Common-depth-point-stack is a seismic exploration method in which the same subsurface reflector is recorded on numerous seismic profiles from different offset distances hetween source and detector. The traces are corrected for statics and normal moveout and then superimposed or stacked. The traces are summed algebraically into a single trace. Up to 180 traces can he used. Stacking eliminates random noise and reinforces weak reflectors. The number of seismic profiles stacked is identified with a number or percentage such as 24 stack or 2,400% stack, which is called the multiplicity factor. The common-depthpoint stack often uses 12, 24, or 48 traces.

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