Saturday, August 1, 2015

Offset Range in Seismic Acquisition

The offset range is one of the most important attributes. Without an adequate offset range in the bin, the bin is useless for velocity analysis and probably will be a poor stack trace. Near traces represent the best approximation to the zero offset for depth conversion. The middle traces connect the near and far traces for defining the move out hyperbola. In some case, the middle traces contain the best image of the target. The far traces are absolutely essential. Without the far traces there is not enough moveout on the traces to determine the velocity. Other techniques, such as AVO, cannot be applied without the far traces.

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