Translations:Seismic deconvolution/5/en

Many great oil fields discovered in the early days of seismic prospecting were in areas that produced textbook-type seismograms. Such seismograms showed beautiful primary reflections that accurately represented the sedimentary structure, because in those areas, the sedimentary layers were characterized by interfaces with small and uncorrelated reflection coefficients (i.e., interfaces without major reflectivity magnitudes). In other words, such favorable seismic areas contained no major interfaces that would give rise to strong multiple reflections in the depth range of interest. Because of the smallness and randomness of the reflectivity in these sedimentary columns, the multiples tended to interact destructively with each other, with the net effect that no strong multiples tended to appear.