Raw Seismic Data For the explosion we just considered ... Device #1 Device #2 For the explosion we just considered ... Time 0.0 0.1 0.2 0.3 0.4 Listening device #1 records a reflection starting at 0.4 seconds Listening device #2 records a reflection starting at 0.8 seconds 0.5 0.6 0.7 0.8 SLIDE 16 This shows the raw data recorded by the two “listening” devices on the previous slide The acoustic wave is recorded at device #1 at 0.4 seconds The acoustic wave is recorded at device #2 at 0.8 seconds To image the subsurface, we use hundreds of shots (explosions) and millions of receivers (listening devices) arranged in lines either on land or offshore To Image the Subsurface, We Use Many Shots (explosions) and Many Receivers (listening devices) Arranged in Lines either on Land or Offshore Courtesy of ExxonMobil L 3 - Types of Data