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

32Figure 27. Three-dimensional surface picked from the lines S312, S432, S28, S29, S30,S31 and S43.The time picked surfaces, recognised from several parallel and crossing lines, werecorrected for offset and offline reflection geometry. The original picks are displayed onthe sections with their apparent dips (see APPENDIX 1). The observations aregeometrically tilted so, that the shortest distance from CDP is measured along thenormal of the reflection plane (reflector is tilted towards the up-dip direction). Thiscorresponds roughly a 3D migration, but is a simplified procedure (Prissang et al.2004). Table 4 shows the information on the corrected surfaces. Surfaces are displayedin Figure 28.In Figure 44 in APPENDIX 1 is shown an interesting breakout and discontinuity of areflecting surfaces ref 9 and ref 10, indicating possible vertical displacement along asubvertical fault. The apparent diffracted velocities near the event match to Stoneleyarrivals.