Équipement et logiciel pour des études géophysiques: conception, fabrication, soutien, fourniture

Publications

The use of quasiorthogonal sweeps for simultaneous sourcing in vibroseis survey
The use of quasiorthogonal sweeps for simultaneous sourcing in vibroseis survey
Simultaneous acquisition techniques allow obtaining greater volumes of data and sophisticate its recording geometry through the use of several sources. Depending on the method of seismic (vibrational or pulse), different methods of signals separation are used. In this study, we demonstrate some methods of constructing uncorrelated signals for vibroseis simultaneous acquisition, their application on the example of synthetic data and the removal of the cross-correlation noise on the synthetic seismogram with use of hyperbolic median filtering.
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Projections Analysis of surface waves (PASW) – Description of the method and case studies
Projections Analysis of surface waves (PASW) – Description of the method and case studies
This study is intended to describe the PASW method and the results of its application. This technique is based on both the analysis of the dispersion and frequency dependence of the Rayleigh wave ellipticity. Unlike for SASW / MASW (Spectral / Multichannel Analysis of Surface Waves), during carrying out the PASW method there is no need for a priori information on the pressure wave velocity (or, in other words, on the Poisson's ratio) of the underlying layers. Thus, this technology allows one to reconstruct the velocity profiles of two body waves.
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