Материалы за 06.06.2014

$GeoStru EasyRefract v2014.11.1.48$

EasyRefract is the new software from GeoStru dedicated to the interpretation of seismic refraction surveys using the reciprocal method and the generalized reciprocal method (G.R.M.). The definition of the array geometry is extremely flexible and does not impose constraints on the number of shots to be used in the analysis. The software is able to guide the user through the analysis phases offering the full control of the operative process. The program has implemented an efficient locating system that allows editing the aerial photo of the research area. Field data is extracted directly from the files generated by loggers (in formats like SEG2, SEGY, SU, etc.) and plotted to give the user the identification of the first arrivals, that can also be entered manually or by copy/paste. As a function of the identification of the first arrivals, the software is able to operate the regression analysis and identify the time travel curve. Through this analysis phase arrival times are assigned to the correct refractors. After building the time travel curve and having identified the propagation velocity of the seismic signal in the different layers of the soil, the Generalized Reciprocal Method is applied. This method is based on the research, in the time-distance diagram, of an optimal distance between geophones XY, in such way that the seismic rays coming from opposing shot points, positioned in a symmetrical manner at the ends of the array, arrive from the same point of the refractor on the geophones placed in X and Y. In addition to performing an automatic search of the optimal XY, EasyRefract provides, for the eligible values XY, the diagram of velocity function with the standard deviation for each associated regression and the diagram of the time-depth function with the roughness value.