| Popis: |
Broadband data allows for high-frequencies to be recovered but due to operational and efficiency reasons the cross-line bin size leaves much of these data aliased. These aliased data, either noise or the desired signal, are filtered during processing and imaging leaving either artefacts in the case of noise or incomplete migration in the case of signal. An efficient method of acquiring dense cross-line bin sizes is proposed which relies on multiple blended sources; variable streamer separations in combination with fanmode shooting; and real-world spread movements to achieve a randomized midpoint distribution to fully sample the wavefield, within the kinematic constraints of narrowazimuth spatial sampling. |
