath of the primary reflection can be easily computed using the concept of.
Multiples from the water bottom (the interface of the base of water and the rock or sediment beneath it) and the air-water interface are common in marine seismic.
Description:This type of multiple also visible in Plate 54 is, probably, the most annoying but, fortunately, it is the easiest to eliminate. The time difference between the primary and its first multiple is, every where, equal to the time through the water layer. These methods, which include the radon transform methods rely on velocity differences between the primaries and multiples; the primaries map from offset space to the zero residual moveout in Radon space whereas multiples map to the positive residual moveout zone, allowing the multiples to be well modeled in Radon space, and attenuation can thereafter be achieved by subtraction of the modeled multiples from the data. Multiples from the water bottom the interface of the base of water and the rock or sediment beneath it , as illustrated here, and the air-water interface are common in marine seismic data, but they can be suppressed by seismic processing. In some areas, there occur anomalous up-hole times which are difficult to explain http:
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