Intelligent Resources Information

Our Rayfract® refraction tomography software allows reliable imaging of subsurface velocity structure including faults , strong lateral velocity variation and other velocity anomalies . Our Smooth inversion tomographic method is based on physically realistic modeling of first break propagation for P-wave and S-wave surveys. We forward model refraction, transmission and diffraction (Lecomte, 2000) and back-project traveltime residuals along wave paths also known as Fresnel volumes (Watanabe, 1999) instead of conventional rays. This increases the numerical robustness of the inversion. A smooth minimum-structure and artefact-free 1D starting model is determined automatically directly from the seismic traveltime data by horizontally averaging DeltatV (Wiechert-Herglotz) method 1D velocity-depth profiles along the seismic line. The starting model is then refined with 2D WET Wavepath Eikonal Traveltime inversion (Schuster, 1993) . No need to map traveltimes to refractors.