Paper Summary
Dual sensor streamer acquisition allows the data to be accurately separated into upgoing and downgoing wavefields. The two components are used as input to migration that employs primaries and multiples for separated wavefield imaging (SWIM). SWIM turns each receiver into a virtual source, therefore effectively increases the surface coverage and subsurface illumination. This principle is independent of the propagation algorithm, which can be based on one-way or two-way solutions to the wave equation. We find that SWIM based on reverse time migration (RTM) better handles the steep dips of the data. On the other hand, SWIM using one-way wave equation migration (WEM) provides an efficient alternative for high-resolution high-frequency imaging.