The Impact Of Estimated Temporal And Spatial Variability Of Water Layer Velocity On The Correction Of OBS Data
The impact of estimated temporal and spatial variability of water layer velocity on the correction of OBS data
Year: 2023First Published: IMAGEAuthors: Peter Scholtz, Truong Nguyen, and Arash JafarGandomi
Correcting for source and receiver positioning and clock-drift errors are early steps in the processing of ocean bottom seismic (OBS) data. We have implemented an optimization process to correct jointly for these errors, while a water velocity model gets updated from an initial uniform estimate to a final time- and depth-dependent version at node locations. The main novel part in the process is using a non-linear clock-drift correction term and enhanced data pre-conditioning for optimization. A real data example confirms the success of the approach.