ReflexW covers the complete range of data processing for ultrasound, seismic and GPR data. It allows the handling of different source and sensor geometries for surface reflection and refraction, downhole and borehole tomography as well as combinations of borehole and surface measurements for near surface applications.
Different modules can be chosen depending on specific requests:
2D-data analysis: Picking the first arrivals using different methods (manual, semiautomatic, automatic picking)
CMP reflection processing
The software is used to process seismic crosshole testing data obtained after ASTM4428 and to output results. Seismic data can be sorted and edited and traveltimes can be determined. It is possible to implement the deviation of the boreholes. Different automatic or manual methods are available to pick the first arrivals. If a shear wave source with two different orientations has been used the data with different polarization can be overlaid for a more accurate S-wave picking.
Interpretation of crosshole seismic data using two different S-wave polarizations
3D-view of boreholes allows a visualization of shots and receivers
GeoTomCG is a 2D/3D tomographic inversion program for traveltime and amplitude data sets. Source-to-receiver traveltimes can be analyzed to calculate velocities or attenuation coefficients. It is also possible to specify anisotropy for each point of the grid. Raypaths can be straight or curved. Versatile constraints allow site information to influence the inversion and provide more reliable results.
GeoTomCG provides graphical displays of velocities, raypath densities and other parameters such as data quality and residual error to support the reliability of the results. The output are 3D numerical results and 2D slices of the 3D grid as ASCII files that can be read by commercial 3D and 2D visualization software.
Setting of inversion parameters
Displayed 2D model of seismic velocities after inversion
The seismic refraction tomography software allows reliable imaging of subsurface velocity structure including faults, strong lateral velocity variation and other velocity anomalies.
The smooth inversion tomographic method is based on physically meaningful modelling of seismic first break energy refraction, transmission and diffraction. A smooth initial 1D gradient model is determined automatically directly from the traveltime data. The initial model is then refined with true 2D WET Wavepath Eikonal Traveltime tomography, no need to map traveltimes to refractors. To display data SURFER software is required.