S-DAS on the Seabed from a Conventional Surface Seismic Processing Perspective

Distributed Acoustic Sensing (DAS) is becoming a valuable measurement technique for geophysical applications. In 2022, a 2D line was acquired using conventional towed-streamer (TS) configuration that closely followed a fibreoptics communication cable to the Ula field production platform. The main objective of the survey was to demonstrate, through a case study, the potential of using very old 1990s communication cables deployed on the seabed for surface seismic imaging. This enabled us to jointly analyse seabed DAS (SDAS) and conventional TS data from acquisition, through the different processing stages up to a migrated image. We show in this case-study that S-DAS enabled us to generate P-wave and converted wave (PS) images of the subsurface, which are comparable to conventional surface seismic images. In this abstract, we focus on data processing challenges associated with controlled source processing of seabed cables and demonstrate some of the similarities and differences between S-DAS and conventional surface seismic data processing.