Imaging Processing of 3D DAS-VSP Data Jointly Acquired with a High-Density OBN Survey Offshore Abu Dhabi

Joint surface and borehole seismic are a 3D surface-and-borehole seismic exploration method of the simultaneous acquisition of onshore or offshore 3D seismic and VSP (Vertical Seismic Profile) data using the same sources. When acquiring surface 2D or 3D seismic data in the field, simultaneously acquired 2D or 3D distributed acoustic sensing VSP or DAS-VSP data can provide full well high-resolution structural images around the borehole and enhance surface 2D or 3D seismic data processing significantly. This paper describes the imaging processing of the 3D DAS-VSP data from 13 wells jointly acquired with an ongoing high density OBN data acquisition project. Apart from the conventional processing steps of 3D VSP data, the deblending processing of the multi-well blended acquired 3D DAS-VSP data using multiple airgun sources, special ringing noise removal procedure, joint domain full waveform inversion (JDFWI) for velocity model update, and one way wave equation multiple migration (OWEMM) method were used to generate final imaging. The results provided good quality imaging in a relatively large subsurface area.