Common Converting Elements (Cce) Ray Tracing For The Calculation Of Traveltimes For Reflected Converted Waves

In the present paper are carried out numerical calculations of a new approximation to obtain the traveltime for P-SV <br>reflected converted waves. A set of sources emit P-waves and they travel to a given interface. These waves are converted<br>in S-waves after the reflection and they are recorded at the corresponding receivers as P-SV converted waves. Common<br>converting elements (CCE) have been simulated by fans of rays emmitted upward by ctitious sources (elements)<br>located on the reflecting interface. The sources emit P-and S-waves upward. The corresponding true traveltimes are<br>calculated for the pairs of rays within the fans. The true-and approximated traveltimes are compared and one can see<br>a fairly good approximation of the new formula for the traveltime of P-SV reflected converted waves, for small o sets.<br>This means that the new formulas can be used for stacking of P-SV reflection data. The accuracy of the new formulas<br>is investigated for two models.