Overburden Imaging in the Barents Sea
Our second example comes from the Barents Sea, in water depths of 250 to 300 m. Here imaging of the complex overburden is significantly improved using SWIM.
The SWIM data was processed at 6.25 m x 6.25 m sampling, and up to 240 Hz. Not only did the imaging use high-resolution FWI velocities, SWIM also facilitated their effective QC during the model building phase, by defining the near-surface reflectivity that could be used to gauge the FWI model conformity with shallow data.
In the SWIM images, the orange arrows indicate locations where no amplitude anomalies are shown in the conventional processing. However, the SWIM images show isolated anomalies that need further assessment.