Seismic 2D Reflection Processing and Interpretation of ... - Posiva

20Figure 16. Shot gather from the line S28 after the muting and residual statics. Tracenumber on X-axis and two way travel time in seconds on Y-axis. First 4 shots.Reflections can be seen e.g. at 013 and 0.2 seconds.Normal moveout (NMO, Table 2, item 13) compensates for the effects of theseparation between seismic sources and receivers and must be performed prior tostacking. NMO velocity used was 5000 m/s and stretch mute 4. Samples with NMOstretch exceeding stretch mute were zeroed. Shot gather after the normal moveout isshown in Figure 17. In Figure 18 is shown a detailed example of the first shot fromthe line S28. Originally first breaks and reflecting events are hyperbolic but NMOstraightens them up.