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Near Surface Modelling in Shallow Marine Setting Using Turning Ray Tomography Approach
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 23rd European Meeting of Environmental and Engineering Geophysics, Sep 2017, Volume 2017, p.1 - 5
Abstract
for shallow water environment standard water correction workflow was used to address the static resulted from the wave traveling through water and with the assumption of homogenies layering below the water bottom. In Arabian Gulf area, two acquisition schemes were used based on water depth. OBC acquisition was done in areas where water depth is relatively shallow range between 5 to 35 meters and standard limited azimuth 3D streamer acquisition was done in deeper water. Merging the two datasets at the prestack domain create a major challenges where water correction was used to reference the two dataset to same reference datum. Based on the input received from interpretation team, an attempt to resolve near surface zone 100 meters below the water bottom was needed to improve the imaging and resolve the difference found between the prognoses and actual depth. We used turning-ray tomography to estimate the near surface velocities for static corrections followed by prestack time migration