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![]() | Velocity analysis using ![]() | ![]() |
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If one interprets the conventional semblance as a correlation with a
constant, the
semblance is a correlation with an amplitude
trend. I have derived an explicit expression for the
semblance
and analyzed it to quantify the observable loss of resolution. I have
demonstrated the advantages of the
semblance attribute using
synthetic and field data examples. The ratio of the
and
conventional semblances serves as a useful AVO indicator
attribute. The sensitivity of this attribute to non-linear
variations in the amplitude trend can be a subject of further
research. Further applications may also include velocity
analysis of converted waves and seismic diffractions.