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SISMOGRAMMES SYNTHETIQUES; POSSIBILITES, TECHNIQUES DE REALISATION ET LIMITATIONS*.
- Source: Geophysical Prospecting, Volume 8, Issue 2, Apr 1960, p. 260 - 314
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- 27 Apr 2006
Abstract
1°– Synthetic seismograms have been computed with and without multiples by exact and by approximate methods. By means of these seismograms, some studies have been made on the various multiple reflections, the character of the films, the effect of the surface in the formation of multiples, as well as on the shape of the pulse and the spectra of seismograms. Refraction synthetic seismograms have also been realized on schematic examples with fault and pinch‐out.
2°– Various techniques for synthesizing seismograms are described which make use of analogue computing equipment such as a bar with variable diameter, or of digital computers. The orders of magnitude of the prices of these various methods are shown.
3°– Some of the limitations are described which are imposed on synthetic seismograms by the hypotheses and the inaccuracies of our knowledge of the conditions which prevail underground.